Log likelihood ratio calculation method, transmit signal...

Details Log likelihood ratio calculation method, transmit signal... Log likelihood ratio calculation method, transmit signal...

2008-06-19

2011-10-18

Payne, David (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S316000

Reexamination Certificate

active

08040980

ABSTRACT:
The present invention relates to a log-likelihood ratio calculation method, a transmitting signal detection method, and a receiver. The present invention estimates a channel on the basis of the received signal and rearranges a plurality of layers. Further, at the time of rearrangement of the layers, a symbol of a layer having the lowest reliability is considered for every constellation dot, and the successive interference for the remaining layers is removed corresponding to the constellation dots of the layer having the lowest reliability to set the transmitting symbol candidate vector. Furthermore, a log-likelihood ratio for every bit of the plurality of layers is calculated using the transmitting symbol candidate vector to decode the channel.

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Kawai et al., Likelihood Function for QRM-MLD Suitable for Soft-Decision Turbo Decoding and Its Performance for OFCDM MIMO Multiplexing in Multipath Fading Channel, Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications, Jan. 2005, pp. 47-57, IEICE Trans. Commun., vol. E88, No. 1.

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