【摘要】 离散多载波调制中需要将整个信道分成若干子信道。根据信道幅频特性的变化在不同频段有很大差异 ,提出了一种非均匀信道分割的方法 ,能使子信道数减少 ,子信道间能量的泄漏减少 ,子信道间的干扰相应减少 ,同时降低了调制时的计算复杂度。实验证明即使在比较少的子信道情况下 ,不影响系统的传输速率。更多还原

【Abstract】 The communication channel needs to be divided into many subchannels for discrete multicarrier modulation.Because the amplitude frequency response of the channel varies from one frequency band to another,we present in this paper a method that divides the whole channel into nonuniform subchannels.This new scheme can reduce the number of the subchannels and the energy leakage between neighboring subchannels and the interference.Meanwhile the computational complexity of modulation is also reduced.Experiments show that the capacity of this communication system is not affected when only several subchannels are used.更多还原