Digital signal quality evaluation circuit using synchronization

Details Digital signal quality evaluation circuit using synchronization Digital signal quality evaluation circuit using synchronization

1989-12-21

1991-10-01

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375114, 375116, H04B 346

Patent

active

050540351

ABSTRACT:
In evaluating the quality of received digital signals in terminals of a mobile communication system, the bit error rate is measured. Each station receives signals in successive data frames which includes a synchronization pattern and stores a version of the synchronization pattern. The received synchronization pattern is compared to the stored synchronization pattern to derive a signal representative of the received signal quality. The quality signal may then be used for hand-off to other base stations or other call transfers. Since the synchronization pattern is included in each data frame, measuring signal quality therefrom obviates the need for system generation and interpretation of special quality messages.

REFERENCES:
patent: 3699261 (1972-10-01), Tomozawa
patent: 4596981 (1986-06-01), Ueno et al.
patent: 4694473 (1987-09-01), Etoh
patent: 4807248 (1989-02-01), Pyatt et al.
patent: 4807261 (1989-02-01), Johnson
patent: 4899383 (1990-02-01), Einolf, Jr. et al.

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