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Space-time scrambling for cellular systems

  • US 8,340,216 B2
  • Filed: 03/03/2006
  • Issued: 12/25/2012
  • Est. Priority Date: 03/18/2005
  • Status: Active Grant
First Claim
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1. A base station apparatus comprising:

  • a processor operative to;

    generate at least one stream of data symbols;

    identify a set of bits associated with space-time scrambling in a current value of a pseudo-random scrambling code associated with the base station apparatus;

    identify a current space-time scrambling matrix from a look-up table of space-time scrambling matrices based on the set of bits; and

    perform a matrix multiplication based on the current space-time scrambling matrix and the at least one stream of data symbols to space-time scramble the at least one stream of data symbols into at least two streams of output chips; and

    at least two transmitter units operative to transmit the at least two streams of output chips from at least two antennas to at least one receiver in a cellular system.

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