一種新的基函數(shù)產(chǎn)生方法與性能分析

針對變換域通信系統(tǒng)，提出了一種采用雙m序列控制的基函數(shù)相位映射方法，分析、仿真了所產(chǎn)生的不同基函數(shù)的相關(guān)性與時(shí)域隨機(jī)性等性能與特點(diǎn)。采用所提出的基函數(shù)生成方法產(chǎn)生的基函數(shù)，具有良好的隨機(jī)性與相關(guān)性，在不增加基函數(shù)產(chǎn)生的復(fù)雜度的條件下，基函數(shù)的隨機(jī)性由m序列的長度N決定，較普通一維m序列產(chǎn)生的基函數(shù)的隨機(jī)性提高N倍，有利于提高變換域通信系統(tǒng)的抗截獲能力，同時(shí)具有良好的抗干擾性。

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.