OTFS signal detection scheme based on LDPC coding

Modern wireless communication has increasingly high requirements for communication systems. In order to meet the complex and everchanging application scenarios and performance requirements of 6G, a new waveform technology orthogonal time frequency space (OTFS) modulation has been developed in recent years. Most of the current research mainly focuses on the basic principle of OTFS system and the key algorithms of channel estimation and signal detection, and there are fewer researches on the coded OTFS system. this paper focuses on the low density parity check (LDPC) coded OTFS system signal detection BER performance is evaluated. By adding LDPC encoding and decoding modules at the beginning and end of the OTFS system, correlating the OTFS detector with the LDPC decoder. The performance of signal detection of the LDPC-encoded OTFS system is derived, and compared to the uncoded OTFS system, the performance of the LDPC-decoded receivers are all improved to a certain extent.