This document contains technical interview questions asked by Ericsson including:
1) Questions about how mobile phones work, handoffs in GSM networks, differences between TCP/IP and SSL, DNS lookups, TCP layers, converting decimal to binary, prime numbers, multiplexing, and modulation techniques.
2) A tip that ECE students interviewing at Ericsson should have programming skills.
3) Additional questions about waveguide propagation, Ethernet frame formats, STP/RSTP, VSWR, waveguides, the ALOHA protocol, information theory concepts, antenna properties, and GSM/CDMA comparisons.
Abis Over IP/Abis Optimization on-site Workshopetkisizcom
Recognize new system architecture
Understand the dimensioning rules using the Abis planning tools
Activate the Abis over IP
Activate the Abis Optimization
Use the Performance Monitoring
LTE specifications support the use of multiple antennas at both transmitter (tx) and receiver (rx). MIMO (Multiple Input Multiple
Output) uses this antenna configuration.
LTE specifications support up to 4 antennas at the tx side and up to 4 antennas at the rx side (here referred to as 4x4 MIMO
configuration).
In the first release of LTE it is likely that the UE only has 1 tx antenna, even if it uses 2 rx antennas. This leads to that so called
Single User MIMO (SU-MIMO) will be supported only in DL (and maximum 2x2 configuration).
An introduction to Cellular communications Signaling, Specifically LTE Signaling.
Introducing 3GPP approach to handover and handoff mechanisms.
LTE architecture by alcatel-lucent included in this presentation.
This presentation focuses on mobility management protocols such as GTP-C and GTP-U.
This presentation will give you a glance at NOKIA RNC solutions, RNC configuration,RNC cabinet mechanical structure,RNC architecture, RNC plug-in units (PIU)
,RNC function units (FUs), redundancy and PIUs configuration
Drive Tests and Propagation Prediction software are the two methods that are used to check the coverage area of a particular wireless system. Generally prediction software is used in conjunction with the radio signal measurements in order to determine an accurate picture of signal propagation. In some cases, field measurements may be needed to be taken in order to calibrate the prediction software.
Abis Over IP/Abis Optimization on-site Workshopetkisizcom
Recognize new system architecture
Understand the dimensioning rules using the Abis planning tools
Activate the Abis over IP
Activate the Abis Optimization
Use the Performance Monitoring
LTE specifications support the use of multiple antennas at both transmitter (tx) and receiver (rx). MIMO (Multiple Input Multiple
Output) uses this antenna configuration.
LTE specifications support up to 4 antennas at the tx side and up to 4 antennas at the rx side (here referred to as 4x4 MIMO
configuration).
In the first release of LTE it is likely that the UE only has 1 tx antenna, even if it uses 2 rx antennas. This leads to that so called
Single User MIMO (SU-MIMO) will be supported only in DL (and maximum 2x2 configuration).
An introduction to Cellular communications Signaling, Specifically LTE Signaling.
Introducing 3GPP approach to handover and handoff mechanisms.
LTE architecture by alcatel-lucent included in this presentation.
This presentation focuses on mobility management protocols such as GTP-C and GTP-U.
This presentation will give you a glance at NOKIA RNC solutions, RNC configuration,RNC cabinet mechanical structure,RNC architecture, RNC plug-in units (PIU)
,RNC function units (FUs), redundancy and PIUs configuration
Drive Tests and Propagation Prediction software are the two methods that are used to check the coverage area of a particular wireless system. Generally prediction software is used in conjunction with the radio signal measurements in order to determine an accurate picture of signal propagation. In some cases, field measurements may be needed to be taken in order to calibrate the prediction software.
Engineer EMERSON EDUARDO RODRIGUES PRESENTA UNA NUEVA VERSION
THERE ONE NEW ONE PRESENTATION FOR 2G AND 3G ENGINEERING FOR LTE AND PSCORE ENGINEER
ITS VERY SUITABLE FOR YOUR RESEARCH AT ALL LEVELS OF RF ENGINEERING AND PS CS
Intends to discuss about new data centric environment challenges due tsunami data traffic in mobile broadband and how industry is being prepared to address all of these changes.
A Lecture note on Nested MIMO in 2017, SeoulEalwan Lee
Nested MIMO/Spatial Mapping to boost the peak throughput of 802.11n WLAN IP
Transcript included.
[ Articles ]
https://www.design-reuse.com/articles/41280/mimo-wireless-lan-ip-core.html
http:/doi.org/10.13140/RG.2.2.30920.21766
[ First slides presented at IP-SOC 2016 | Grenoble, France]
https://www.design-reuse.com/ipbasedsocdesign/v_2016-3.html
TechWiseTV Workshop: Q&A for 802.11ac Wave 2Robb Boyd
Q&A from the Workshop: 802.11ac Wave 2 with Innovations for High-Density Networks
Watch the Replay: http://cs.co/9006Bq8bq
This was easily one of our most popular workshops. The slides are here in .pdf form as this is what SlideShare provides…but if you have not listened to the wireless experts we gathered for this one…stop, go to http://cs.co/9006Bq8bq and watch the replay. It is WELL worth your time. (I will post the Q&A we captured from this one soon….right here on Slideshare within a few days).
