时频编码分集是一种新型的分集技术,不同类型的时频编码信号,有的能起到分集的效果,有的能克服码间串扰的影响,有的既能起分集作用,又能起抗串扰的作用。时频编码的信息是安排在时频调制信号的频率顺序上,不同信息的信号,其时间次序上的频率位置编排是不同的。故只要选用频率不相关或相关性不大,则显然具有抗瑞利衰落的作用,也有分集 Time-frequency code diversity is a new type of diversity technology. Different types of time-frequency coded signals can play diversity effect. Some can overcome the influence of crosstalk between codes. Some can not only play the role of diversity, but also can play Anti-crosstalk effect. The information of time-frequency coding is arranged in the frequency sequence of the time-frequency modulated signal, and different information signals are arranged in different time positions. So as long as the frequency of use is not relevant or not relevant, it is clear that the anti-Rayleigh fading effect, but also diversity