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Yi Xiao

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Comments and Ratings by Yi		View all 1 - 2 of 2
Updated	File	Comments	Rating
21 Mar 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M	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.
18 Mar 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M	Very good! Clear codes and explanation. Only one question, why we need these lines: yHat = sum(hEq.yMod,1)./hEqPower; yHat(2:2:end) = conj(yHat(2:2:end)); I mean, if the decision rule is: ipHat = real(yHat)>0; Then yHat = sum(hEq.yMod,1) will be enough for everything. Why do we need to divide it by the power of the channel and do the conjugate for h2y1 -h1y2 ? I am a little bit confused here.

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Type	Description
File	BPSK
File	Alamouti STBC

Files Matching Yi's Watch List				View all 1 - 2 of 2
Updated	File	Tags	Downloads (last 30 days)	Comments	Rating
27 Jun 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC) Author: Krishna Sankar M	communications, alamouti, stbc, signal processing	224	5	5.0 5.0 \| 3 ratings
24 Sep 2008	BPSK BPSK modulator and demodulator Author: rohit datta	communications, wireless, modulator, wireless communicatio..., demodulator	68	2

Comments and Ratings Matching Yi's Watch List			1-5 of 7
Date	File	Comment by	Comments	Rating
05 Oct 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC)	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	5
04 Apr 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC)	Krishna Sankar M	@Yi Xiao: The channel power is indeed the scaling factor, no?	Comment only
26 Mar 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC)	PRAVEENA		5
21 Mar 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC)	Yi Xiao	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.	Comment only
21 Mar 2009	Alamouti STBC Discuss 2Tx. 1Rx transmit diversity scheme called Alamouti Space Time Block Coding (STBC)	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.	Comment only

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