Method of reducing the variance of the signal-to-noise rate...

Details Method of reducing the variance of the signal-to-noise rate... Method of reducing the variance of the signal-to-noise rate...

2005-11-22

2008-10-07

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S348000, C375S269000, C375S340000, C329S319000, C329S320000

Reexamination Certificate

active

07433428

ABSTRACT:
This method reduces the variance of the estimation of the signal-to-noise rate in a multiuser digital communications system. These communications require a sending of a phase reference symbol prior to sending a information, where the estimation is made of the signal-to-noise rate in order to use a modulation with a maximum number of bits per symbol, maintaining a bit error probability in reception within certain given margins. The method minimizes and equalizes the variance of the samples obtained for the different values, even and odd of bits per carrier, which the system uses. The estimation is necessary for selecting the number of bits per carrier in order to be adapted to the channel and as back-up information in the event of using a receiver with diversity.

REFERENCES:
patent: 6735264 (2004-05-01), Miller
patent: 2004/0142728 (2004-07-01), Tari et al.
patent: 2004/0197103 (2004-10-01), Roberts et al.

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