实部虚部索引广义频分复用多载波调制技术

为提高多载波调制的频谱效率,提出了一种名为实部虚部索引广义频分复用(generalized frequency division multiplexing with real and imaginary indices modulation,GFDM-RIIM)的新型多载波调制方案。该方案将广义频分复用(generalized frequency division multiplexing,GFDM)的子载波索引分为实部索引和虚部索引两部分,从而使系统可以携带更多的比特信息。给出了GFDM-RIIM的系统模型,并进行了复杂度分析、频谱效率分析和多径瑞利信道下的误比特率(bit error rate,BER)性能仿真。结果表明,所提方案的频谱效率和BER性能均优于现有的GFDM、索引调制广义频分复用、正交频分复用和滤波器组多载波方案。

Generalized frequency division multiplexing with real and imaginary indices modulation technology

To improve the spectral efficiency of multicarrier modulation, a multicarrier modulation scheme, called generalized frequency division multiplexing with real and imaginary indices modulation (GFDM-RIIM) is proposed. In this scheme, the subcarrier index is divided into real part index and imaginary part index, and this allows the system to carry more information. The GFDM-RIIM system model is presented and the complexity, spectral efficiency and the bit error rate performance under Rayleigh multipath fading channels are analyzed. It is shown that the GFDM-RIIM achieves a higher spectral efficiency and better reliability than the existing GFDM, generalized frequency division multiplexing with index modulation, orthogonal frequency division multiplex, filter bank based multicarrier schemes.