Pulse or digital communications – Receivers – Angle modulation
Patent
1995-09-01
1996-11-05
Chin, Stephen
Pulse or digital communications
Receivers
Angle modulation
H04L 2714
Patent
active
055725511
ABSTRACT:
An arrangement for acquiring an input signal has a complex multiplier (30) which receives two staggered channels (42I and 42Q). The first channel is delayed (31). A phase error estimator (22) then estimates the error in each of the channels. Another delay (23) re-introduces the delay between the two channels. Another complex multiplier (24) produces the output (34I and 34Q) which is fed-back to complex multiplier (30).
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An article entitled "A Differential Offset-QPSK Modulation/Demodulation Technique for Point-to-Multipoint Radio Systems". by Tho Le-Ngoc, Concordia University, Department of Electrical and Computer Engineering and SR Telecom Inc., Laurent, P.Q., Canada, .COPYRGT.1987, IEEE.
An article entitled "A TDMA Satellite Communication System for ISDN Services-QPSK Burst Modem Coupled with High Coding Gain FEC-" by S. Kato et al., NTT Radio Communication Systems Laboratories, Yokosuka, Japan, .COPYRGT.1991, IEEE. pp. 1533-1541.
Kallman Kurt A.
Kearney Brian P.
Bogacz Frank J.
Chin Stephen
Kim Kevin
Motorola Inc.
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