Pulse or digital communications – Multilevel
Patent
1997-06-02
1998-08-25
Chin, Wellington
Pulse or digital communications
Multilevel
375334, 375360, 329300, 329302, H04L 2534
Patent
active
057990433
ABSTRACT:
A selective call unit (800) comprising a receiver (100) and a processor (810) is used for decoding a 2-level radio signal. The processor (810) is adapted to convert in-phase and quadrature signals generated by the receiver (100) to a sequence of state transitions representative of the plurality of symbols. For each symbol in the plurality of symbols, the processor (810) counts the sequence of state transitions during a symbol period, and compares the recorded count to a predetermined threshold, thereby generating a comparison result. The processor (810) then calculates a bit decision threshold level based on an average of the comparison result for each symbol in the plurality of symbols. For each symbol in a plurality of subsequent symbols, the processor (810) then compares the bit decision threshold level to the sequence of state transitions counted during a symbol period to decode a digital logic level therefrom.
REFERENCES:
patent: 4379284 (1983-04-01), Boykin
patent: 5453715 (1995-09-01), Lee
patent: 5640428 (1997-06-01), Abe et al.
patent: 5724001 (1998-03-01), Chang
patent: 5745530 (1998-04-01), Back et al.
Chang Chun-Ye Susan
Powell, II Clinton C.
Webster James Rodney
Chin Wellington
Guntin Eduardo
Motorola Inc.
Tran Congvan
LandOfFree
Method and apparatus for decoding a two-level radio signal 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 decoding a two-level radio signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for decoding a two-level radio signal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-41748