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Effect of Imperfect Channel Knowledge on M-QAM SER Performance of Space-Time Block Codes  

고은석 (연세대학교 전기전자공학과 정보통신연구실)
강창언 (연세대학교 전기전자공학과 정보통신연구실)
홍대식 (연세대학교 전기전자공학과 정보통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.2A, 2002 , pp. 99-108 More about this Journal
Abstract
In this paper, we discuss the effect of imperfect knowledge of the transmission channel on the M-QAM SER performance of space-time block codes. Because the channel knowledge is used for decoding of space-time block codes, the imperfect channel knowledge can degrade the performance of space-time block codes. In this paper, the channel mismatch error is modeled as errors in the estimation of the channel due to noise and errors due to the variation of the channel. We derive the analytic expression for the symbol error rate (SER) as a function of the average signal to interference ratio (SIR) per channel including the terms of channel mismatch errors. Simulation results show that the acceptable levels of channel estimation error is 10$\^$-3/ and that of channel variation is f$\_$d/T$\_$B/=0.001 at SNR=20dB in space-time block codes.
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