Control unit for controlling modem used in receiver

Details Control unit for controlling modem used in receiver Control unit for controlling modem used in receiver

1991-07-29

1993-07-13

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375 10, 375108, H04B 346

Patent

active

052280608

ABSTRACT:
A control unit for controlling a modem used in a receiver demodulates a received signal by use of an adaptive equalizer, and a recovery circuit includes a timing recovery function and a carrier recovery function. States regarding operations in the adaptive equalizer and the recovery circuit are updated based on the received signal. The modem includes a determination unit for determining whether or not the modem is operating unusually based on a signal processed in the modem, a buffer for storing state data at a predetermined timing when the determination unit determines that the modem is not operating unusually, and a controller for controlling the adaptive equalizer and the recovery circuit so that the adaptive equalizer and the recovery circuit operate based on the state data which has been stored in the buffer when the determination unit determines that the modem is operating unusually.

REFERENCES:
patent: 4037049 (1977-07-01), Lyon
patent: 4477895 (1984-10-01), Casper et al.
patent: 4514855 (1985-04-01), Lang et al.
patent: 4864557 (1989-09-01), Morton et al.

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