Frequency-division duplexing transmission method for wideband wireless communication system

Abstract

The invention relates to a frequency-division duplexing transmission method for a wideband wireless communication system, belonging to the technical field of digital information transmission. The method comprises the following steps of: carrying out downlink multiple access at the transmitting end of a base station by adopting a time-domain and frequency-domain united orthogonal frequency division multiple access technology to obtain a downlink signal; carrying out uplink multiple access at the transmitting end of user equipment by adopting a time-domain and frequency-domain united single carrier multiple access technology to obtain an uplink signal; and carrying out duplexing transmission on the downlink signal and the uplink signal by adopting a frequency-division duplexing frame structure. A TFU-OFDMA (Time domain and Frequency domain United Orthogonal Frequency Division Multiple Access) technology provided by the invention can be used for solving the multiple access problem of modulation by adopting TFU-OFDM (Time domain and Frequency domain United Orthogonal Frequency Division Multiplexing) and has the advantages of flexibly allocating wireless resources, effectively resisting deep fading and narrow-band interference and the like; and by using a TFU-SCMA (Time domain and Frequency domain United-Single Carrier Multiple Access) technology provided by the invention, the multiple access problem of modulation by adopting the improved SC-FDE (Single Carrier-Frequency Domain Equalization) can be solved, the advantages that the transmitting end has low complexity and peak-to-average power ratio by the SC-FDE technology can be retained and the synchronization and channel estimation can be better carried out by the receiving end.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, in particular to a frequency division duplex transmission method in a broadband wireless communication system. Background technique [0002] The broadband wireless communication system can realize the full-duplex transmission of signals through the Frequency Division Duplexing (FDD) method, that is, the downlink (communication link transmitted from the base station to the user equipment) signal and the uplink (transmitted from the user equipment) signal Communication link to the base station) signals are transmitted on two different frequency bands at the same time. [0003] Signal transmission in broadband wireless communication needs to overcome the problems of frequency selective fading and time selective fading caused by channel multipath effect and Doppler effect. The proposal of technologies such as Orthogonal Frequency Division Multiplexing (hereinafter referred t...

AI Technical Summary

Problems solved by technology

This scheme can flexibly allocate wireless resources, well adapt to the different transmission rates of each user, and effectively resist deep fading and narrowband interference, but it is not conducive to fast time synchronization at the receiving end

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