On Precoder Design under Maximum-Likelihood Detection for Quasi-Stationary MIMO Channels

We consider the problem of constructing linear precoders for quasi-stationary multiple-input multiple-output channels. Maximum-likelihood detection is assumed and the objective of the precoding is to maximize the minimum Euclidean distance of the signaling. Since the channel remains constant for some time, the precoding is performed spatially as well as across time. As will be shown, the precoder design is tightly connected to the theory of partial response signaling and precoders can be designed by usage of existing methods. The decoding complexity will be controlled and can be maintained small.