×

Multi-rate spread system

  • US 5,341,396 A
  • Filed: 03/02/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 03/02/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A transmitter for a direct sequence, spread spectrum communication system, the transmitter comprising:

  • (a) means for receiving an information-bearing input signal at a variable data rate;

    (b) means for producing a code signal comprising a pseudorandom sequence of chips at a chip rate;

    (c) DS modulation means for modulating the information-bearing signal with the code signal to produce a DS modulated signal such that each bit of the information-bearing signal is modulated with N chips of the code signal, N being an integer greater than 1; and

    (d) timing means for causing the value of N to vary as the variable data rate varies, such that the chip rate of the DS modulated signal is substantially constant as the data rate varies.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×