Practical implementation of jointly designed transmit receive space-time IIR filters
نویسندگان
چکیده
The study of joint transmit-receive design over multi-input multioutput (MIMO) channels representing a wireless channel with spatial diversity at both ends is nowadays receiving a signi cant attention. The theoretical closed-form solutions obtained so far are given in the continuous-frequency domain corresponding in general to IIR lters. When those lters are to be implemented in a discrete-time domain, FIR lters are highly desired for many reasons. In a realistic implementation, the lter order is generally constrained to a few taps for computational reasons. In this paper, we propose practical approximations of the IIR lters using FIR lters constrained to a few taps by ef ciently utilizing the degrees of freedom inherent to the lter solutions, i.e., the possibility of freely choosing arbitrary phases appearing in the structure of the lters.
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