Blind multipath identification method and system of mimo system based on clustering algorithm

Abstract

A method for blind multipath identification of a MIMO system based on a clustering algorithm, characterized in that it includes: the base station calculates the difference between the receiving signal-to-noise ratios of any two user terminals based on the communication request signal sent by the user terminal; Set the threshold, the base station sends a response signal to the user terminal to adjust the transmission power of the user terminal, so that the communication request of each user terminal passes; the base station separates the information signals sent by multiple user terminals through a spatial filter, and the base station generates any information signal based on the separated information signal. The input signal of the clustering algorithm of any path of a user end, based on the input signal and the clustering algorithm, identifies the path of the information signal corresponding to each user end; the base station obtains the maximum ratio combination of each user end based on the identified path, and decodes all information Signal. According to the present disclosure, the problem of multipath identification in the wireless communication field can be improved based on the clustering algorithm, and the communication quality can be improved.

Description

technical field [0001] The present disclosure relates to the technical field of wireless communication, and in particular to a method and system for blind multipath identification of a MIMO system based on a clustering algorithm. Background technique [0002] As the user's demand for wireless communication data transmission is getting higher and higher, the application of high-quality wireless communication technology is increasingly required. In order to meet the high-speed and high-capacity data transmission requirements, multiple-input multiple-output MIMO technology (Multiple-InputMultiple-Output) It has received extensive attention from the market, especially for multi-user MIMO systems. Multi-user MIMO provides a Space Division Multiple Access (SDMA) architecture for wireless communication, and a multi-user MIMO system can provide great advantages over traditional point-to-point MIMO systems. In SDMA, multiple users transmit simultaneously using the same frequency cha...

AI Technical Summary

Problems solved by technology

However, there are two main problems with the third method: first, the transmitted signal is a special type rather than a general type, and second, it requires a large enough sample of received data, which is not suitable for ultra-reliable and low-latency communication (URLLC)

However, due to small-scale multipath fading and receiver noise can cause randomness, and each user has a transmission power limit that cannot be adjusted arbitrarily by the base station, some paths may be difficult to classify

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