基于注水原理的TDCS功率分配算法

A Power Allocation Algorithm for Transform Domain Communication System Based on Water-Filling Principle

变换域通信系统(TDCS)具有对环境感知的能力,可以躲避干扰,具有优异的抗干扰性能。传统的TDCS在执行二元判决后采用了平均功率分配,这没有体现出信道间的质量差别。在自适应多门限基函数的基础上,对信道质量进行进一步细化,并基于"注水"原理,对TDCS基函数的功率谱进行优化分配,充分利用好的信道条件,舍弃较差的信道,对功率进行优化分配。仿真结果表明,采用此种算法能明显提高系统容量,具有很好的系统性能。

With the ability of sensing the electromagnetic environment, the Transform Domain Communi- cation System can avoid the jamming, and has excellent performance of anti - jamming. Traditional TDCS adopt average power allocation after carry out binary adjudicate, which does not incarnate the quality difference among channels. The algorithm of adaptive multi - threshold basis function generation intro- duce multi -structure, making the traditional adjudicate result more particular and reflecting the differ- ence of channel quality more veracious. The Water - Filling algorithm based on this basis function is in- troduced. This algorithm makes the best of better channel qualification, abnegate channels of a sort. The simulation results prove that adopt this algorithm can obviously improve system capability, and obtains preferable performance.