This document describes two lab experiments using the TIMS modeling system:
1) A CDMA lab to generate and detect CDMA signals with and without noise using modules like the sequence generator, multiple sequence source, and CDMA decoder.
2) An OFDM lab to implement an OFDM generator using modules like the sequence generator, multiplier, and adder and generate/analyze OFDM waveforms. The document provides background on CDMA and OFDM multiple access schemes.
This presentation based on TDMA technology,How it works,comparison between TDMA,FDMA,CDMA,Advantages and disadvantages of TDMA,Synchronization of TDMA and Evolution of TDMA
This presentation based on TDMA technology,How it works,comparison between TDMA,FDMA,CDMA,Advantages and disadvantages of TDMA,Synchronization of TDMA and Evolution of TDMA
CDMA 1x Introduction to Power Control Issue2.1Tempus Telcosys
One of the aims of the CDMA1X system is to maximize the number of its users. If each mobile station (MS) adjusts its transmitter power to minimize the signal noise received by the base transceiver station (BTS), the capacity of the system is maximized. Higher power brings higher interference and results in more capacity loss. Power control can adjust the transmission power of the MS and BTS, aiming to minimize the interference
After learning this course, you will learn the following：
The importance of the power control of the CDMA system
Categories and calculating theories of the power control
Data configuration of the power control
Chapter 1 Goals and Principles of Power Control
Chapter 2 Categories and Arithmetic of Power Control
Chapter 3 Data Configuration of Power Control
Each couple of customers is in a same room.
Each couple of customers speaks a language different from that spoken by other couples.
If the noise becomes louder, all the customers will raise their voices.
If the noise is too louder, the customers may go to other rooms.
The customer who speaks too loudly will affect the communication of others.
The transmission power of the control BTS and MS must ensure that the signal sent to the receiver through the complicated radio space can meet the threshold of correct demodulation.
When the first principle is satisfied, the transmission power of the BTS and MS is required to be lowered as much as possible to decrease the interference between users and best optimize the network performance.
The transmission power of the MS near the BTS is lower than that of the MS far from the BTS and of the MS in the fading areas.
you can be friend with me on orkut
"mangalforyou@gmail.com" : i belive in sharing the knowledge so please send project reports ,seminar and ppt. to me .
Ecet 380 Enthusiastic Study / snaptutorial.comStephenson60
Antenna Design
Key Conclusions (technical):
Key Conclusions (critical thinking):
I.OBJECTIVES
Introduction to the most commonly used antenna types and significant design parameters
Design an antenna suitable for a 2G, 3G or 4G wireless application deployment.
CDMA 1x Introduction to Power Control Issue2.1Tempus Telcosys
One of the aims of the CDMA1X system is to maximize the number of its users. If each mobile station (MS) adjusts its transmitter power to minimize the signal noise received by the base transceiver station (BTS), the capacity of the system is maximized. Higher power brings higher interference and results in more capacity loss. Power control can adjust the transmission power of the MS and BTS, aiming to minimize the interference
After learning this course, you will learn the following：
The importance of the power control of the CDMA system
Categories and calculating theories of the power control
Data configuration of the power control
Chapter 1 Goals and Principles of Power Control
Chapter 2 Categories and Arithmetic of Power Control
Chapter 3 Data Configuration of Power Control
Each couple of customers is in a same room.
Each couple of customers speaks a language different from that spoken by other couples.
If the noise becomes louder, all the customers will raise their voices.
If the noise is too louder, the customers may go to other rooms.
The customer who speaks too loudly will affect the communication of others.
The transmission power of the control BTS and MS must ensure that the signal sent to the receiver through the complicated radio space can meet the threshold of correct demodulation.
When the first principle is satisfied, the transmission power of the BTS and MS is required to be lowered as much as possible to decrease the interference between users and best optimize the network performance.
The transmission power of the MS near the BTS is lower than that of the MS far from the BTS and of the MS in the fading areas.
you can be friend with me on orkut
"mangalforyou@gmail.com" : i belive in sharing the knowledge so please send project reports ,seminar and ppt. to me .
Ecet 380 Enthusiastic Study / snaptutorial.comStephenson60
Antenna Design
Key Conclusions (technical):
Key Conclusions (critical thinking):
I.OBJECTIVES
Introduction to the most commonly used antenna types and significant design parameters
Design an antenna suitable for a 2G, 3G or 4G wireless application deployment.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
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The tutorial is designed for all those readers who are planning or pursuing the CDMA course to make their career in this field. However, it is also meant for the common readers who simply want to understand − what is CDMA Technology?
I use this presentation for opening 4G Mobile Technology seminar sessions. Usually it will be continued with 1 other presentation on LTE, 1 on WiMAX II, and 1 on applications.
This tutorial has been designed for audiences with a need to understand the LTE technology basics in very simple terms. This tutorial will give you enough understanding on LTE technology from where you can take yourself at higher level of expertise.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Cambridge International AS A Level Biology Coursebook - EBook (MaryFosbery J...
Devry ecet 380 week 5 lab code division multiple access a 3 g cellular multiple access scheme new
1. DEVRY ECET 380 Week 5 Lab Code Division
Multiple Access A 3G Cellular Multiple Access
Scheme NEW
http://www.uopassignments.com/ecet-380-
devry/ecet-380-week-5-lab-code-division-
multiple-access-a-3g-cellular-multiple-access-
scheme-recent
For more classes visit
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Code Division Multiple Access A 3G Cellular
Multiple Access Scheme
I. OBJECTIVES
1. Use the TIMS modeling system to generate a
CDMA signal.
