Linear and Dirty-Paper Techniques for the Multi-User MIMO Downlink
نویسندگان
چکیده
Multi-input, multi-output (MIMO) communications systems have attracted considerable attention over the past decade, mostly for single-user, point-to-point scenarios. The multipleuser MIMO case has attracted less attention, and most of the research on this problem has focused on uplink communications. Only recently has the multi-user MIMO downlink been addressed, beginning with information-theoretic capacity results [1–5], and followed by practical implementations, including those based on linear techniques [6, 7] and non-linear precoding [8–11]. In this chapter we review these techniques and discuss some important open problems.
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