Receiving apparatus and demodulating method

Details Receiving apparatus and demodulating method Receiving apparatus and demodulating method

2006-03-22

2009-12-29

Payne, David C (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

07639753

ABSTRACT:
Receiving-apparatus employed in MIMO-system includes space-filtering-unit configured to separate receive-signals to signal of first-data-sequence and signal of second-data-sequence on basis of estimation result, provisional-decoding-unit configured to LDPC-decode signal of first-data-sequence and signal of second-data-sequence with check-matrices which is modified in different-forms by fundamental-row-operation from each other, to obtain provisional-likelihood-ratio for first-data-sequence and second-data-sequence, provisional-output-unit configured to output provisional-first-data-sequence and provisional-second-data-sequence on the basis of provisional-likelihood-ratio for first-data-sequence and second-data-sequence respectively, replica-signal-generation-unit configured to generate replica-signal, on basis of provisional-first-data-sequence and provisional-second-data-sequence and estimation-result of propagation-path-estimation-unit, soft-decision-outputting-unit configured to obtain receive-likelihood-values of first-data-sequence and second-data-sequence, on basis of residual-signal obtained by subtracting replica-signal from receive-signals, actual-decoding-unit configured to LDPC-decode receive-likelihood-values, by using the check-matrices, to obtain likelihood-ratio of first-data-sequence and likelihood-ratio of second-data-sequence, and actual-output-unit configured to obtain first-data-sequence and second-data-sequence on the basis of likelihood-ratio of first-data-sequence generated by the actual-decoding-unit and likelihood-ratio of second-data-sequence to hard-decision.

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Won-Joon Choi, et al., “Iterative Soft Interference Cancellation for Multiple Antenna Systems”, IEEE Wireless Communications and Networking Conference, vol. 1, Sep. 2000, pp. 304-309.
P. W. Wolniansky, et al. “V-Blast: An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel”, Proceeding of ISSSE-98, Pisa, Italy, Sep. 29, 1998, 6 Pages.
Kiyotaka Kobayashi, et al., “Varying Interleave Patterns with Iterative Decoding for Improved Performance in Mimo Systems”, Personal Indoor and Mobile Radio Communications PIMRC, IEEE, vol. 2, 2004, pp. 1429-1433.

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