Precoding with multi-user codebooks

Details Precoding with multi-user codebooks Precoding with multi-user codebooks

2011-08-09

2011-08-09

Scheibel, Robert C (Department: 2467)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S437000, C370S465000

Reexamination Certificate

active

07995528

ABSTRACT:
A cellular system utilizes different codebooks of precoding vectors for different receivers within a particular cell. A set of different codebooks is designed and then used by a base station as a basis to allocate to various receivers in a dynamic fashion. In at least some embodiments, the codebooks are designed to be non-overlapping in angular space. For example, codebooks can be designed to be generally orthogonal to one another thereby increasing the separation between receivers that use the different codebooks. In at least some embodiments, codebooks can be allocated responsive to a determination that two or more receivers are geographically proximate one another in a manner which would permit an undesirable amount of interference. In yet other embodiments, codebooks can be allocated in a more random fashion.

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