A linear equalization method, device and electronic equipment for an orthogonal time-frequency-space system

Abstract

The invention discloses a low-complexity and high-practicability linear equalization method, device and electronic equipment for an orthogonal time-frequency-space system suitable for actual communication application scenarios. The method includes: by analyzing the channel structure of the orthogonal time-frequency-space communication system based on the orthogonal frequency division multiplexing system, determining the time delay of the orthogonal time-frequency-space communication system under the condition of rectangular window The effective channel matrix of the Puler domain and the relationship between the effective channel matrix and the time-domain channel; according to the effective channel matrix and the relationship between the effective channel matrix and the time-domain channel, determine the low-complexity linear equalization method, and determine the evaluation matrix . The device includes a sampling signal module, a relationship analysis module and an equalization evaluation module. The remote monitoring electronic equipment includes a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the program, the linear equalization method for the orthogonal time-frequency-space system is realized.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a linear equalization method, device and electronic equipment for an orthogonal time-frequency-space system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is adopted in 5G because of its high spectral efficiency and other advantages, but when the user moves, due to the Doppler effect, the orthogonality between subcarriers is destroyed , which will lead to inter-carrier interference, thus degrading the communication performance of the system. In 5G communication, there are clear quality requirements for reliable communication between some high-speed mobile users, so Orthogonal Time Frequency Space Modulation OTFS (Orthogonal Time Frequency Space) system is proposed to resist the Doppler effect of the channel . [0003] Orthogonal time-frequency space modulation OTFS is a new modulation method that can effectively resist the perfor...

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Problems solved by technology

[0004] For the channel equalization of the OTFS communication system, due to the sparse characteristics of the channel in the delay-Doppler domain, most of the existing research focuses on the use of channel sparsity for nonlinear equalization. For the channel condition of the delay-Doppler domain There are few researches on the linear equalization method in China. Compared with the linear equalization method in the actual system, the nonlinear equalization method is not widely used, and it is more difficult to realize.

In addition, the existing schemes all consider the equalization method of the ideal channel under the condition of infinite window function. The infinite window means the transmission window function with infinite length in time and frequency domain, but this is impossible to realize in the actual system. Therefore, the practical applicability of existing schemes is low

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