Fast equalization acquisition for automatic adaptive digital mod

Details Fast equalization acquisition for automatic adaptive digital mod Fast equalization acquisition for automatic adaptive digital mod

1974-09-09

1976-01-27

Mayer, Albert J.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

325 42, 333 18, H04B 110

Patent

active

039355357

ABSTRACT:
A transmitter transmits data through a communication channel to a receiver and the communication channel provides the data with delay and attenuation distortion. The receiver includes an equalization network having taps with multiplying coefficients for correcting the delay and attenuation distortion of the data. In response to a special sequence of the data, either specially generated by the transmitter or detected in random data, the receiver generates signals for updating the multiplying coefficients of the taps and these signals are introduced to the equalization network through a gate enabled by a special sequence detection network. This apparatus provides for the adjustment of the equalization taps in an extremely short period of time such as 5.83 milliseconds.

REFERENCES:
patent: 3787762 (1974-01-01), Sato

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