Channel coding method improving transmission reliability of non-line of sight millimeter wave indoor communication system

Abstract

The invention discloses a channel coding method improving transmission reliability of a non-line of sight millimeter wave indoor communication system, and brings forward a method that a variable-code-length low-density check code is used to improve communication reliability of a millimeter wave communication system. An error correction system is mainly adopted to generate different-length redundant data on user data having different bit numbers at the same coding rate, the user data and the redundant data are combined to form error correction codes having different code lengths, at least one bit of control information is used in a signaling domain to indicate a selected code length of current transmission, a transmitter selects a code length capable of providing and guaranteeing communication reliability according to various communication channels and quality of a transmission signal, code length information is transmitted to a receiver through control information, and the receiver uses the error correction codes corresponding to the code length to decode the data according to the received control information. The channel coding method effectively improves adaptability of a millimeter wave wireless communication system on a change of the transmission channel, and then transmission reliability of the system is improved.

Description

technical field [0001] The invention relates to a channel coding method, in particular to a channel coding method for improving the reliability of a non-line-of-sight millimeter wave communication system Background technique [0002] In the field of wireless communication, the frequency of millimeter wave is above 30GHz. Compared with the frequency band with lower frequency, the millimeter wave frequency band has abundant bandwidth resources. Therefore, the millimeter wave communication system can increase the data transmission rate of the communication system by expanding the bandwidth of the communication channel. . However, because of its high frequency, the millimeter wave will have greater air attenuation and transmission attenuation during transmission. The shorter wavelength of the signal results in poor diffraction ability and easy scattering during signal transmission, especially in indoor non-line-of-sight transmission. These all cause the communication channel fa...

AI Technical Summary

Problems solved by technology

In the existing millimeter wave wireless communication system, due to the large transmission attenuation of the signal, the signal diffraction ability is poor, and the effective receiving area of ​​the antenna is small, the communication reliability is easily affected under the condition of non-line-of-sight communication.

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