Three wireless wizards: Bill Rubino, Mark Denny, and Jim Florwick
The marketing description: To meet the needs of today’s demanding user environments, Cisco’s high-speed access points do much more than meet the 802.11ac Wave 2 standard. They go beyond it.
See how these highly intelligent solutions deliver greater flexibility, a more optimized wireless environment, and a better user experience through innovations such as flexible radio assignment, hyperlocation antenna, Bluetooth integration, and more.
Don’t miss this exclusive, in-depth look at the hardware that combines the highest Wi-Fi performance with powerful end-device efficiency. And remember to bring your toughest questions for our live Q&A. Save your spot now.
A few additional resources from TechWiseTV for you:
Two great animations:
- Learn more about MultiGig with our 'Fundamentals of NBaseT" https://youtu.be/87dsbpi3iCw
- "Fundamentals of 802.11ac WAVE 2" https://youtu.be/kjapSG_CvJc
TechWiseTV (The Show)
See the AP’s and Mark Denny: https://youtu.be/H8rPvJLcTww
Great stuff on Wireless Location Services: https://youtu.be/8HHrA1qkdAI
10Gb/s 80km DWDM SFP+ Transceiver Hot Pluggable, Duplex LC, +3.3V, 100GHz ITU...Allen He
SHPP-10G-Dxx-80 is a very compact 10Gb/s DWDM optical transceiver module for serial optical communication
applications at 10Gb/s, inter-converting the 10Gb/s serial electrical data stream with the 10Gb/s optical signal. It complies
with SFF-8431, SFF-8432 and IEEE 802.3ae 10GBASE-ZR. It provides Digital diagnostics functions via a 2-wire serial
interface as specified in SFF-8472. It features hot plug, easy upgrading and low EMI emission. The high-performance
DWDM EML transmitter and high-sensitivity PIN receiver provide superior performance for Ethernet applications up to link length of 80km on single mode fiber.
Features:
Supports 9.95 to 11.3Gb/s bit rates
Hot-Pluggable
Duplex LC connector
100GHz ITU Grid, C Band
DWDM EML transmitter, APD photo-detector
SMF links up to 80km
2-wire interface for management specifications compliant
with SFF 8472 digital diagnostic monitoring interface
Power Supply :+3.3V
Power consumption< 1.5W
Temperature Range: 0~ 70°C
RoHS compliant
10Gb/s DWDM SFP+ Transceiver Hot Pluggable, Duplex LC, +3.3V, 100GHz ITU Grid...Allen He
SHPP-10G-Dxx-40 is a very compact 10Gb/s DWDM optical transceiver module for serial optical communication
applications at 10Gb/s, inter-converting the 10Gb/s serial electrical data stream with the 10Gb/s optical signal. It complies
with SFF-8431, SFF-8432 and IEEE 802.3ae 10GBASE-ER. It provides Digital diagnostics functions via a 2-wire serial
interface as specified in SFF-8472. It features hot plug, easy upgrading and low EMI emission. The high-performance
DWDM EML transmitter and high-sensitivity PIN receiver provide superior performance for Ethernet applications up to link length of 40km on single mode fiber.
At present, the global information age has arrived, the total amount of data has exploded, and people's demand for data and information is increasing. The birth of LTE is to continuously optimize wireless communication technology to meet customers' higher requirements for wireless communication.
LTE is a long-term evolution of the UMTS technical standard formulated by the 3GPP organization, in 2004 The project was formally established and launched at the 3GPP Toronto meeting in December.
LTE is a wireless data communication technology standard. The current goal of LTE is to use new technologies and modulation methods to improve the data transmission capacity and data transmission speed of wireless networks, such as new digital signal processing (DSP) technologies, which were mostly proposed around 2000.
The long-term goal of LTE is to simplify and redesign the network architecture to make it an IP-based network, which will help reduce potential undesirable factors in the 3G transition.
LTE technology mainly has two mainstream modes, TDD and FDD, and the two modes have their own characteristics. Among them, FDD-LTE is widely used internationally, while TD-LTE is more common in my country.
The LTE (Long Term Evolution) project is an evolution of 3G, a transition between 3G and 4G technologies, and a global standard of 3.9G.
