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Method for transmitting wideband signals via a communication system adapted for narrow-band signal transmission

  • US 6,539,050 B1
  • Filed: 06/25/1998
  • Issued: 03/25/2003
  • Est. Priority Date: 06/26/1997
  • Status: Expired due to Term
First Claim
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1. A method for transmitting a first spread signal having a first bandwidth via a communication system adapted for communicating a second signal of a second bandwidth, the second bandwidth being narrower than the first bandwidth, the method comprising the steps of:

  • modulating a first data signal with a particular orthogonal code to produce the first spread signal having the first bandwidth so that the first spread signal is subsequently orthogonal to the second signal of the second bandwidth;

    transmitting the first spread signal and the second signal simultaneously so that the first bandwidth overlays the second bandwidth; and

    comparing a message length to a predetermined threshold for the message length, and transmitting a message using a spread spectrum access channel of the first bandwidth when the message length is less than the predetermined threshold.

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