Method for improving smart antenna array coverage
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United States of America Patent
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May 18, 2004
Grant Date -
Mar 27, 2003
app pub date -
Sep 25, 2002
filing date -
Mar 27, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a method for improving smart antenna array coverage. Arbitrary beam forming of an antenna array can be implemented by adjusting n antenna units beam forming parameter W(n), based on difference of size and shape between coverage required in engineering design and actually realized coverage. The method includes: setting an accuracy of W(n), i.e. an adjusting step length, setting a set of initial values W.sub.0 (n), an initial value of mean-square error .epsilon..sub.0, setting counting variable, setting threshold of ending adjustment M and maximum emission power of an antenna unit T(n). With the settings, a loop for W(n) adjustment is executed. A step-by-step approximation method is deployed for adjusting antenna radiation parameters, based on the minimum mean-square error criterion. Finally, an actual coverage of an antenna array approximates to the required coverage, under local optimization condition.
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