Method of transmitting data and communication system

Method of transmitting data and communication system

  • CN 1,808,959 B
  • Filed: 12/28/2005
  • Issued: 08/13/2014
  • Est. Priority Date: 12/31/2004
  • Status: Active Grant
First Claim
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1. a communication system, comprising:

  • By a plurality of emission sources of a plurality of transmitting symbols of a plurality of channels transmit;

    Adaptive demodulation device, for;

    Receive a plurality of symbols of corresponding described a plurality of transmitting symbols;

    Measure the signal quality of described a plurality of symbols, wherein, the measured value of described signal quality obtains by processing channel information;

    The quality of the corresponding signal quality of measured value based on described signal quality, for described a plurality of symbols or its subsymbol select a kind of suitable demodulation method to carry out detection process adaptively, wherein said demodulation method is selected from based on composing empty and eliminating the demodulation method of noise, demodulation method based on linear equalization, null method, demodulation method and the demodulation method based on low complex degree maximum likelihood based on maximum likelihood;

    Use described detection process to generate for described a plurality of transmitting symbols being carried out to the decision-making of detection;

    Wherein, described wave detector also for;

    Process described a plurality of symbol to obtain the value according to a preliminary estimate of described transmitting symbol;

    Described in use, be worth according to a preliminary estimate the search set that generates a plurality of simplification;

    Use the search set of described simplification to generate for described transmitting symbol being carried out to the decision-making of detection;

    Wherein, the search set of described simplification is obtained by the following method;

    (a) find out corresponding to each noise and estimate transmitting symbol qualified cluster point, thus the simplification search set of definition for launching symbolic vector;

    (b) search out energy minimization || y-Hx|| 2the simplification search set of transmitting symbolic vector, thereby generate the estimated value of described transmitting symbol, wherein, H is channel matrix, y is receiving symbol vector, x is transmitting symbolic vector;

    Wherein, described adaptive demodulation device comprises channel singular value decomposition module, and described channel singular value decomposition module generates singular value for generating the measured value of described signal quality;

    The conditional number of the optimal selection of the measured value of described signal quality based on maximum singular value, minimum singular value and channel, described conditional number is the ratio of maximum singular value and minimum singular value.

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