Pulse or digital communications – Repeaters – Testing
Patent
1997-06-05
1999-03-09
Pham, Chi H.
Pulse or digital communications
Repeaters
Testing
375209, 375319, 375260, H04B 1500, H04K 100, H04L 2730
Patent
active
058810960
ABSTRACT:
There is disclosed in a frequency hopping digital communications system having a transmitter for transmitting a data signal via a noisy transmission path, and a receiver responsive to the transmitted signal for receiving the same, a method for removing bias in the data signal at the receiver comprising the steps of: forming a sample amplitude histogram from the received data signal samples for a given hop frequency; correlating the amplitude histogram against a stored reference amplitude histogram to obtain a correlated output signal having a peak correlation position; determining the position difference between the peak correlation position and the correlation center position to provide an offset signal corresponding to the difference and indicative of an estimated bias offset value; and applying the estimated bias offset value to the received signal samples in response to the offset signal to obtain an output signal indicative of an unbiased received data signal.
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Bertrand John
Blois Gary V.
Epstein Marvin A.
Fine Joseph M.
Majkrzak Bryan S.
Bayard Emmanuel
ITT Manufacturing Enterprises Inc.
Pham Chi H.
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