The BER can be significantly reduced by means of using a partially coherent source beam, so the performance is improved.
采用部分相干光作为激光光源，可以减小系统误码率，提高系统性能。
The generalized expression for the phase-space product Q of a beam generated from a partially coherent source is presented by using coherent-mode representation of partially coherent beams.
根据部分相干光的相干模表示法，推导了由部分相干光源所产生光束的相位一空间积Q。
The results show that logarithmic light intensity fluctuation variance will be less when light source coherence becomes worse, i. e. it becomes into partially coherent light.
其结果表明，当光源的相干性变差，即变为部分相干光后，对数光强起伏方差变小；
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