A Blind Estimation Method of Signal-to-Interference-to-Noise Ratio in Power Line Communication System

Abstract

The invention discloses a blind estimation method of a signal-to-interference-pulse-noise ratio (SINR) in a power line communication system. A proper time delay variable and a proper cyclic frequency variable are selected for effectively separating the signal power from the interference-pulse-noise power through calculating a periodic autocorrelation function of a receiving signal and respectively analyzing energy distribution graphs of the periodic autocorrelation functions of a transmitting signal, background noise, impulse noise and a receiving signal, so as to estimate the estimated value of the SINR. The method has the advantages that pilot frequency information does not need to be transmitted, cyclic stationary characteristics of the transmitting signal itself is used, blind estimation of the SINR is realized through analyzing the periodic autocorrelation function energy distribution of the transmitting signal, the background noise and the impulse interference and through selecting proper time delay value and the proper frequency value, a higher spectrum utilization rate is provided in comparison with a traditional pilot frequency transmitting method, the estimation value of SINR in the pulse interference environment can be estimated accurately and effectively, the estimation complexity is low, and the estimation accuracy is high.

Description

technical field [0001] The present invention relates to a power line communication technology, in particular to a method for blindly estimating the SINR in the power line communication system. Background technique [0002] Power Line Communication (PLC) technology refers to a communication method that uses power lines to transmit data and media signals. Compared with traditional wireless communication, power line communication has the advantages of high mechanical strength and good reliability. At the same time, because power line communication does not require infrastructure investment and daily maintenance costs of lines, it is more economical. With the rapid development of the Internet on a global scale and the increasing demands of users for new business services, the advantages of low-cost power line communication and the provision of broadband services will have huge room for development. At the same time, power line communication is also a hot spot for smart grids and...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a blind estimation method of SINR in the power line communication system, which fully considers all noises in the power line communication channel, and can accurately and effectively estimate the signal interference in the power line communication system Noise ratio with low computational complexity

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