Multi-carrier communication method and device of TDD mode MIMO wireless communication system

Abstract

The invention discloses a multi-carrier communication method and device of a TDD mode MIMO wireless communication system. The wireless communication system has a plurality of channels of base band signals, and each channel of signals include two spatial flow signals; the method includes the steps that frequency conversion is carried out by a transmitter on the multi-channel two-spatial-flow base band signals two times to obtain different-frequency single carrier microwave frequency band signals of the multi-channel two-spatial-flow, then the different-frequency single carrier microwave frequency band signals are merged to form a single channel of cross polarization double-spatial-flow multi-carrier microwave frequency band signals to be transmitted through a single antenna, the single channel of cross polarization double-spatial-flow multi-carrier microwave frequency band signals are separated by a receiver into multiple-channel two-spatial-flow single carrier microwave frequency band signals, and down-conversion is carried out on the multiple-channel two-spatial-flow single carrier microwave frequency band signals two times to obtain the multiple channels of base band signals. The invention further provides the multi-carrier communication device of the TDD mode MIMO wireless communication system in the mode. Compared with the prior art, the multi-carrier communication method and device have the advantages that abundant spectrum resources of millimeter waves can be effectively utilized, and the data transmission handling capacity of the wireless communication system can be improved in a multiplied mode.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and in particular relates to a multi-carrier communication method and device of a time division duplex (Time Division Duplexing, TDD) mode multiple input multiple output (Multiple Input Multiple Output, MIMO) wireless communication system. Background technique [0002] The third-generation mobile communication, such as WCDMA technology, is a non-MIMO technology and operates in a Frequency Division Duplexing (FDD) mode. Its single-carrier channel bandwidth is 5 MHz and a symbol transmission rate of 3.84 Mbps is achieved. In order to improve the system capacity, the base station adopts the multi-carrier transmission method, but this technology is realized in FDD mode. The signal frequency interval is very large, and the multi-carrier technology can be realized directly by combining or digital intermediate frequency technology in the radio frequency part. [0003] The physica...

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Problems solved by technology

[0007] Purpose of the invention: low-frequency band (below 6GHz) wireless communication spectrum resources are increasingly scarce, widely used interference is very large, which seriously affects system performance, and even cannot work effectively. Synchronization causes the transmission signal of one carrier to leak directly to the receiving link of another carrier, making its receiving link saturated and unable to work. Effective use of the very rich frequency resources in the millimeter wave frequency band doubles the wireless communication system. The data transmission throughput meets the requirements of the fourth-generation mobile communication technology LTE base station backhaul on the market and the transmission rate of multiple video streams up to 1Gbps

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