Method and apparatus for acquiring peak and valley values of a s

Details Method and apparatus for acquiring peak and valley values of a s Method and apparatus for acquiring peak and valley values of a s

1996-01-11

1999-07-27

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375317, H04L 2706

Patent

active

059303077

ABSTRACT:
A radio communication device (100) for tracking peaks and valleys of a signal received by a receiver (110) includes tracking circuitry (115) for approximating the peaks and valleys by attacking and decaying values stored in peak and valley counters (124, 132). When the tracking circuitry (115) is in a fast track mode, a peak/valley controller (120) decays a stored value by a first amount when the stored value exceeds a sampled signal voltage and attacks the stored value by a second amount when the stored value does not exceed the sampled signal voltage. The first amount is greater than the second amount. Preferably, the counters (124, 132) are eight-bit counters, the first amount equals eight, and the second amount equals four.

REFERENCES:
patent: 4631737 (1986-12-01), Davis et al.
patent: 5303416 (1994-04-01), Morera
patent: 5311554 (1994-05-01), Morera et al.
patent: 5394441 (1995-02-01), Morera et al.
patent: 5566213 (1996-10-01), Carsello
patent: 5627860 (1997-05-01), McKinny et al.

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