A Study on Frequency-domain Division Based on Channel Equalization
Xiuchun Wang · Modern Radar · 2011
In frequency-domain channel equalization,one of the most crucial technologies is to seek the response of an equalization filter.According to the relation between the circular convolution in the time domain and the DFT product in the frequency domain,it is referred that two classes of algorithms on frequency-domain division in channel equalization,one class is time-domain algorithms which include an algorithm to seek the pseudo-inverse of a circular matrix and another algorithm to seek the deconvolution by circular convolution,the other is a frequency-domain algorithm having the least MSRe with matrix form.According to the error with the convolution between the filter to be emended and the corresponding equalization filter approximating the reference filter,the validity of the above algorithms is tested.The experimental results shows that the frequency-domain algorithm having the least MSRe with matrix form excels those two time-domain algorithms in both approximation degree and real time.