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FHA/1 Space Diversity: Modelling and Performance Study.doc FHA/1 Space Diversity: Modelling and Performance Study.doc Document Transcript

  • MSc Projects offered for 2006/2007 Individual Projects for MSc students in : • Embedded Digital Systems • Modern Communication Technologies with Business Management • Modern Digital Communications Systems • Satellite Communications & Space Systems
  • Dr Falah H ALI FHA/1 Space Diversity: Modelling and Performance Study Space diversity is one of the most effective techniques to combat multipath fading in mobile wireless communication systems by providing redundancy in the spatial domain. The aim of this project is to study simple transmit and receive space diversity techniques using MATLAB simulation tools. The student is expected to make use of the large research literature on this topic and exploit the latest techniques for further performance improvement and applications. FHA/2 DSP Implementation of Multicarrier Transmission System Multcarrier also called OFDM is orthogonal frequency division multiplexing technique which employ more than one carrier frequency for the parallel transmission of data to provide superior performance in mobile wireless communication systems. It is the core modulation technique in many systems such as digital video broadcasting (DVB), wireless local area networks (WLAN), WiMAX Broadband Wireless Access, and more. The aim of this project is to design and implement a flexible OFDM transmission system on Texas Instrument DSP development board. FHA/3 Video Analysis Framework The aim of the project is to create a general purpose integrated platform for performance measure and analysis of video coding and transmission systems. This project will use the available Microsoft DirectShow media framework for software development as the platform for the implementation of different operations and functionalities. The student would benefit from the large database and information available within the communications research group for MPEG4 video codec. Good programming skills with C/C++ would be useful for the project. FHA/4 Multi User Detection for CDMA Systems CDMA is a code division multiple access technique employed in 3rd generation of wireless communication systems such as the W-CDMA for UMTS cellular mobile systems. It uses the code to provide the multiple access function with increased capacity and superior performance compared with other techniques such as FDMA & TDMA. However one of the main limitations of CDMA is the multiple access interference created by the use of non-orthogonal code sequences between the users. The aim of this project is to study multiuser detection techniques and exploit the use of channel coding for further performance improvement with the aid of MATLAB software package FHA/5 Wireless Control Wireless communications are currently widely used in many applications as a cable replacement technology and networking capabilities. There are many applications in industrial environment and control that could benefit greatly from wireless technology if the real time and deterministic requirements essential for these systems are met. The aim of this project is to research the application of wireless technologies in different control applications, identify the practical limitations and conduct practical/simulation performance study with the aid of WLAN and Bluetooth development boards available within the communications research group lab. FHA/6 Collaborative Transmission for Multiuser Wireless Systems Collaborative transmission are one of the proposed strategies in multiuser wireless communication systems to provide more efficient way of utilizing the available resources and providing higher capacity systems. The aim of this project is to research the main techniques of collaborative transmission in mobile cellular systems and Adhoc networks and to perform simulation study of simple schemes using MATLAB or NS2. FHA/7 Cryptosystem for Adhoc Networks The aim of the project is to study security issues and techniques for WLAN and implement by software a new secret sharing scheme developed within the Communications Research Group applicable to Adhoc networks. FHA/8 & /9 Student Proposed Projects
  • Dr Rupert C D YOUNG RY/1 Mobile robot employing artificial vision for route navigation A mobile robot has been developed on a previous project that employs the images acquired from an on-board camera and pattern recognition software to steer the robot towards features placed at locations on a pre-determined route. In this way the robot can attempt to navigate between these points to a final goal. The algorithms implemented at present are rather limited and require substantial further work to enhance the robustness and flexibility of the robot’s navigation. The work will involve implementing further machine vision techniques to enhance the performance of the robot. RY/2 Object orientation independent pattern recognition The project will develop frequency domain based correlation filters for the orientation independent recognition and discrimination of three dimensional objects such as road vehicles in a cluttered environment. The work will involve the development and implementation of filtering algorithms for this pattern recognition task and their comparative performance assessment on an existing image database of test imagery. The simulation code will be written in Matlab or C. RY/3 Neural Network for Object orientation independent pattern recognition The project will employ neural network methods to design filter banks for the orientation independent recognition and discrimination of three dimensional objects, such as road vehicles, in a cluttered environment. The work will involve the development and implementation of filtering algorithms for this pattern recognition task and their comparative performance assessment on an existing image database of test imagery. The simulation code will be written in Matlab or C. RY/4 Wiener filter for watermark detection If precise knowledge of the background in which a signal is embedded is available, Wiener filtering provides a powerful method to extract this signal. The difficulty is that generally knowledge of the background’s full complex spectrum is unavailable. However, in some circumstances this is not the case and the full form of the Wiener filter can be used to great effect. This project will examine the use of the Wiener filter in an application of great current