Abstract
Multi-antenna techniques can be seen as a joint name for a set of techniques with the common theme that they rely on the use of multiple antennas at the receiver and/or the transmitter, in combination with more or less advanced signal processing. Multi-antenna techniques can be used to achieve improved system performance, including improved system capacity (more users per cell) and improved coverage (possibility for larger cells), as well as improved service provisioning, for example, higher per-user data rates. This chapter provides a general theoretical background overview of different multi-antenna techniques applicable to the 3G evolution, including receiver diversity, transmit diversity, and multiple-input multiple-output spatial multiplexing. This overview is built upon in Chapter 11, which describes the standardization of multi-antenna features in HSPA.
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