Method of calculating log-likelihood ratio and method of...

Details Method of calculating log-likelihood ratio and method of... Method of calculating log-likelihood ratio and method of...

2008-06-18

2011-10-11

Ha, Dac (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S262000, C375S340000, C714S794000, C714S795000

Reexamination Certificate

active

08036322

ABSTRACT:
The present invention relates to a method of calculating a log-likelihood ratio and a method of detecting a transmission signal. According to the present invention, when a transmission symbol candidate vector is detected on the basis of a received signal, a threshold value and an ML metric of each transmission symbol candidate vector are calculated and the ML metric that is larger than the threshold value is updated by the threshold value. Further, a log-likelihood ratio of the transmission signal bit is calculated using the updated ML metric and the threshold value, and a transmission signal is detected using the log-likelihood ratio.

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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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