Blind OFDM Channel Estimation Using FIR Constraints

Hi everyone,

im currently involved in some research concerning blind channel estimation in ofdm systems. Within this intercourse i stumbled upon the paper

"Blind OFDM Channel Estimation Using FIR Constraints: Reduced Complexity and Identifiability"
(link http://www.ifp.illinois.edu/~singer/journalpapers/SongSinger07.pdf)

, which describes a Finite Alphabet based Algorithm (in paper called RMD-Algorithm) exploiting the FIR-constraints of the channel impulse response. I implemented the algorithm and tried to come up with the same simulation results as presented in the paper. This turned out to be a difficult task for me and i have not been able to achieve this. Now my question: Has anyone of you ever worked with this algorithm or has even implemented it? If so, would you be able to share your code with me or maybe take a look at my code in order to find the error?

In the paper they use a 4-Tap unit FIR channel, with gaussian taps that are identically distributed and mutually independent. Furthermore the simulated channels are unit energy channels (E[h'*h] = 1). I imlemented this the following way:

mfChannelTaps = (sqrt(2)/4)*randn(4,1)+1i*randn(4,1)).';

Is this implementation correct?

Thank you very much in advance, hope to hear from you..any help is appreciated. Start a New Thread