Multiantenna capacity: Myths and realities

Angel Lozano, Antonia M. Tulino, Sergio Verdu

Research output: Chapter in Book/Report/Conference proceedingChapter

16 Scopus citations


Over the last decade, the increases in capacity promised by multiantenna communication techniques have spurred many information-theoretic analyses. Furthermore, information theory has been used as a design tool to optimize the signals fed to the transmit array and to motivate signal processing strategies at the receiver. In this chapter, we catalog a number of misconceptions that have arisen in the multiantenna literature. The focus is on information-theoretic results and their interpretations, rather than on the validity of the various modeling assumptions. After some introductory material, we address several misconceptions about optimum signaling and about the impact of model features, such as antenna correlation, line-of-sight components, and intercell interference. Particular attention is given to the low- and high-power regions. We also briefly touch upon the relationship of the capacity results with some practical transmit and receive architectures. The chapter deals mostly, but not exclusively, with coherent communication. Definitions Denoting by the number of transmit and receive antennas, respectively, we shall abide by the frequency-flat complex vector model where is a deterministic scalar that represents the average channel gain, while the random matrix H is normalized to satisfy While the distribution of H is known to both transmitter and receiver, we shall specify when its realization is known to either.

Original languageEnglish (US)
Title of host publicationSpace-Time Wireless Systems
Subtitle of host publicationFrom Array Processing to MIMO Communications
PublisherCambridge University Press
Number of pages21
ISBN (Electronic)9780511616815
ISBN (Print)9780521851053
StatePublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

  • General Engineering


Dive into the research topics of 'Multiantenna capacity: Myths and realities'. Together they form a unique fingerprint.

Cite this