Method to determine transmission quality

Details Method to determine transmission quality Method to determine transmission quality

1991-06-05

1993-05-25

Schreyer, Stafford

Telephonic communications

Audio message storage, retrieval, or synthesis

371 51, 455 331, H04B 700

Patent

active

052146871

ABSTRACT:
A method determines the transmission quality of a signal transmitted by a base station and received by a mobile station in a cellular digital radio telephone network. The mobile station determines the phase error of detected bits a the input of the channel decoder, calculates the average and variance of the phase error. The average and variance are used to calculate the S/N ratio. The S/N ratio information is transmitted to a base station which converts the S/N ratio to a value defining the BER estimate of the received signal.

REFERENCES:
patent: 5067171 (1991-11-01), Kawano
patent: 5142695 (1992-08-01), Roberts et al.

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