Research On Channel Estimation And Signal Detection For60GHz Wireless Communication System

Nowadays, the society’s demand for data transmition in wireless communication is in growth and the available spectrum resource is becoming increasingly scarce. The60GHz wireless communication system, because of its good international generality, without permission, security and the characteristics of high transmission rate, which can achieve Gbps of high transmission rate, all the aspects of these unique features make it becoming the focus of attention. In this paper, we focus on the nonlinear parameters and channel parameters estimation in60GHz wireless communication system, with analysis and research, some results are achieved, expecting to provide some valuable reference to channel estimation in the60GHZ wireless communication system.It’s common that there is nonlinear amplifier in the60GHz wireless communication system, however, so far there isn’t an effective method to estimate the nonlinear parameters and channel parameters at the same time. It is the innovative parts that we apply the MCMC algorithm to60GHz communication system, the effects imply that it is suitable for the channel estimation problem. MCMC algorithm (Markov Chain and Monte Carlo) via defining reasonable markov chain, to replace the high-dimensional integral operation, to transfer some complex high-dimensional problem into a series of lower dimensional problems, and do not need the prior distribution of the likelihood function and parameters with conjugate structure, so MCMC method can be used to solve the actual problems in statistical model. In the existing of nonlinear model of the wireless communication system, the nonlinear affects amplitude and phase in the known nonlinear model of the formula, the MCMC (Markov Chain and Monte Carlo) algorithm can be used to estimate the nonlinear parameter values, and the simulation results are in a reasonable range. And then the estimated results can be used in the signal detection.The main innovate parts of this paper is it provides the method of estimating nonlinear parameters and channel parameters estimation at the same time in the60GHZ wireless communication system with nonlinear amplifier in different scenarios, and this work has not been done neither at home or aboard. Aimed at the60GHZ wireless communication system with nonlinear amplifier, and in the single path model and multipath model, respectively, in the two scenarios of if existing frequency-offset, using MCMC algorithm of blind estimation and un-blind estimation to estimate the nonlinear parameters and channel parameters at the same time, and then defect the data input with the previous results. In addition, we analyze the effects of the blind estimation and un-blind estimation, and then expounds respectively the advantages and disadvantages of both methods and the suitable scenarios. The analysis results show that both methods can meet the requirements, however, the blind estimation method needs less prior information with the results of a bit poor as price.