Multi-user data transmission/reception system and mode...

Multiplex communications – Generalized orthogonal or special mathematical techniques

Reexamination Certificate

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Details

C370S208000, C370S329000, C455S069000, C455S501000, C375S260000

Reexamination Certificate

active

07916620

ABSTRACT:
A multi-user data transmission/reception system includes at least one mobile station to receive a pilot signal, select a preferred mode, a preceding matrix index, a beamforming vector index, and a quantized capacity level using the pilot signal, and transmit the preferred mode, the precoding matrix index, the beamforming vector index, and the quantized capacity level; and a base station to transmit the pilot signal to the at least one mobile station, receive the preferred mode, the precoding matrix index, the beamforming vector index, and the quantized capacity level from the at least one mobile station, and determine an optimal mode, an optimal precoding matrix, and an optimal beamforming vector using a lookup table storing an expected capacity for each capacity quantization interval.

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Khaled et al, Quantized Multi-Mode Precoding for Spatial Multiplexing MIMO-OFDM Systems, 2005 IEEE, pp. 867-871.

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