The Simulation Of Oilfield Water Injection Wells Acoustic Communication Channel And Adaptive Equalization

Our emphasizes in these paper are the simulation of the underwater acoustic channel of water inject well based on the characteristices of the real ones, which are obtained by analyzing the real ones in the oil field, as well as the application to the channel equalization algorithm in the equalization for the underwater acoustic channel of the water inject well mentioned above.First of all, we introduce the model of EUACC (Engipath Underwater Acoustic Communication Channel) ,as well as its application to the underwater acoustic channel of water inject well. In terms of the model of EUACC,we use the simulated parameters,which are obtained through analyzing the model of the acoustic channel of water inject well in theory,to simulate the underwater acoustic channel of the water inject well by the approach of passband communication.Then,the final result of the simulation,as well as the corresponding analysis of the results,are showed finally.In addition,we propose the approach of the adaptive equalization algorithm to reduce rate of error code ,which is caused by ISI (intersymbol inference).According to the structure of adaptive equalization,we demonstrate the analysis of liner equalization and decision feedback equalization,in which the principles and the characteristices of the Least Mean Square algorithm and Recursive Least Square algorithm are adopted.Moreover,four approaches of four algorithm,which are proposed by ourselves, are demonstrated,as well as the simulation of performance of each approach under the condition of baseband communication based on the simple multipath model.In terms of the result of the simulation,the adapted channel conditions for each algorithm are demonstrated.At last, with the equalization algorithm,the improved model of EUACC,as well as the approach of passband communication mentioned above, we demonstrate the model of the the underwater acoustic equalization channel of the water inject well,as well as the simulation based on these model.The bandwidth of the filter and the effect of noise to the performance of equalizer are analyzed too.Additionally,a new approach based on both the filter and the equalizer are proposed.