importance, namely the digital watermarking of documents and pictures for authentication purposes during internet transfer. The simulation code will be written in Matlab or C. RY/5 Automated Event Detection from video Camera Sequences It is required to automatically detect certain events from surveillance camera sequences. This requires the extraction of semantic information from the raw pixel data. In certain simple instances this is now possible but the techniques require considerable enhancements to allow higher level extraction of information. This work requires the development of suitable low level, intermediate level and high level data extraction methods on camera image sequences. The simulation work will be performed in Matlab or C. RY/6 Texture Analysis of Medical X-Ray Images The group collaborates with the Medical School in developing frequency domain image processing techniques to quantify the texture in the x-ray and Computer Assisted Tomogram images of a variety of organs including liver, lung and breast. This project will continue the design and assessment of orientation sensitive texture analysis methods that will provide enhancement of texture features in the tissue that are related to various forms of tumour. The code will be written in Matlab to integrate with the existing texture analysis software developed by the group. RY/7 Texas Instruments C67 DSP Board Development The project will involve the porting of signal processing algorithms to a Texas Instruments C67-11 development kit and the optimisation of performance. In particular, it is required to implement video rate pattern recognition techniques based on frequency domain filtering. Thus, central to this requirement is the realisation of a video-rate 2-D Fourier transform. The hardware and compilers will be available for this work.
  • Drs Robert J Prance, Dr Helen Prance, Dr Chris J Harland Research Group: Centre for Physical Electronics and Quantum Technology (PEQT) N.B. All PEQT projects are hardware based microwave design and build projects. Attendance at the Autumn Term optional course RF Electronic Design is a prerequisite for these projects. PEQT/1 10GHz low noise block. The performance of a correctly designed microwave receiver is usually limited by the first stage amplifier. It is therefore crucial that this is optimized. This project involves the design and construction of a low noise amplifier and mixer to operate at 10 GHz and down-convert the signal to 1GHz. They will be designed using S parameter techniques. The student will gain experience in the testing of microwave components and operation of simple spectrum analyser equipment as well as in the use of sophisticated noise measurement techniques. The system will be mounted on a parabolic dish with a suitable antenna for final testing. PEQT/2 Time domain reflectometry using picosecond pulses. Time Domain Reflectometry is an analogous technique to echo sounding and involves the application of pulses to transmission lines and components. Analysis of the reflected (and sometimes the transmitted) signals gives information from which we can infer the parameters of passive components terminating the transmission line. The project will involve the design and construction of a test setup and measurement probes suitable for this purpose. Initially a commercial picosecond pulse generator will be used, but if time is available the student may wish to design and build a fast pulse source. Delay lines will be used to simulate fault conditions at remote sites and to provide easily measurable time delays. PEQT/3 1GHz receiver. This project will involve the design and construction of two of the key elements in any receiver system; a low noise amplifier and a mixer. They will be designed using S parameter techniques for an operating frequency of ~1GHz. The mixer will be used to provide demodulation and to give the lowest noise performance. The student will gain experience in the testing of microwave components and operation of simple spectrum analyser equipment as well as in the use of sophisticated noise measurement techniques. The final system will be tested with a simple antenna to determine the sensitivity. This frequency range is of particular interest to the mobile communications industry. PEQT/4 Characterisation of components using microwave bursts. The next generation of computing machines will operate according to the rules of quantum mechanics. Current research on such semiconducting and superconducting systems requires them to operate at very low temperatures (<1K = -172C), close to absolute zero. It seems likely that these exotic systems will interact with the outside world through very fast microwave bursts. This project is concerned with setting up a test setup to transmit these short microwave bursts through a long (~1m) cable and analyse the reflected pulse through another 1m length of cable. A stripline circuit will be designed to terminate the cables and the properties of the termination will be deduced from the analysis of the reflected pulse. PEQT/5 Amplifier characterization and specification The performance of low noise receiver systems depends critically on the behavior of the pre- amplifier stage. This includes not only the noise performance, but the impedance match, centre frequency, bandwidth, linearity, dynamic range and overload margin. This project will involve gaining an understanding of the process of specifying an amplifier and characterizing an amplifier to determine whether it meets its specification. This will include drawing up a procedure for testing amplifiers and the use of sophisticated radio frequency spectrum analyzer equipment. The student will gain experience in an area of interest to the communications industry. PEQT/6 Mixer characterization and specification A vital component in any receiver systems is the mixer stage. This changes the frequency of the received signal and down-converts it to the intermediate frequency, where the majority of the amplification takes place. It is important that the performance is well characterized. This includes not only the conversion loss, but the impedance match, port to port isolation, bandwidth, linearity, dynamic range (1dB compression) and intermodulation products. This project will involve gaining an understanding of the process of testing a mixer to determine whether it meets its specification. This will include testing and comparing the performance of a number of mixers using sophisticated radio frequency spectrum analyzer equipment.
