一种改进的互复用调制方法

针对传统的互复用调制方法中,8种不同的输入信号组合值与6个不同相位量之间对应关系模糊的问题,提出了三码八相的互复用调制方法。基于三码八相互复用调制方法,利用与3路输入信号相关的指数因子,推导出了新的互复用基带调制信号表达式,实现了复用调制信号的相位翻转,得到了8个不同的相位值。仿真结果显示,三码八相互复用调制方法,保证了复用调制信号的恒包络特性,解决了输入码组合值与相位量之间对应关系的模糊度问题,研究结果对于GNSS组合中的信号调制有一定的参考价值。

An improved interplex modulation approach

In view of the ambiguity problem of corresponding relations between eight different combinations of input signal values and six different phases in the traditional Interplex modulation,an improved Interplex modulation with eight phases from three codes is proposed.Based on the proposed Interplex modulation,the proposed Interplex modulation expression of the baseband signal is derived by using the exponential factor associated with the three input signals.The phase inversion of the multiplexed modulation signal is realized,and eight different phase values are obtained.The simulation results show that the proposed Interplex modulation,which ensures the constant envelope of the multiplexed modulation signal,solves the ambiguity problem of the corresponding relationship between the input code combination values and the phases.The results have some reference value for the signal modulation in GNSS combination.