Based on these results, we analyze the different optimization criterions for superimposed pilot and design the corresponding training sequences. Furthermore, the iterative joint channel estimation and signal detection is applied to improve the system performance.
In comparison with the multiplex training scheme,superimposed pilot has the advantage of efficient bandwidth and high information rate,thus become more and more attractive.
In this paper we propose two iterative algorithms of joint channel estimation and symbol detection for Orthogonal Frequency Division Multiplexing (OFDM) systems. In which, superimposed pilot scheme is adopted and an initial Channel State Information (CSI) is obtained by employing a first-order statistic. In each subsequent iteration, we propose two algorithms to update the CSI. The Mean Square Error (MSE) of channel estimation and Bit Error Rate (BER) performance are given and simulation results...
In this paper we propose two iterative algorithms of joint channel estimation and symbol detection for Orthogonal Frequency Division Multiplexing (OFDM) systems. In which, superimposed pilot scheme is adopted and an initial Channel State Information (CSI) is obtained by employing a first-order statistic. In each subsequent iteration, we propose two algorithms to update the CSI. The Mean Square Error (MSE) of channel estimation and Bit Error Rate (BER) performance are given and simulation results...
Channel state information (CSI) is of great importance to wireless communications. Due to its virtue of not taking any extra signal spectral and having high accuracy,superimposed-pilot-based channel estimation method has received more attention. Proceeding with the algorithm’s complexity,this paper analyzes the effects of different training sequences on the algorithm’s complexity and deduced a fast channel estimation algorithm using the property of circulant Toeplitz matrix when using PN sequenc...
In comparison with the multiplex training scheme,superimposed pilot has the advantage of efficient bandwidth and high information rate,thus become more and more attractive.In this paper,the closed form expression of MSE and receive SINR as a function of pilot parameter is deduced,based on the first-order statistic channel estimation algorithm;then an optimal design scheme of superimposed pilot for MIMO systems is proposed to achieve the optimized MSE,receive SINR and PAPR simul...
与传统的复用式导频相比,叠加导频具有频带利用率高,传输效率高的优点,因而受到了广泛关注.本文基于叠加导频常用的一阶统计量信道估计算法,推导了MIMO(Multiple-Input Multiple-Output)系统中叠加导频参数与信道估计均方误差(Mean Square Error)和接收信干比(Signal to Interference and Noise Ratio)的闭合表达式.并进一步提出了一种叠加导频优化设计方法,使MIMO系统具有联合最优的信道估计均方误差,接收信干比和峰均功率比(Peak to Average Power Ratio).仿真分析了导频参数与信道估计均方误差和接收信干比的关系,表明了优化设计的有效性.