H - Electricity – 04 – W
Patent
H - Electricity
04
W
H04W 24/00 (2009.01) H04B 1/711 (2011.01) H04B 1/712 (2011.01) H04L 1/00 (2006.01) H04B 1/76 (2006.01)
Patent
CA 2727686
In this invention, a channel estimation value of data symbols of a data channel is calculated by weighting and averaging pilot symbols in a parallel time multiplexing method. Also, a channel estimation value of data symbols during each data symbol interval is calculated by dividing data symbols in a slot into a plurality of data symbol intervals, selecting pilot symbols suitable for calculation of a channel estimation value of data symbols during each data symbol interval and weighting and averaging that pilot symbols. Also, a fading frequency is detected based on an inner product value of pilot symbols. Weighting factors are changed based on the detected fading frequency. Also, a channel estimation value is calculated by weighting and averaging pilot signals using a plurality of weighting sequences. The calculated channel estimation value is used to demodulate received data. The output data with the highest quality is selected by judging reliability of these plurality of demodulated data. It is also possible to select some weighting sequences based on the result of the reliability judgment of the demodulated data for predetermined period of time. In this case, after the selection, demodulation is performed by using these selected weighting sequences only.
Ando Hidehiro
Ishikawa Yoshihiro
Okumura Yukihiko
Onoe Seizo
Usuda Masashi
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Ntt Docomo Inc.
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