  • Dr William J WANG WJW/7 Time-frequency and wavelet analysis for pipe leaking signals Application of time-frequency and wavelet analysis into signals which represent physical processes, such as audio or machine vibration signals. Mathematical derivation, MATLAB computing with examples. Interest in math and signal analytical analysis is preferred. The application focus will be on analysis of the steam leaking signals on pipes. WJW/8 Underwater Communications Water is conductive and signals can be substantially grounded. Electromagnetic signal will be difficult to propagate in a river or particularly in the sea. The project is to understand how different types of radio wave being attenuated in the water and develop an economic acoustic transmitter and receiver to effectively communicate under the water. WJW/9 3D face recognition for Security TV Development of 3D face recognition methods for more reliable face recognition tasks. Image processing and Pattern recognition using PC. The technique can be used to identify suspects while CCTV is operating. The project covers the topic that how this techniques can be integrated into practical CCTV surveillance systems. WJW/10 Tele-monitoring system via Internet Home or office can be monitored by camera via Internet links. The remote end is a digital video camera with an Internet server. The monitoring end is the ordinary PC. Functions may also be added via Internet to control remotely. The knowledge of programming, computer interface, computer networking and internet protocol may be required. WJW/11 Digital Camera Translator Added to a digital camera, a word translation system is to be developed to translate from one language to the other, displayed by sound or image, which is particular useful for visitors in foreign countries. Interface between digital and optic devices, pattern recognition, microprocessor will be involved.
  • Dr Tai C YANG Detailed project descriptions can be found at: http://www.sussex.ac.uk/Users/taiyang/ Click on: “MSc Projects”. Please read this before contacting Dr Yang. At the start of the project, each student will get a CD-ROM with all required background materials and other useful information. During the “full-time” project period of May to August, weekly project meetings will be arranged for each group of students. Below are the titles of proposed projects. Group A: Simulation Study of Networked and Embedded Control Systems. Introduction: Today, computerised and networked control systems are being used in almost all application sectors to perform non-safety and, increasingly, also safety-related functions for reasons of their inherent efficiency and flexibility. The significance of these embedded systems in everyone’s life is rapidly growing. TCY/1 Networked and embedded control under the FDMA protocol TCY/2 Networked and embedded control under the TDMA protocol TCY/3 Networked and embedded control under the CAN protocol TCY/4 Networked and embedded control under the Ethernet protocol TCY/5 Networked and embedded control under the Round Robin protocol TCY/6 Networked and embedded control under the IEEE 802.11 protocol TCY/7 Networked and embedded control under the Switched Ethernet protocol TCY/8 Sampling period scheduling in embedded control systems Group B: Wireless and Ad-Hoc Networks: Challenges and Applications TCY/9 Medium Access Control (MAC) protocols for ad hoc wireless networks TCY/10 Quality of service provisioning in ad hoc wireless networks TCY/11 Mobile IP in cellular and Mobile Ad-Hoc Network environments TCY/12 Routing protocols for wireless sensor networks TCY/13 Clock synchronization for wireless sensor networks TCY/14 Security of 802.11 wireless LAN TCY/15 Security of Bluetooth wireless networks TCY/16 Wireless technologies in industrial networks TCY/17 Wireless actuator networks Group C: Other Possible Project See the webpage above for details of additional projects. Special Projects TCY/18 Demonstration of Networked Control Systems (See Dr Yang)
  • Dr John N TORRY JNT/1 Programmable Parametric Equaliser The normal graphic equaliser, such as used in a stereo/CD player, gives a variable amount of boost or cut at a specific frequency so that playback can match the acoustics of the room. In a reasonable hi-fi systems there will be a bank of 8 graphic equalisers at octave intervals over the audio frequency range. A parametric equaliser has up to three controls (i) for boost/cut (ii) for centre frequency and (iii) for variable bandwidth and is usually built into mixer desks. The parametric equaliser is an analogue circuit with several potentiometers for varying the parameters. The control needs to be accurate. Digitally programmable potentiometers are available and using a microcontroller is the best way to achieve accurate control. A PIC would be suitable, with various outputs for controlling the potentiometers and various inputs for taking information from analogue sliders or rotating knobs. Optionally a display could be added to monitor the input details. Requires: Analogue circuit design and calculations, digital interface, PIC software programming as assembler level (real-time operation and relatively straightforward). JNT/2 Heart Sound Detection with Noise Cancellation The traditional stethoscope should be replaced with its electronic equivalent. In fact, many designs are already on the market but there are not many in general usage. The cost and simplicity of original rubber tubing, metal diaphragm and ear pieces takes a lot of beating. In the electronic device when trying to