一种新的基函数产生方法与性能分析

针对变换域通信系统，提出了一种采用双m序列控制的基函数相位映射方法，分析、仿真了所产生的不同基函数的相关性与时域随机性等性能与特点。采用所提出的基函数生成方法产生的基函数，具有良好的随机性与相关性，在不增加基函数产生的复杂度的条件下，基函数的随机性由m序列的长度N决定，较普通一维m序列产生的基函数的随机性提高N倍，有利于提高变换域通信系统的抗截获能力，同时具有良好的抗干扰性。

A method of using double m-sequences in phase mapping during the basis function generat on is proposed in the paper. The correlation between different basis function generated by different conditions is analyzed and emulated. The basis function generated by proposed method has good correlation. The basis function's randomicity may be increased and the generation complexity could not be increased at all. The analysis and emulating shows that the randomicity of basis function is determined by the length N of m-sequence, the basis function's randomicity of two-ary method is N times by that of one-ary method. The two-ary method will increase the abilities of anti-intercepting and capturing, and then the transform domain communication system has good ability of anti-jammers.