Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1995-09-28
2000-09-12
Bocure, Tesfaldet
Pulse or digital communications
Spread spectrum
Direct sequence
375142, A61F 206, H04L 2730
Patent
active
061188077
ABSTRACT:
A delay diversity processor for use in receiving direct sequence spread spectrum data utilizes multipath signals to enhance bit synchronization performance by integrating the magnitude of each multipath signal to allow for erratic fluctuations in the multipath signal. As a result, the receiver is less prone to sudden signal strength variation that might trigger erroneous bit resynchronization. The delay diversity processor comprises a first circuit which determines a magnitude value for each of a plurality of correlated signal samples of individual data bits of plural data streams of the received spread spectrum data. A second circuit integrates each of the magnitude values over a period of time corresponding to receipt of a plurality of the individual data bits. The integrated magnitude values provide a measure of confidence of a particular one of the correlated signal samples with respect to remaining ones of the correlated signal samples. The correlated signal sample having the most consistently high measure of confidence is thus most likely to contain reliable and valid data. In an embodiment of the delay diversity processor, the digital delay circuit of the second circuit provides for resetting of the integrated magnitude values within following interruption of receipt of the spread spectrum data. The data values within the digital delay circuit can be reset either to zero, or to a predetermined value. The use of a predetermined value improves the ability of the delay diversity processor to generate valid data following an interruption of the spread spectrum data.
REFERENCES:
patent: 4387465 (1983-06-01), Becker
patent: 5093848 (1992-03-01), Raith
patent: 5230013 (1993-07-01), Hanke et al.
patent: 5237587 (1993-08-01), Schoolcraft
patent: 5241701 (1993-08-01), Andoh
patent: 5263180 (1993-11-01), Hirayama et al.
patent: 5276920 (1994-01-01), Kuisma
patent: 5347536 (1994-09-01), Meehan
patent: 5408504 (1995-04-01), Ostman
patent: 5412620 (1995-05-01), Cafarella et al.
patent: 5422908 (1995-06-01), Schilling
patent: 5535237 (1996-07-01), LaPadula, III et al.
patent: 5633889 (1997-05-01), Schilling
Jovanovich Alan F.
Pergal Frank J.
Warren Bruce G.
Bocure Tesfaldet
Corrielus Jean B.
Intermec IP Corp.
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