Multi-antenna transmission
Abstract
Support for efficient multi-antenna transmission techniques is fundamental for any modern communication system to meet the demand of increased data rates from today’s mobile broadband users. Tools for enabling improved and more efficient use of multiple transmit and receive antennas for WCDMA/HSPA have been a key area of research and standardization in 3GPP for many years, and the current standard supports a flexible toolbox to facilitate multi-antenna transmission techniques. This chapter examines in detail the signaling and procedures associated with HSPA multi-antenna features, including downlink Tx diversity, two-branch MIMO, and four-branch MIMO, as well as uplink closed- and open-loop Tx ...
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