Rank: 48 based on 4199 downloads (last 30 days) and 15 files submitted
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Krishna Sankar M

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Personal Profile:

Krishna Pillai is a Signal Processing Engineer based out of Bangalore, India. His typical activities on a working day involve identifying and modeling digital signal processing algorithms for wireless receivers.

He blogs @ http://www.dsplog.com.
The objective of the blog is to:
"Explain and discuss the basic text book concepts in digital signal processing and digital communication using simple Matlab/Octave scripts."

Professional Interests:
DSP, wireless communication

 

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Files Posted by Krishna Sankar M View all
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  • 15
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
27 Jun 2009 Screenshot MSK modulation and demodulation Script for MSK modulation/demodulation and computing BER for different Eb/N0 in AWGN. Author: Krishna Sankar M communications, ber, msk 349 0
27 Jun 2009 Screenshot Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M communications, alamouti, stbc, signal processing 324 5
  • 5.0
5.0 | 3 ratings
03 Dec 2008 Screenshot MIMO with Zero Forcing equalizer Describes a 2x2 MIMO system using Zero Forcing equalizer in Rayleigh fading channel. Author: Krishna Sankar M zf, mimo, communications, co channel interferen... 376 0
  • 5.0
5.0 | 1 rating
02 Oct 2008 Screenshot Simulation of an MSK transmission Generates an MSK transmission Author: Krishna Sankar M minimum shift keying, transmission, msk, transmit 243 1
  • 5.0
5.0 | 1 rating
13 Aug 2008 Screenshot BER for BPSK in Rayleigh channel Simulates the BER for BPSK modulation in Rayleigh channel Author: Krishna Sankar M communications, ber, bpsk, rayleigh, wireless 374 3
  • 2.0
2.0 | 1 rating
Comments and Ratings by Krishna Sankar M View all
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21 Oct 2009 Editing Matlab files in Vim Edit Matlab M-files in Vim editor (indentation, syntax highlighting, tags , mlint support) Author: Fabrice

Thanks Fabrice. Very useful.
May I request some more features for matching: in addition to existing, support matching groups as if/else, else/end, case/<next>case.

04 Apr 2009 Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M

@Yi Xiao: The channel power is indeed the scaling factor, no?
21 Mar 2009 Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M

@Yi Xiao: Well, for BPSK constellation, you are right - one need not divide by the channel power. However, for higher order modulations one needs to take care of the scaling factor such that the constellation boundaries can be defined correctly. Hence provided the equation for the general case. Hope this helps.
Comments and Ratings on Krishna Sankar M's Files View all
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05 Oct 2009 Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M Shanar

Hi Mate
This is really good work just I have simple question in my mind, can i emplement your code to work on IEEE802.16 transmitter receiver?
Thanks in advance
04 Apr 2009 Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M Krishna Sankar M

@Yi Xiao: The channel power is indeed the scaling factor, no?
02 Apr 2009 Simulating CDF of Peak to Average Power Ratio for OFDM Obtain the CDF plots of PAPR from an OFDM BPSK transmission specified per IEEE 802.11a specification Author: Krishna Sankar M Zhong

26 Mar 2009 Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M PRAVEENA

21 Mar 2009 Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M Xiao, Yi

Thank u, it helps a lot. By the way, could u please recommend me some paper or articles that talk about the scaling factor problem for Alamouti's code in higher order modulation?

I am studing on Alamouti's paper and I can get the same simulation result when using BPSK but not for QPSK, ur code inspires me alot and I want to learn more about scaling factor u mentioned.

Thanks again.

Top Tags Applied by Krishna Sankar M
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wireless, ber, communications, error rate, 16psk
Files Tagged by Krishna Sankar M View all
  • 1 - 5 of
  • 15
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
27 Jun 2009 Screenshot MSK modulation and demodulation Script for MSK modulation/demodulation and computing BER for different Eb/N0 in AWGN. Author: Krishna Sankar M communications, ber, msk 349 0
27 Jun 2009 Screenshot Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M communications, alamouti, stbc, signal processing 324 5
  • 5.0
5.0 | 3 ratings
03 Dec 2008 Screenshot MIMO with Zero Forcing equalizer Describes a 2x2 MIMO system using Zero Forcing equalizer in Rayleigh fading channel. Author: Krishna Sankar M zf, mimo, communications, co channel interferen... 376 0
  • 5.0
5.0 | 1 rating
02 Oct 2008 Screenshot Simulation of an MSK transmission Generates an MSK transmission Author: Krishna Sankar M minimum shift keying, transmission, msk, transmit 243 1
  • 5.0
5.0 | 1 rating
13 Aug 2008 Screenshot BER for BPSK in Rayleigh channel Simulates the BER for BPSK modulation in Rayleigh channel Author: Krishna Sankar M communications, ber, bpsk, rayleigh, wireless 374 3
  • 2.0
2.0 | 1 rating
 

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