Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2006-07-11
2006-07-11
Fan, Chieh M. (Department: 2634)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S316000, C375S147000, C375S354000
Reexamination Certificate
active
07076015
ABSTRACT:
A method is provided of detecting one of a set of preamble sequences in a spread signal. The method includes: (a) correlating the received spread signal with sequences of a first orthogonal Gold code (OGC) set in accordance with a first fast transform to provide a preamble signal; (b) correlating the preamble signal with the set of preamble sequences in accordance with a second fast transform to generate a set of index values; (c) forming a decision statistic based on the set of index values: and (d) selecting, as the detected one of the set of preamble sequences, a preamble sequence corresponding to the decision statistic. Step (c) comprises the steps of: 1) forming an initial decision statistic based on the relative maximum index of the set of index values; 2) selecting the signal generated by the preamble sequence combined with the preamble signal corresponding to the initial decision statistic; 3) adjusting, in one or more of amplitude and phase, the signal selected in step 2); and 4) forming the decision statistic based on the adjusted signal.
REFERENCES:
patent: 5267271 (1993-11-01), Rice
patent: 5463657 (1995-10-01), Rice
patent: 5598429 (1997-01-01), Marshall
patent: 5638376 (1997-06-01), Miki et al.
patent: 5761239 (1998-06-01), Gold et al.
patent: 5909471 (1999-06-01), Yun
patent: 5949817 (1999-09-01), Marshall
patent: 5953370 (1999-09-01), Durrant et al.
patent: 6381229 (2002-04-01), Narvinger et al.
patent: WO 98/332920 (1998-07-01), None
patent: WO 99/60729 (1999-11-01), None
Slonneger et al, “Noncoherent Parallel Acquistion of Pn Sequences in Direct-Sequence Spread-Spectrum Systems”, IEEE Second International Symposium on Spread Spectrum Techniques and Applications, Nov. 29-Dec. 2, 1992, pp.: 31-34.
Chawla et al, “Parallel acquisition of PN sequence in DS/SS systems”, IEEE Transactions on Communications, vol.: 42, Issue: 5, May 1994, pp.: 2155-2164.
Gibson, Jerry D., “The Communications Handbook”, CRC Press, 1997, pp. 94-106.
E.E. Sutter, “The Fast m-Transform: A Fast Computation Of Cross-Correlations With Binary m-Sequences*” “Siam Journal On Computing” Aug. 1991, vol. No. 4, pp. 686-694.
Monroe, Robert, et al “Preamble Code Structure And Detection Method And Apparatus” Database TXTUS2 Online! Us5987079 Nov. 16, 1999, claims 1, 3-7.
European Search Report, dated Jul. 28, 2000.
TSG-RAN Working Group 1 meeting #3 Ericsson, “New RACH Preambles With Low Auto-Correlation Sidelobes and Reduced Detector Complexity”, Mar. 22-26, 1999.
Bhatoolaul David Lahiri
Monogioudis Pantelis
Fan Chieh M.
Lucent Technologies - Inc.
Perilla Jason M.
Rosenthal E. J.
Sarup D. A.
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