Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1998-05-14
2000-11-28
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
375152, H04L 2730
Patent
active
061544876
ABSTRACT:
A spread-spectrum signal receiving method and apparatus in which a correlation operation is performed for obtaining a correlation between a base-band component of a received spread-spectrum signal and a spread code, so as to demodulate the received signal. In the method, a correlation operation between the spread code and the base-band component, and a correlation operation at a timing equal to a timing difference between the spread code and the base-band component in the former correlation operation step, the timing difference being 1/2 of a spread-code interval, are performed. Then, based on results obtained in these correlation operations, a correlation operation result at the timing point where a timing difference between the spread code and the base-band component is less than 1/2 of the spread-code interval, is estimated.
REFERENCES:
patent: 4313170 (1982-01-01), Lewis et al.
patent: 5490165 (1996-02-01), Blakeney, II et al.
patent: 5799010 (1998-08-01), Lomp et al.
patent: 5960028 (1999-09-01), Okamoto et al.
patent: 5999561 (1999-12-01), Naden et al.
Kataoka, N. et al.--"Performance of Soft Decision Digital Matched Filter in Direct-Sequence Spread-Spectrum Communications Systems", IEICE Transactions, vol. E74, No. 5: May 1991: pp. 1115-1121.
Chung, B-Y., et al.--"Performance Analysis of an All-Digital BPSK Direct-Sequence Spread-Spectrum IF Receiver Architecture", IEEE Journal on Selected Areas in Communications, vol. 11, No. 7: Sep. 1993: pp.1096-1107.
Gaudenzi, R, et al.--"Decision-Directed Coherent Delay-Lock Tracking Loop for DS-Spread-Spectrum Signals", IEEE Transactions on Communications, vol. 39, No. 5: May 1991: pp. 758-765.
Gaudenzi, R. et al.--"A Digital Chip Timing Recovery Loop for Band-Limited Direct-Sequence Spread-Spectrum Signals", IEEE Transactions on Communications, vol. 41, No. 11: Nov. 1993: pp. 1760-1769.
Kataoka, N. et al.--"Digitalized Code Tracking Method using Soft Decision Digital Matched Filter in Spread Spectrum Communication Systems", Electronics Information and Communication Convention, RCS91-4: May 1991: pp. 23-30.
Cessna, J. et al.--"Phase Noise and Transient Times for a Binary Quantized Digital Phase-Locked Loop in White Gaussian Noise", IEEE Transactions on Communications, COM-20, No. 2: Apr. 1972: pp. 94-104.
Takakusaki, K. et al.--"Development of Digital Controlled Clock Oscilator for Delay Lock Loop", Electronics Information and Communication Convention, B-371: Mar. 1996: pp. 372.
Hamamoto, N. et al.--"PN-SS Equipment for Satellite Communications with Data Demodulation by Matched Filter", Electronic Communication Society Thesis Magazine, vol. 69-b, No. 11: pp. 1540-1547.
Sawahashi, M. et al.--"Decision-Directed Coherent Delay Locked Loop for DS-CDMA", The Institute of Electronics, Information and Communication Engineers, Technical Report of IEICE, RCS94-150: 1995.02: pp. 13-18.
Turin, George--"Introduction to Spread-Spectrum Antimultipath Techniques and Their Application to Urban Digital Radio", Proceedings of the IEEE, vol. 68, No. 3: Mar. 1980: pp. 328-353.
Murai Hideshi
Tachika Hisao
Chin Stephen
Jiang Lenny
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Spread-spectrum signal receiving method and spread-spectrum sign does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spread-spectrum signal receiving method and spread-spectrum sign, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread-spectrum signal receiving method and spread-spectrum sign will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1732986