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Determining channel characteristics in a space-time architecture wireless communication system having multi-element antennas

  • US 6,307,882 B1
  • Filed: 07/10/1998
  • Issued: 10/23/2001
  • Est. Priority Date: 07/10/1998
  • Status: Expired due to Term
First Claim
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1. A method of determining channel propagation characteristics in a communication system wherein a number of communication channels are defined between a first number of transmit antenna elements associated with a system transmitter and a second number of receive antenna elements associated with a system receiver, comprising:

  • selecting a matrix of training signals for transmission from the transmit antenna elements;

    providing information concerning component terms of the selected matrix of training signals to the system receiver;

    transmitting the component terms of the matrix of training signals at a given symbol rate from the transmit antenna elements to the receive antenna elements in a determined sequence during a training signal time interval, and transmitting other information signals from the transmit to the receive antenna elements at times other than the training signal time interval;

    defining the training signal time interval to span a number of symbol intervals that are at least equal to the number of transmit antenna elements;

    receiving the transmitted component terms of the matrix of training signals via the receive antenna elements during said training signal time interval;

    determining member terms of a channel propagation characteristic matrix according to signals received by the receive antenna elements during the training signal time interval, and the information provided to the system receiver concerning the component terms of the selected matrix of training signals; and

    discriminating the other information signals transmitted from the transmit antenna elements to the receive antenna elements at times other than said training signal time interval, according to the determined member terms of the channel propagation characteristic matrix.

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