Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1992-12-30
1997-10-14
Chin, Wellington
Pulse or digital communications
Receivers
Interference or noise reduction
375231, 375232, 3647242, 3647241, H03H 730
Patent
active
056779348
ABSTRACT:
A digital radio communications system includes a receiver that detects a signal stream comprising data frames interspersed with synchronizing signal sequences. The receiver includes multipath propagation compensating circuitry which the receiver selectively employs by use of a method that comprises the steps of: operating the multipath compensation circuitry to respond to a received signal string and provide a compensated signal train output; deriving a first signal quality estimate for the compensated signal train; disabling the compensated signal train output when the first signal quality estimate reaches a determined level; and detecting a remaining portion of the signal stream without multipath propagation compensation. In one version, the disabling step occurs when the first signal quality estimate reaches a predetermined threshold. In another version, a second signal quality estimate is derived for a noncompensated portion of the signal stream and when the second signal quality estimate exceeds the first signal quality estimate, the multipath propagation compensation circuitry is disabled. In still another version of the invention, multipath propagation compensation circuitry is initialized using several synchronizing sequences so as to achieve improved data recovery from an incoming signal.
REFERENCES:
patent: 5050186 (1991-09-01), Gurcan et al.
patent: 5195106 (1993-03-01), Kazecki et al.
patent: 5212803 (1993-05-01), Uddenfeldt et al.
patent: 5214391 (1993-05-01), Serizawa et al.
patent: 5230077 (1993-07-01), Raith
patent: 5257265 (1993-10-01), Su et al.
patent: 5263026 (1993-11-01), Parr et al.
Chin Wellington
Corrielus Jean B.
Nokia Mobile Phones Limited
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