Wireless mobile communication system without pilot signals

Details Wireless mobile communication system without pilot signals Wireless mobile communication system without pilot signals

2011-07-26

2011-07-26

Lam, Kenneth (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S260000, C375S259000, C375S219000, C375S316000, C375S295000, C370S206000, C455S060000

Reexamination Certificate

active

07986740

ABSTRACT:
Method and system for allowing abandoning pilot signals use and for increasing the immunity to Doppler Effect influence in OFDMA based wireless mobile communication systems and as a result, make them more efficient. This is carried out by transmitting N orthogonal I and Q values of symbols, N times on N frequencies, where N is a power of two. In order to be able to select the desired signal from a mixture of N signals, signs of symbol of each signal vary according to one of N-order Walsh functions.

REFERENCES:
patent: 5577025 (1996-11-01), Skinner et al.
patent: 5619524 (1997-04-01), Ling et al.
patent: 5691974 (1997-11-01), Zehavi et al.
patent: 7133352 (2006-11-01), Hadad
patent: 2002/0136276 (2002-09-01), Franceschini et al.
patent: 2006/0067413 (2006-03-01), Tsai

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