get away with inexpensive electret microphones, background noise becomes a problem. Mounting a microphone in a stethoscope head enables reasonable heart sound signals to be detected. The project involves mounting a second microphone close to the first but pointing out towards the room. Subtracting the signals from both microphones should enable some noise cancellation to be achieved. The amount of cancellation will probably depend on bandwidth (wavelength of sound), distance apart of microphone and phase accuracy of any electronic amplifiers (opposite to stereo effect). JNT/3 dB Meter This is a sound intensity level meter with a logarithmic output. A microphone and preamplifier are required - then follows a variable gain amplifier to cover the expected wide range of sound intensity – then follows a detector and hold circuit (diode and capacitor). The analogue level needs to feed into a PIC, or similar microcontroller, converted to a log scale (look-up table required) and displayed. The PIC also needs to control the amplifier gain using, say, some range-switching resistors. JNT/4 Digital Theremin The Theremin is one of the original electronic music instruments. The pitch was changed by moving ones hand towards or away from a metal dome. The differing stray capacitance varied the beat frequency from two closely tuned oscillators to produce notes in the audible range. The performer could “feel” the response rather than playing a keyboard or musical instrument. A modern digital equivalent requires some spatial detector (e.g. ultrasound) to measure distance and a means of converting the signal such as digitally-controlled oscillator. Options could include monitoring the volume (a second hand movement was used in the original), and converting the signal to give MIDI output for a standard synthesiser. JNT/5 Oversampling A/D converter with first-order noise shaping In audio recording most systems now use the oversampling technique i.e. high frequency sampling with a low bit resolution rather than high number of bits (16) and sampling at the Nyquist rate (twice the highest frequency). Using one-bit resolution i.e. a comparator and high sampling rate, 10MHz say, the traditional analogue problems how become digital problems which are then tackled using digital signal processing. The project is to build a discrete oversampling converter using one integrator for first-order shaping of the quantisation noise. Switched-capacitor integrators are more flexible than normal analogue integrators and enable the sample and hold function to be included in the same circuitry. Requires: Analogue design and build, some digital logic and some maths background for understanding the overall system. There is an option to extend the post processing by including some digital filter hardware for the process of “decimation”.
  • Prof Chris R Chatwin CRC/1 Low cost Space vehicle launch and Propulsion Systems Conduct a design study for low cost space vehicle launch systems; investigate the options for increasing the payload that can be launched into space. CRC/2 Design of low cost Micro Satellites Systems Investigate micro-satellite technology with a view to creating a new generation of low cost communication systems. CRC/3 Design of Satellite Networking and Satellite Communication Systems CRC/4 Unsupervised Learning Using Neural Networks Review the current state of the art and investigate a particular problem. CRC/5 Biometrics on a Mobile Phone Integration of biometric security systems onto a mobile phone CRC/6 Invisible labelling systems for track and trace Development of an invisible labels for tracking goods in the supply chain. This will use barcodes to encode product information. It will also conduct an investigation into RFID. CRC/7 Design of Industrial communication systems The study will look at the optimisation of price, performance and interoperability CRC/8a Web based services for the management of business operations CRC/8b Data processing electronics for a whisker sensing system CRC/9 Monitoring environmental resources using satellite imagery CRC/10 Meteorology Systems using Satellite imaging CRC/11 Space based beam weapons CRC/12 Planning a mission to a distant planet or moon CRC/13 Automatic Recognition of Road Signs from cars using low cost cameras and image processing software – this gathered information will made available to the driver and alarms will by given if the driver makes an error. CRC/14 Design of web portal for sensor data A WSN is based upon hundreds of thousands of tiny sensor devices collectively monitoring a physical or environmental phenomenon. The applications of WSN fall in a wide range of categories such as: military surveillance, environmental monitoring, habitat monitoring, health care, home care/automation, automobile care/traffic control and industrial automation process monitoring etc. A typical sensor node comprises a sensing unit, a processing unit (CPU), a communication unit and a power unit (battery). Energy is a scarce resource of a sensor node. Most of the research work is in progress to find out energy efficient methods for WSN. There could be thousands of user queries for sensor data. In response to all these queries a node has to transmit data back to the requester through a base station or directly. Such frequent transmissions reduce the life of WSN. One solution to this problem would be to avoid direct queries from sensor nodes rather publish its data to a portal and all user requests are to be served by the portal. The sensor node may transmit its data to a base station only when there is significant change in the state of node data. The base station may query the specific node when it becomes necessary to refresh the node data. (More Projects on the next page)
