High speed data transmission using expanded bit durations in multiple parallel coded data streams

CAFC
  • US 5,960,032 A
  • Filed: 09/20/1995
  • Issued: 09/28/1999
  • Est. Priority Date: 09/20/1995
  • Status: Expired due to Term
First Claim
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1. A method for transmitting digital data in a wireless communication environment comprising:

  • dividing an incoming stream of serial data bits having a first bit duration (Tb) into a plurality (K) of parallel data bit streams;

    expanding by K times the bit duration of the incoming data so that the resulting symbol duration in said parallel data streams equals KTb ;

    modulating said expanded parallel data streams with modulating sequences, each said modulating sequence having a processing gain N, having a sequence period equal to the symbol duration KTb of said expanded data streams, and having N binary chips within each period so that each chip has a chip duration of Tc =KTb /N, wherein K and N are integers and N>

    K; and

    summing the modulated parallel data streams for transmission.

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