Adaptive diversity merging method of base band receiver for double antenna system

A dual-antenna and receiver technology, applied in the field of diversity combining, can solve the problem that the signal is not the best received signal, and achieve the effects of good compatibility, simple implementation, and guaranteed performance and stability
CN1937445AInactive Publication Date: 2007-03-28ZTE CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
ZTE CORP
Publication Date
2007-03-28
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The method includes steps: (1) calculating both signal level values received by the twin antenna, the energy of channel parameter estimate value and noise square-root difference estimate value; (2) comparing both signal level values with the preset threshold; if both signal values are greater than preset, then turning to step 3; if only one signal value is great than preset, it decodes and equilibrates the one greater; if both values are less than preset, steps finish; (3) comparing whether the energy sum of both channel parameter estimate values is in set range; if yes, then turning to step 4; otherwise, it demodulates and equilibrates only the greater one; (4) if both signal noise square-root difference estimate values are less than the threshold, then carrying out merger of equal gain for the two signals, demodulating and equilibrating both signal; otherwise, max-ratio combines, demodulates and equilibrates them. This method is simple and efficient.
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Description

technical field

[0001] The invention relates to a diversity combination method in a wireless mobile communication system, in particular to an adaptive diversity combination method for a baseband receiver in a dual-antenna system. Background technique

[0002] In the mobile communication process, the channel characteristics of the wireless channel are very bad, mainly manifested as multipath fading and Doppler fading. This will cause the received level of the wireless signal to drop to around the thermal noise level, and the phase will also change randomly over time, resulting in a decrease in communication quality. To solve this problem, diversity reception technology can generally be used to reduce the impact of fading, obtain diversity gain, and improve reception sensitivity. There are many methods of diversity, mainly including space diversity, frequency diversity, polarization diversity, angle diversity, time diversity and component diversity. Because space diversity r...

Claims

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