  • Prof Chris R Chatwin (Projects continued) CRC/15 Method to avoid Multiple Retransmissions In a WSN if source and destination nodes are not capable of communicating directly and source uses in between nodes as relay nodes, this causes excessive transmissions of the data and results in more energy consumption during a single communication session. This problem of retransmissions may be reduced to some extent by designing efficient routing algorithms for WSN, which may select the best path for data transmission, in which the minimum number of relay nodes are used. An alternative solution to this problem could be to restrict the nodes from data transmission and set one node as data collector which collects data directly from sensor nodes. Setting one node as a data collector has many issues to be resolved like, mobility, data aggregation, and availability of data at the time of collection and so on. CRC/16 Efficient data gathering methods in WSN A WSN comprises thousands of low cost sensor nodes. Typical WSN tasks may be categorized as information gathering, and information processing for monitoring and surveillance purposes. Sensor nodes generate a large amount of network data by sending event data to their base station periodically. Such a huge quantity of data needs an efficient data collection and management mechanism. CRC/17 Sensor Node Identification In traditional IP networks a node is identified by its logical (IP address) and physical (MAC address) address. There is no logical or physical address identification mechanism in wireless sensor networks for node identification. Hence the node identification is still an issue of WSN for communication purposes. One solution to this problem is localization (determination of locality/position of a sensor node). The research in localization has not yet produced a satisfactory solution towards the node identification problem and needs more research in this area. The advantages of efficient node identification are minimal communication overhead, and energy efficient transmission, which increases the life of WSN.
  • Dr Elias STIPIDIS ES/1 TTP vectronics testbed Time Triggered Protocol (TTP) is state of the art technology in the automotive and avionics. TTP provides a strictly high level of determinism for real time safety critical systems and the objective of this project is to design a vetronics testbed using an integrated development environment provided by TTTech to research and evaluate its performance. Primarily the student will be asked to learn the development environment (hardware and software) and then implement a simulated vetronic system. It is a project that can be taken by more than one student. In co-operation with TTTech. ES/2 FlexRay testbed FlexRay is state of the art technology in the automotive and avionics. FlexRay provides a strictly high level of determinism for real time safety critical systems and the objective of this project is to design a testbed using an integrated development environment provided by Decomsys to research and evaluate its performance. Primarily the student will be asked to learn the development environment (hardware and software) and then implement a simulated vetronic system. It is a project that can be taken by more than one student. In co-operation with Decomsys. ES/3 MilCAN conformance and interoperability node It is important to accompany protocol specifications and standards with a robust method of determining how compatible new and existing products are. This project is concerned with the design and implementation of a conformance and interoperability node for MilCAN. A MilCAN core will be provided to be used for the project and the student will be asked to develop test procedures based on compliance matrices. ES/4 An army of ants This project is concerned with the design and development of 4 identical miniature robots, ants. They should be designed in such a way that they can communicate between them exchanging information and co-operate when given a group task. Concentrating on the electronic parts of the system the student should design the hardware and software as well as the communication protocol between the little robots. It is a project that can be taken by more than one student. ES/5 CANStar Controller Area Networks have specific limitations in their utilisation based on the methodologies they deploy eg bus arbitration. However, some of these limitations such as speed and fault tolerance can be improved by using a different architecture such as Star. The objective of this project is to design a CANStar core to be used for FPGAs where the CAN processes can be embedded into a single active node to form a “switched” CAN system architecture. Furthermore the student will be asked to implement a hardware extension to existing FPGA development boards and create a mini testbed. ES/6 MJPEG video distribution The student will be asked to do a literature review in compressed video distribution and then design a distributed video system with multiple inputs (cameras) and outputs (displays) using MJPEG streams. This involves the investigation of standard software codecs for MJPEG and streaming protocols and to create a testbed with multiple displays deploying a selection of the above. ES/SP Special Project Students are encouraged also to develop their own ideas for projects