变换域通信系统基函数生成方法改进

Improvement of Transform Domain Communication System Basis Function Building

变换域通信系统通过信道估计在变换域设计信号波形避开干扰,它没有采用载波调制,而是用一个类似噪声的基函数进行信息调制。通过引入干扰系数丰富了基函数的频谱结构,提高了基函数的自正交性,使基函数更适合正交调制,增强了变换域通信系统的抗干扰能力。特别是在干扰信号较强的情况下,能够保证系统的信息传输畅通。通过仿真比较改进前后基函数的自相关性,验证了前面的理论。

The fundamental idea in transform domain communication system is to synthesize a smart adaptive waveform to avoid interference at the transmitter. Its communication waveform is designed in transform domain （frequency or scale） according to the estimation of electromagnetic environment and no carrier modulation is employed, but a noiselike basis function is used to modulate the data. By introducing interference coefficient, construction of the basis function is improved, it is more orthogonal, has better use of the source of power spectral and enhances the ability of anti -jamming. Especially when the interference is powerful, this method can ensure the performance of the system. By simulation, the improved method with the old one is compared and this method is proved.