CODE DIVISION MULTIPLE ADDRESS CODING METHOD
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United States of America Patent
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Issued Date -
May 5, 2011
app pub date -
Sep 13, 2009
filing date -
Sep 13, 2009
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Abstract
The present invention provides a code division multiple address coding method which uses related random variables or some constants such as time, space and frequency as the coding element. The encoding procedure includes following steps: selecting the basic orthogonal perfect complementary dual code; selecting the basic time, space and frequency coding expansion matrix; constituting a perfect orthogonal complementary code pairs mate; expanding the length and the number of the code group in accordance with the law of spanning tree; completing the coding by transforming the spanning tree. The Code Division Multiple Access (CDMA) system or other wireless communication systems using the present address coding can achieve not only high spectral efficiency, high capacity, but also a strong anti-fading ability, namely, the systems can obtain high hidden diversity numbers, high transmission reliability and low receiver threshold SNR (signal to noise ratio), which meet the project implementation requirements of high reliability and high transmission speed with only a very small portion of transmitting power.
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