Spread-spectrum communication apparatus

Details Spread-spectrum communication apparatus Spread-spectrum communication apparatus

1996-11-27

1999-07-27

Vo, Don N.

Pulse or digital communications

Repeaters

Testing

H04B 169

Patent

active

059302879

ABSTRACT:
A spread-spectrum communication apparatus includes a receiving antenna, amplifiers, band-pass filters, a threshold filter circuit, a despreader, a base-band demodulation circuit, and other circuit stages. The threshold filter circuit is connected in series before the despreader. The threshold filter circuit has a frequency-band width covering the band width of a spread signal and cuts interference waves at certain levels at each frequency within the frequency band. The threshold filter circuit includes a magnetostatic wave device.

REFERENCES:
patent: 5317289 (1994-05-01), Konishi et al.
patent: 5402442 (1995-03-01), Ishigaki
patent: 5404375 (1995-04-01), Kroeger et al.
patent: 5479442 (1995-12-01), Yamamoto
IEEE Transactions on Communications, vol. 37, No. 12, Dec. 1989, "Adaptive Narrow-band Interference Rejection in a DS Spread-Spectrum Intercept Receiver Using Transform Domain Signal Processing Techniques" by John Gevargiz et al., pp. 1359-1366.

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