Tap-weight controller for adaptive matched filter receiver

Details Tap-weight controller for adaptive matched filter receiver Tap-weight controller for adaptive matched filter receiver

1992-12-28

1994-10-04

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

36472416, H03H 730

Patent

active

053533062

ABSTRACT:
In an adaptive matched filter with a decision feedback equalizer (DFE), a tap-weight controller of the matched filter includes a tapped delay line having a series of delay elements for receiving an incoming digital signal to produce successively delayed signals at successive taps of the delay line so that the signal at the center tap coincides with an output of the DFE. Cross-correlators are associated respectively with tap-weight multipliers of the matched filter. In each cross-correlator, cross-correlation is detected between a digital sample from the DFE and a delayed version of the corresponding digital sample. An average value is taken of the cross-correlation to produce higher significant bits of a tap-weight coefficient for the corresponding tap-weight multiplier. The most significant bit of the output of the higher significant bits is inverted and a group of bits is produced, each having the same binary value as the inverted most significant bit. The group of bits is supplied to the corresponding tap-weight multiplier as lower significant bits of the tap-weight coefficient.

REFERENCES:
patent: 3792356 (1974-02-01), Kobayashi et al.
patent: 4550415 (1985-10-01), Debus, Jr. et al.
patent: 5230006 (1993-07-01), Kurokami

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