Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2004-05-06
2008-03-25
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S343000, C375S326000, C375S147000, C375S150000
Reexamination Certificate
active
07349464
ABSTRACT:
A receiver includes a channel-matched-filter for outputting a Rake-combining result from a digital spread spectrum signal; a carrier recovery circuit which removes an offset of a carrier wave from the combining result; a correlation circuit which detects correlation; a symbol timing detection circuit which extracts a symbol from the correlation; a symbol determination circuit which regenerates data from the symbol; a framer circuit which discriminates a frame configuration; and a symbol timing recovery circuit which generates a timing phase for each of symbol timings. The channel-matched-filter performs multi-phasing compensation and, in accordance with a timing phase from the symbol timing recovery circuit, performs synchronization tracking.
REFERENCES:
patent: 4017798 (1977-04-01), Gordy et al.
patent: 5361276 (1994-11-01), Subramanian
patent: 5909462 (1999-06-01), Kamerman et al.
patent: 5991330 (1999-11-01), Dahlman et al.
patent: 6266361 (2001-07-01), Huang et al.
patent: 6317454 (2001-11-01), Mamori
patent: 2004/0088609 (2004-05-01), Eckhardt et al.
patent: 7-312571 (1995-11-01), None
patent: 9-107310 (1997-04-01), None
“A coherent spread-spectrum RAKE-receiver with maximum-likelihood frequency estimation” Fawer, Urs; Communications, 1992. ICC 92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications. IEEE International Conference on.
“CDMA code synchronization using segmented matched filter with accumulation and best match selection” Persson, Ben; MILCOM 2002. Proceedingsvol. 2, Oct. 7-10, 2002 pp. 976-981 vol. 2.
Floyd M. Gardner “A BPSK/QPSK Timing-Error Detector for Sampled Receivers”, (IEEE Transactions on Communications, vol. Com-34, No. 5, pp. 423-429, May 1986).
Floyd M. Gardner “Interpolation in Digital Modems Part I Fundamentals”, (IEEE Transactions on Communications, vol. 41, No. 3, Mar. 1993).
Lars Erup, et al. “Interpolation in Digital Modems Part II Implementation and Performance” (IEEE Transactions on Communications, vol. 41, No. 3, Mar. 1993).
Liu Shuwang
Neff Michael R
Nixon & Peabody LLP
Oki Electric Industry Co. Ltd.
Studebaker Donald R.
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