How different is the "equalization" in TDMA systems like GSM from "equalization" in OFDM systems such as LTE?

Complex equalizers are needed in GSM while LTE resort to simpler equalization techniques due to its narrow band sub-channels. How to explain this difference in a simple way?

04 May 2014 4,942 12 View

What innovative ideas were held for a while before being really used (in the field of communications engineering)?

I will give a few examples of some of the ideas that historically were cooked/invented/ or suggested at one point in the history of communications but it took sometime after that date to actually...

02 March 2014 7,190 9 View

How can Yahoo provide each of us 1 T byte of storage for free with confidence?

Companies like Yahoo claimed that they are offering us infinite storage (limit on website is 1 T byte). Even with such a limit, 1 T still a big quantity even with the drop of storage prices. It...

09 October 2013 5,597 8 View

Need your assesment of a suggested curriculum approach for computer engineering in developing countries.

Dear Colleagues, I attached to this question an extended abstract article (2 pages) in which I suggested a new approach for computer engineering curricula in universities in developing countries....

06 July 2013 623 14 View

How can utility measures and other economic parameters be used for the optimization of resources in wireless networks?

Economic theories can be used to efficiently use the resources of frequency, time, etc... in wireless networks while satisfying the needs of users described by Utility functions. In economics,...

05 June 2013 9,404 2 View

How do self organizing networks (SON) act?

With the advent of small cells like Femto cells which may be randomly placed, go on and off, and usually not accessible to phone companies, it became necessary that these cells coordinate among...

04 May 2013 5,050 3 View

Broadbroad provisioning and directions

The concept of broadband has developed over the years, what we considered a broad-band a few years ago may not be considered so nowadays and what we are considering broadband today may not be that...

03 April 2013 513 8 View

4G technologies WiMax and LTE. What are the main technical differences?.

WiMax, which is the technology standardized by IEEE, and LTE, standardized by 3GPP, are two competing technologies, nevertheless, are very much technically similar. This is almost true when...

03 April 2013 8,884 15 View

Ambiguity in the use of fading terms in wireless communication.

Fading is a major impairment to wireless communication. The problem is that the term fading has many classifications and the terminology seems sometimes to be ambiguous. In many cases you need to...

02 March 2013 4,690 9 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Which SAR dataset to use for generating coherency matrix and performing target decomposition (Description) ?

Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...

02 March 2021 8,481 3 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View