Channel estimation method for OTFS system without protection band embedded pilot frequency assistance

The invention relates to a guard-band-free embedded pilot-assisted channel estimation method for an OTFS system, which belongs to the technical field of wireless communication, and comprises the following steps: S1, in the OTFS system, mapping data symbols into a delay-Doppler DD domain, inserting a pilot structure into the data symbols of the DD domain, and utilizing an OTFS system model, so as to obtain a channel estimation result; receiving signals in the DD domain are obtained; and S2, performing an iterative interference elimination technology at a receiving end according to the obtained received signal, and completing channel estimation while completing data detection. The comprehensive performance of the system can be effectively improved. 本发明涉及一种OTFS系统无保护带嵌入式导频辅助的信道估计方法，属于无线通信技术领域，包括以下步骤：S1：在正交时频空调制系统OTFS系统中，数据符号映射到了时延-多普勒DD域中，在DD域的数据符号中，插入导频结构，利用OTFS系统模型，得到DD域下的接收信号；S2：根据得到的接收信号，在接收端进行迭代干扰消除技术，在完成数据检测的同时完成对信道的估计。本发明能够有效提升系统综合性能。