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BER for BPSK in Rayleigh channel

by Krishna Sankar M

12 Aug 2008 (Updated 13 Aug 2008)

No BSD License

Simulates the BER for BPSK modulation in Rayleigh channel

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Description

Simple Matlab example simulating a BPSK transmission and reception in Rayleigh channel. The script performs the following

(a) Generate random binary sequence of +1’s and -1’s.

(b) Multiply the symbols with the channel and then add white Gaussian noise.

(d) Perform hard decision decoding and count the bit errors

(e) Repeat for multiple values of and plot the simulation and theoretical results.

The theoretical description provided in
http://www.dsplog.com/2008/08/10/ber-bpsk-rayleigh-channel/

MATLAB release

MATLAB 7 (R14)

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Everyone's Tags	ber, bpsk, communications, rayleigh, wireless
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Comments and Ratings (3)
14 Aug 2008	R Random	Once you divide the received signal by the known channel you have removed the impact of the channel totally. In other words, it is the same as an AWGN channel, and there is no fading in the model.
15 Aug 2008	Krishna Pillai	@random: May I suggest that your observation is incorrect. Even when we know the channel, and divide the received symbol by the known channel, the resultant noise term is no longer white. Hence it is not comparable to AWGN channel. Further, in the Matlab code the BER obtained from simulations are shown to be matching the theoretically expected results.
15 Aug 2008	R Random	@Pillai. I have to admit that you're right. What I forgot is the fact that the additive noise is also divided by the channel.

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Tag Activity for this File
Tag	Applied By	Date/Time
wireless	Krishna Sankar M	22 Oct 2008 10:14:32
ber	Krishna Sankar M	22 Oct 2008 10:14:32
bpsk	Krishna Sankar M	22 Oct 2008 10:14:32
rayleigh	Krishna Sankar M	22 Oct 2008 10:14:32
communications	Krishna Sankar M	22 Oct 2008 10:14:32

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