It has improved and enhanced the 3G air access technology, using OFDM and MIMO as the only standard for its wireless network evolution. It provides a peak rate of 100 Mbit/s for downlink and 50 Mbit/s for uplink under a 20MHz spectrum bandwidth, which improves the performance of cell-edge users, increases cell capacity, and reduces system delay.
In order to better understand LTE, we have listed 41 basic knowledge of LTE for your reference.
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.
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
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
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
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
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.
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!
1. Ericsson Technical Interview Questions
1. How does a mobile phone works?
2. Explain Hands off in detail? ( All GSM involved here on whatever you answer )
3. What is the difference between TCP/IP and SSL?
4. What will happen if I type Ericsson.com?
5. What will happen if I type Ericsson.com again?
6. At a DNS server how will you get your desired IP address from the millions of IP addresses present there?
7. What is the purpose of DNS?
8. In DNS S stands for ---SERVICE,SPACE,SYSTEM?
9. Explain all layers of TCP?
10. Give a program in C to convert a decimal number to binary?
11. What if the input inputted is negative?
12. What if the number inputted is zero?
13. What is a prime number?
14. How do u check it?
Give a better method??(if u keep a check of dividing from 2 to N-1)
15. A conversion from Hexa Decimal to binary
16. Explain TDM? Give diagram?
17. Give demerits of FDM?
18. What is a multiplexer? Whats is the purpose of using it?
19. How will you get a 16:1 multiplexer from 2:1 multiplexer?Explain thoroughly?
These are some questions of Ericsson Techincal interviews which my friends and me faced.
Tip--ECE students appearing in Ericsson should not skip programming. Atleast it cost me my interview.
how is the wave guide propagation pattern ??
Ethernet Frame format? Explain STP and RSTP and how t oextend the vlans beyond 4094
Question What is VSWR? what are waveguides and their types. What is Aloha?
2. Shannon's information capacity theorem, Sampling theorem, antenna
gain, types of antennae, GSM/CDMA comparison, modulation techniques,
Superheterodyne receiver
Voltage standing wave ratio
ALOHA is a old ethernet or networking protocol
sampling theorem:fs> 2fmax
G=4piD/lambda square
modulation tech:AM,FM,PM,QPSK,QAM,OFDM..
superheterodyne Reciever:its freq converter...or a frequency
synthesizer ckt for conversion of frequencies
What is meant by high impedance state in digital electronics?
In tri state devices, used in digital circuits there is a
third state beside logic 0 and logic one. That is called
High Impedance state.
By this state we mean that there will not be any change on
output even by changing our input. THis is due high
resistance offered by input circuit. So output get fixed in
such cases.
AKSHAY BISHT
(NITian)
Why the RSL of microwave link is in -ive?
What is the total output power of an complete BTS, in dbm & watts.
43dbm/20Wattb but this the output pwr of TRX So Total o/p
pwr of BTS depends on no. of TRX and also no. of combiner used
Explain BTS configuration 4+2+2
bts configration 4+2+2 means there are 4 trx in the 1st sector
then 2 in second sector
then 2 in the third sector
What's the range of C/A?
C/A >-9 dbm
it is the logarithmic difference of Adjacent channel
frequencies.
What is VSWR? what are waveguides and their
types. What is Aloha? Shannon's information
capacity theorem, Sampling theorem, antenna gain, 1 204
types of antennae, GSM/CDMA comparison,
modulation techniques, Superheterodyne receiver
What's the range of C/A? 2 595
What's The
why rxlevel is negative valued ??? Range Of C/ 2 714
A?
what is sdh,pdh?how exactly the call get
Relaince 7 1797
connected?
what is SDH and PDH relate the differences
2 3383
between them?
what is the features of GSM Technology and
4 2207
CDMA technology
3. Telecom BSS related ques: For cascaded 1800
BTS with master 900 BTS,if 900 master BTS is
down for its own equipment fault,cascaded slave
1800 BTS gets down/stop carrying traffic without
any fault as BCCH and other controllong channels
are in master 900 BTS.Is there any Yes Nokia
technology/system to turn the slave 1800 BTS to a Sieman 1 3318
single 1800 BTS autometcally when 900 master Network
BTS is down for its own equipment fault???It is
possible to make the slave 1800 BTS single live
BTS manually.But I want to know the autometic
system/process.if there is any....if not available,
how can we generate the system??
3.Which type of fading cause serious distortion of
modulated signal a)selective fading b)interference Hcl 7 2887
fading c)absorption fading d)polarization fading
What is the ruturn loss? 4 1595
what is VSWR? Ericssom 3 6432
Waht is polarization,explain verical and
6 2774
horizantal?
What is the GSM fundamental? 7 3548
how can we increase back up of 300ah battery.can
3 1701
we connects one more 300ah parallel or series?
what is the use of combiner in gsm phones 7 2456
what is integration,optimization of gsm
corenetwork in practice?
