×

Spread spectrum communication system utilizing differential code shift keying

  • US 6,064,695 A
  • Filed: 06/20/1997
  • Issued: 05/16/2000
  • Est. Priority Date: 06/20/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of communication over a communications channel from a transmitter to a receiver both connected to the communications channel, said method comprising the steps of:

  • generating a plurality of symbols at the transmitter, each symbol constructed from a spreading waveform circularly shifted by an amount in accordance with the data to be conveyed by said symbol;

    generating a transmission signal in accordance with said plurality of symbols;

    transmitting said transmission signal onto the communications channel;

    receiving said transmission signal from the communications channel at the receiver and generating a receive signal therefrom;

    decoding said receive signal at the receiver by circularly shifting said received signal wherein for each circular shift, the received signal is correlated with a template corresponding to the spreading waveform so as to generate a correlation sum therefrom; and

    determining receive data in accordance with the shift corresponding to the maximum correlation sum.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×