Error correction of MSK signals dependent on sample quality

Details Error correction of MSK signals dependent on sample quality Error correction of MSK signals dependent on sample quality

1994-09-19

1996-12-10

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375305, 375336, 329300, 332100, 371 44, H04L 2710

Patent

active

055838901

ABSTRACT:
A method and corresponding apparatus for error correction of MSK-coded data receives a signal (101) partitionable into adjacent frames (111,113) each subdividable into three tridents (103, 105, 107). A first sample quality metric (225) applicable to a p (123) of the signal (101) associated with a last trident (107) of the tridents of a first frame (111) of the adjacent frames (111, 113) is synthesized, and a second sample quality metric (227) applicable to a portion (125) of the signal (101) associated with a first trident (103') of the tridents of a second frame (113) following the first frame (111) is synthesized. Each of the first and second sample quality metrics (225, 227) have a magnitude dependent on a time that the associated portion (123) of the signal (101) has a magnitude exceeding an average magnitude (127) of the signal (101). A corrected polarity (113) of the portion of the signal (101) associated with the last trident (107) of the tridents of the first frame (111) is determined dependent on a sample quality metric having a greater magnitude of the first sample quality metric (225) and the second sample quality metric (227).

REFERENCES:
patent: 4359692 (1982-11-01), Ryan
patent: 4669095 (1987-05-01), Hall
patent: 4715048 (1987-12-01), Masamura
patent: 5048058 (1991-09-01), Kaleh
patent: 5425058 (1995-07-01), Mui

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