Adaptive interference-free spread-spectrum system employing...

Details Adaptive interference-free spread-spectrum system employing... Adaptive interference-free spread-spectrum system employing...

2005-11-08

2005-11-08

Le, Amanda T. (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C370S320000

Reexamination Certificate

active

06963600

ABSTRACT:
A direct sequence spread spectrum system consisting of modulator and demodulator wherein the spreading sequence with zero correlation zone properties, and the despreading consists of multiplying the received signal with the same spreading sequence, followed by a low pass filter, decoder and deinterleaver. The bit rate of the spreading sequence for each user is normally much higher than the input encoded data bit rate, and therefore it spreads the system spectrum.

REFERENCES:
patent: 16733 (1857-03-01), Cha
patent: 5615227 (1997-03-01), Schumacher et al.
patent: 5914943 (1999-06-01), Higuchi et al.
patent: 6009090 (1999-12-01), Oishi et al.
patent: 6041034 (2000-03-01), Fukumasa et al.
patent: 6331997 (2001-12-01), Li
patent: 6452958 (2002-09-01), van Nee
Cha, Jae-sang, A class of multi-level spreading codes with enhanced ZCD property, Department of Information and Communication, SeoKyeong Univ, p. 1-4.
Y. Han, On the Minimization of Overhead in Channel Impulse Response Measurement, IEE Trans. Veh. Technol., vol. 47, No. 2, pp. 631-632, May 1998.
E.J. Cruselles et al., “Spreading Codes Generator for Wireless CDMA Networks”,Wireless Personal Communications, NL, Kluwer Academic Publishers, vol. 7, No. 1, May 1, 1998, pp. 69-86.
M. Tanimoto et al., “Synchronous Spread-Spectrum Multiplex Communication System Using a Modified M-Sequence”,Electronics and Communications in Japan, Jul., 1984, USA, vol. 67, No. 7, pp. 70-77.
J. Wolfmann, “Almost Perfect Autocorrelation Sequences”,IEEE Transactions on Inforamtion Theory, US, IEEE Inc. New York, vol. 38, No. 4, Jul. 1, 1992, pp. 1412-1418.

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