Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1996-07-31
1998-03-10
Chin, Stephen
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375341, 375325, H04L 2706, H03D 100
Patent
active
057270287
ABSTRACT:
The apparatus includes a demodulator (70) responsive to a first received symbol (68) associated with a first transmitted symbol (39). The demodulator has a plurality of outputs (72) and produces a first set of outputs (99). The demodulator (70) is also responsive to a second received symbol (68) associated with a second transmitted symbol (39), and produces a second set of outputs (99). A coherent detector (100) receives some outputs from the first set of outputs (99), producing an estimate of the first transmitted symbol. The coherent detector also receives some outputs from the second set of outputs (99), producing an estimate of the second transmitted symbol. A first energy value (135) and an index (101) are associated with the first estimate, while a second energy value (135) is associated with the second estimate. A averaging circuit (150), which determines an average of the first energy value (135) and the second energy value (135) to produce an average energy value (140), is responsive to the coherent detector (100). A first combiner (130) is responsive to the coherent detector (100), combining the index (101) and the first energy value (135) to produce a weighted index (131). A second combiner (133) is responsive to the averaging circuit (150) and is also responsive to the first combiner (130), combining the weighted index (131) and the average energy value (140) to produce a channel-coded index (141). A deinterleaver (80) is responsive to the second combiner (133), receiving the channel-coded index (141).
REFERENCES:
patent: 5191598 (1993-03-01), Backstrom et al.
patent: 5581580 (1996-12-01), Lindbom et al.
patent: 5596607 (1997-01-01), Larsson et al.
R. Walton and M. Wallace, "Near Maximum Likelihood Demodulation for M-ary
Ghosh Amitava
Rohani Kamyar
Chin Stephen
Creps Heather L.
Motorola Inc.
Phan Hai H.
LandOfFree
Method and apparatus for receiving a signal in a digital radio f does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for receiving a signal in a digital radio f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for receiving a signal in a digital radio f will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-146298