Radio communication apparatus and channel estimating method

Details Radio communication apparatus and channel estimating method Radio communication apparatus and channel estimating method

2007-07-31

2007-07-31

Nguyen, Lee (Department: 2618)

Pulse or digital communications

Equalizers

C375S265000, C455S069000

Reexamination Certificate

active

09933038

ABSTRACT:
Noise generating section106generates noise data of a white Gaussian noise, and noise adding section107adds received data and the noise data. Channel estimating section108performs channel estimation using the added data output from noise adding section107. At this point, when a level of a preceding signal is equal to or less than that of the noise data, channel estimating section108is not capable of detecting the preceding signal. Accordingly, in the case where a received level of a preceding signal is extremely lower than that of a delayed signal and a noise level is further lower than the received level of the preceding signal, it is possible to perform pre-equalization using the delayed signal as a desired signal, whereby it is possible to maintain the reception characteristic of a communication partner.

REFERENCES:
patent: 5357257 (1994-10-01), Nevin
patent: 6714587 (2004-03-01), Van Houtum et al.
Partial English translation of the document “Signal Transmission Performance of Spatial and Temporal Pre-Cording in TDD Mobile Communication Systems” cited in the Information Disclosure Statement of Aug. 21, 2001.
Hiroshi Harashima, et al. “Matched-Transmission Technique for Channels with Intersymbol Interference”, IEEE Transactions on Communications, vol. com -20, No. 4, p. 774-780, Aug. 1972.
Shigeru Tomisato, et al. “Signal Transmission Performance of Spatial and Temporal Pre-Coding in TDD Mobile Communication Systems”, NTT Mobile Communications Network Inc., pp. 540-541, 1998.

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