OFDM的推广形式及其在频率色散信道的应用  

Generalized form of OFDM and its applications in frequency-dispersive channel

作　　者：曹祁生[1] 梁德群[1] 

机构地区：[1]大连海事大学信息工程学院信号与图像处理研究室,辽宁大连116026

出　　处：《通信学报》2009年第1期95-101,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60272017)~~

摘　　要：提出了一种OFDM的推广形式,将复码元的实部和虚部分别采用不同的脉冲成形进行调制。把这种调制形式称为G-OFDM。讨论了G-OFDM的脉冲成形和星座图设计问题。数值仿真表明,G-OFDM在频率色散信道的性能优于传统OFDM,同时这一优势并未降低系统对抗AWGN及时间色散的性能。A generalized form of OFDM was presented, termed G-OFDM. In such a system, the real and imaginary parts of complex symbols were modulated separately using different pulse shaping. The issue of pulse shaping design as well as constellations design for the G-OFDM was discussed. Numerical simulations show that G-OFDM outperforms traditional OFDM in frequency-dispersive channel, and this advantage does not sacrifice its performance in AWGN immunity or time-dispersion robustness.

关 键 词：OFDM 脉冲成形 频率色散 正交约束 

分 类 号：TN911[电子电信—通信与信息系统]