How to Fully Exploit the Degrees of Freedom in the Downlink of MISO Systems With Opportunistic Beamforming

2008/09/03 by Minghua Xia, Xia, Minghua, Wenkun Wen +3
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Techniques #Cooperative Communication and Network Coding #FOS: Computer and information sciences #Information Theory (cs.IT)

paper · pdf · doi:10.48550/arxiv.0809.0536

openalex publication_date 2008/09/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The opportunistic beamforming in the downlink of multiple-input single-output (MISO) systems forms N transmit beams, usually, no more than the number of transmit antennas N_t. However, the degrees of freedom in this downlink is as large as N_t². That is, at most N_t² rather than only N_t users can be simultaneously transmitted and thus the scheduling latency can be significantly reduced. In this paper, we focus on the opportunistic beamforming schemes with N_t

Citations

• An Overview of MIMO Communications—A Key to Gigabit Wireless

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