公开(公告)号：US12088438B2

公开(公告)日：2024-09-10

申请号：US17679911

申请日：2022-02-24

Applicant: Beijing University of Posts and Telecommunications

Inventor： Wenjun Xu ,  Tingting Zou ,  Hui Gao ,  Zhisong Bie ,  Ping Zhang ,  Fengyu Wang ,  Jiaru Lin

IPC: H04W24/02 ,  H04L25/03

CPC classification number: H04L25/03878 ,  H04W24/02

Abstract: Disclosed is a low-complexity linear equalization method for an Orthogonal Time Frequency Space (OTFS) system. The method may include: receiving a time domain signal passing through a linear time-varying (LTV) channel; sampling the time domain signal to obtain a sampled signal; demodulating the sampled signal to obtain a demodulated signal; performing a Symplectic Finite Fourier Transform (SFFT) on the demodulated signal to obtain a sampled delay-Doppler domain signal; determining an effective channel matrix in a delay-Doppler domain under a restriction of a rectangular window according to a time domain channel matrix; determining a linear equalization matrix according to the effective channel matrix; and equalizing the sampled delay-Doppler domain signal in a low-complexity way according to the linear equalization matrix. The disclosure also discloses a linear equalization device of an OTFS system for realizing the linear equalization method and a computer-readable storage medium.