Digital transmultiplexer with automatic threshold controller

Details Digital transmultiplexer with automatic threshold controller Digital transmultiplexer with automatic threshold controller

H - Electricity

04

J

363/8

H04J 1/02 (2006.01) H03M 1/06 (2006.01) H04L 5/06 (2006.01) H03M 1/12 (2006.01)

Patent

CA 1333943

A group demodulator for FDMA/PSK input signals comprising a down-converter for the input signals to convert these signals into in-phase and quadrature-related signals which are applied through analog-to-digital converters to a digital transmultiplexer. The digital transmultiplexer converts the signals into a number of channels of PSK modulated data. The output of each analog-to-digital converter is applied to an automatic threshold controller whose output provides an analog reference signal which is applied to a reference input of the associated analog-to-digital converter. The reference signal corrects any DC offset error for the analog-to-digital converter and prevents degradation in energy per bit-to-noise density ratio.

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