Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-04-17
2007-04-17
Patel, Jay K. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S136000, C375S137000, C455S296000
Reexamination Certificate
active
09554392
ABSTRACT:
Errors are reduced when tracing PRNS code delay, especially in receivers operating on signals with rather low code frequency (C/A code) under multibeam effect without deterioration or with minimum deterioration of the signal-to-noise ratio. A method of increasing noise immunity during reception of signals from satellite navigational systems and a device for realizing the same includes radio modules, an analog-to-digital converter, a digital correlation device and digital correlators. A discrimination signal is generated with a variable delay of the signal copy with respect to the exact copy. The use of the correcting sequence of gating digital signals makes it possible to eliminate the multipath effect at a delay of the reflected signal larger than 1.5 d and reduces its negative effect starting from a delay value greater than d/2. In this case, the energy losses compared with a pure mode of the narrow correlator are increased only by 1.76 dB.
REFERENCES:
patent: 5495499 (1996-02-01), Fenton et al.
patent: 5781152 (1998-07-01), Renard et al.
patent: 0 552 975 (1993-07-01), None
patent: WO 97/06446 (1997-02-01), None
Zhodzicshsky, Multipath Error Reduction In A Spread Spectrum Receiver For Ranging For Ranging Applications, Feb. 1997, W 97/06446.
Goiser A M J et al Institute of Electrical and Electronics Engineers: “Synchronizing a Digital GPS Receiver” Melecon '96. 8th. Mediterranean Electrotechnical Conference. Industrial Applications in Power Systems, Computer Science and Telecommunications. Bari, IT., May 13-16, 1996, Melecon. Mediterranean Electrotechnical Conference, New York, IEEE, US, vol. vol. II Conf. 8, May 13, 1996, pp. 1043-1046, XP000699435 ISBN: 0-7803-3110-9 Sections I.B, III, IV—.
Fedotov Boris Dmitrievich
Rog Andrey Leonidovich
Samsung Electronics Co., Limited
Zheng Eva
LandOfFree
Method of increasing noise immunity during reception of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of increasing noise immunity during reception of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of increasing noise immunity during reception of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3761652