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3G Evolution, 2nd Edition by Per Beming, Johan Skold, Stefan Parkvall, Erik Dahlman

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Chapter 12. HSPA Evolution

Although HSPA as defined in Release 6 is a significant enhancement to the packet-data functionality in WCDMA, the performance is further enhanced in Release 7 and beyond. Herein, this is referred to as ‘HSPA Evolution’ and consists of both the introduction of new major features, such as MIMO, and many smaller improvements to existing structures which, when taken together as a package, represents a major increase in performance and capabilities. In the following sections, some of these enhancements are discussed.

12.1. MIMO

MIMO is one of the major new features in Release 7, introduced to increase the peak data rates through multi-stream transmission. Strictly speaking, MIMO, Multiple Input Multiple Output, in its general ...

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