Spread spectrum pulse position modulation communication system

Details Spread spectrum pulse position modulation communication system Spread spectrum pulse position modulation communication system

1997-08-07

2000-04-25

Le, Amanda T.

Pulse or digital communications

Repeaters

Testing

375208, 375239, 370213, H04K 102

Patent

active

060552662

ABSTRACT:
A first spread spectrum pulse position modulated signal with a pseudonoise code is generated. A second spread spectrum pulse position modulated signal with an inverted pseudonoise code is generated. A third spread spectrum pulse position modulated signal with a pseudonoise code is generated. A fourth spread spectrum pulse position modulated signal with an inverted pseudonoise code is generated. The first and second spread spectrum pulse position modulated signals are added together and thus a fifth spread spectrum pulse position modulated signal is formed. The third and fourth spread spectrum pulse position modulated signals are added together and thus a sixth spread spectrum pulse position modulated signal is formed. Quadrature modulation is performed on the fifth and sixth spread spectrum pulse position modulated signals.

REFERENCES:
patent: 5216693 (1993-06-01), Nakamura
patent: 5303258 (1994-04-01), Nakamura
patent: 5438589 (1995-08-01), Nakamura
patent: 5469469 (1995-11-01), Haines
patent: 5596601 (1997-01-01), Bar-David
patent: 5706428 (1998-01-01), Boer et al.
patent: 5859870 (1999-01-01), Tsujimoto
Isao Okazaki, et al. "A Study on Multiplexing of Spread-Spectrum Pulse Position Modulation", SST91-18, May, 1991, pp. 17-22.
Isao Okazaki, et al., "Spread Spectrum Pulse Position Modulation", A Simple Approach for Shannon's Limit, IEICE Trans. Commun., vol. E76-B, No. 8 Aug. 1993, pp. 929-940.
U.S. application No. 08/908,164, filed Aug. 7, 1997, pending.
U.S. application No. 09/229,896, filed Jan. 14, 1999, pending.

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