Data precoding method for MIMO wireless communication system

Abstract

The invention relates to a data pre-coding method in a multi-input multi-output wireless communication system, which belongs to the technical field of wireless data transmission. The method comprises the following steps: transmitting pilot frequency signals contained in the received OFDM symbolic data to a PC at the receiving terminal through an Ethernet interface by an FPGA at the receiving terminal; acquiring a channel response matrix of each sub-carrier in the OFDM symbolic data by using the pilot frequency data according to the maximum likelihood criterion or the least mean-square error criterion by the PC at the receiving terminal; subjecting the channel response matrix to matrix operations, such as SVD decomposition or QR decomposition, by the PC to obtain corresponding pre-coding matrix; and pre-coding to-be-transmitted data by a field programmable gate array at the transmitting terminal by using the pre-coding matrix. Test shows that the method can effectively carry out MIMO pre-coding while ensuring the data processing speed of the MIMO wireless communication system.

Description

technical field [0001] The invention relates to a data precoding method in a multi-input multi-output wireless communication system, belonging to the technical field of wireless data transmission. Background technique [0002] In order to support a higher transmission rate and achieve a higher spectrum utilization rate in wireless communication, it is an effective method to adopt a multiple-input multiple-output (hereinafter referred to as MIMO) technology. At the same time, in order to support the high-speed data transmission rate, it is necessary to require the communication equipment to have a high data processing speed to match it. Because Field Programmable Gate Array (hereinafter referred to as FPGA) has the characteristics of convenient parallel design and fast processing speed, FPGA is often used in the hardware implementation of high-speed data transmission system. [0003] In order to obtain better performance when using MIMO technology in a wireless communication...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a data precoding method in a multi-input multi-output wireless communication system, fully utilize the flexibility and high efficiency of PC processing matrix calculation to cooperate with FPGA to realize precoding in MIMO wireless communication system, to solve In the MIMO wireless communication system implemented by FPGA, the matrix calculation complexity encountered when using precoding technology is too high, and the calculation part of the more complex precoding matrix is ​​transferred from FPGA to PC, thereby realizing PC processing. The organic combination of the flexibility and high efficiency of matrix calculation and the high efficiency and real-time advantages of FPGA signal processing

Images