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Spread spectrum communication system

  • US 5,844,934 A
  • Filed: 06/24/1996
  • Issued: 12/01/1998
  • Est. Priority Date: 10/08/1992
  • Status: Expired due to Fees
First Claim
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1. A communication system using intelligence and synchronization signals, each signal being in the form of a repetitive pattern that has a certain duration and that is defined by a certain code to include a plurality of components at different frequencies, a transmitter including a plurality of sequence generator means each operable with one of said codes for developing each of said intelligence and synchronization signals, carrier signal means for developing a plurality of carrier signals at different carrier frequencies, plurality of mixer means each being responsive to one of said carrier signals and to said intelligence and synchronization signals to develop signal components in frequency range that is high in relation to said different frequencies of said components, and signal transmitting means for transmitting signals developed by said plurality of mixer means in a plurality of frequency ranges respectively corresponding to said different carrier frequencies, and a receiver for receiving signals transmitted from said transmitter, a plurality of filter means responsive to received signals to develop output signals in said plurality of frequency ranges, a plurality of detector means responsive to said output signals from said filter means to develop signals corresponding to those applied to said plurality of mixer means of said transmitter means, a plurality of product detector means responsive to output signals from said plurality of mixer means, a plurality of sequence generator means coupled to said plurality of product detector means and operable with codes corresponding to those of said sequence generator means of said transmitter to effect reproduction of said synchronization and intelligence signals by said plurality of product detector means, and means responsive to said synchronization signals for operating said sequence generator means of said receiver in synchronization with said sequence generator means of said transmitter.

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