2. Detect the messages transmitted in the CDMA
signal in a noiseless channel.
3. Add degradation in the form of noise to a CDMA
signal.
4. Study the effects of noise on a CDMA signal.
II. PARTS LIST
Equipment:
IBM PC or Compatible with Windows 2000 or
Higher
2. Software:
TutorTIMS – Version 2.0 Advanced
The following TIMS modules will be required for
the lab. Read about the modules required for the
particular lab section before proceeding:
1. Sequence Generator
2. Multiple Sequence Source
3. Master Signals
4. Adder
5. Digital Utilities
6. Quadrature Utilities
7. Noise Generator
8. CDMA Decoder
9. Error Counting Utilities (Error Counter)
10. Phase Shifter
III. INTRODUCTION
The scarcity of the available spectrum and the
explosive growth in the popularity of wireless
communications devices absolutely imposes the
need for the sharing of the available bandwidth
among wireless applications subscribers. A
number of multiple access schemes exist to meet
this demand, each with its own merits and
demerits, including:
• FDMA - Frequency Division Multiple Access:
3. Deployed in the now mostly outdated 1G
standards, this scheme was highly bandwidth
inefficient.
• TDMA - Time Division Multiple Access: More
spectrally efficient than FDMA and still in
operation in 2G standards such as GSM, which is
still widely deployed in many countries around the
world. TDMA is also the multiple access scheme of
choice for most of the wireless data-centric
standards.
• CDMA - Code Division Multiple Access: This is the
access scheme of choice for 3G and other evolving
standards such as CDMA 2000 and W-CDMA. This
scheme, when combined with spread spectrum,
imparts certain advantages, as we shall observe in
this lab. It should be noted that the combination of
the multiple access scheme and the duplexing
method (TDD, FDD) used in an application is
known the “air interface” method for that
particular application.
CDMA
In the CDMA scheme, each subscriber is assigned a
unique code which is as different from that
assigned to all other subscribers as possible. This
setup allows the subscribers to use the same
4. allotted spectrum, say in a particular cellular
communications cell, with minimal interference to
one another.
In the CDMA scheme, there is no need to divide the
spectrum into tiny bands, as in FDMA, and
subscribers do not have to take turns occupying a
relatively large available bandwidth, as in TDMA.
This means that in CDMA applications, a relatively
large bandwidth is occupied all of the time when
allotted to a subscriber.
One can thus see why CDMA is the scheme of
choice for the 3G and beyond cellular standards.
Little frequency planning is needed. It also has a
large occupied bandwidth, without the latency
issues that arise from time division sharing. This
all leads to the possibility of supporting very high
data rates, when combined with other PHY layer
schemes such as modulation and compression. In
addition, the technique of spread spectrum, which
is bandwidth driven, can be exploited. This helps
mitigate channel-imposed degradations, such as
multipath fading.
Table 1 shows CDMA deployment in 2G and
beyond cellular standards with 2G GSM shown for
comparison:
5. Introduction to OFDM Generation
IV. OBJECTIVES
1. Introduce the student to the underlying theory
of operation of Orthogonal Frequency Division
Multiplexing (OFDM).
2. Learn to use TIMS modules to implement an
OFDM generator scheme.
3. Generate and analyze OFDM waveforms.
V. PARTS LIST
Equipment:
IBM PC or Compatible with Windows 2000 or
Higher
Software:
TutorTIMS – Version 2.0 Advanced
The following TIMS modules will be required for
the lab. Read about the modules required for the
particular lab section before proceeding:
11. Sequence Generator
12. Multiplier
13. M-Level Encoder
14. Phase Shifter
15. Master Signals
16. Adder
17. Tunable LPF
6. 18. 100 KHz Channel Filters
19. Decision Maker
VI. INTRODUCTION
OFDM (Orthogonal Frequency Division
Multiplexing) is a combination of modulation and
multiplexing, and more specifically, is a special
case of Frequency Division Multiplexing (FDM), as
the name implies.
A single main data stream is split into many lower
rate data streams (multiplexing). Each of these
streams is then individually modulated onto a
separate sub-carrier (modulation) and finally
recombined into a single composite OFDM signal
to be transmitted.
The addition of a cyclic prefix is also an important
part of OFDM, however, this feature will be
discussed but not implemented in this
introductory experiment. The coding blocks will
not be covered in detail within this experiment.
7. 18. 100 KHz Channel Filters
19. Decision Maker
VI. INTRODUCTION
OFDM (Orthogonal Frequency Division
Multiplexing) is a combination of modulation and
multiplexing, and more specifically, is a special
case of Frequency Division Multiplexing (FDM), as
the name implies.
A single main data stream is split into many lower
rate data streams (multiplexing). Each of these
streams is then individually modulated onto a
separate sub-carrier (modulation) and finally
recombined into a single composite OFDM signal
to be transmitted.
The addition of a cyclic prefix is also an important
part of OFDM, however, this feature will be
discussed but not implemented in this
introductory experiment. The coding blocks will
not be covered in detail within this experiment.
