检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
出 处:《上海交通大学学报》2010年第2期189-192,共4页Journal of Shanghai Jiaotong University
基 金:国家自然科学基金资助项目(60572157)
摘 要:为解决多天线系统符号同步和载频同步中的联合参数非线性估计问题,提出一种混合粒子滤波方法.该方法基于最大后验概率准则,在接收端将时延、频率偏置用联合随机粒子表示,结合未知信道参数矢量的卡尔曼滤波估计值,获得联合粒子的重要性权重.同时,采用序列重要性采样和重采样策略来更新粒子权重并保持粒子的多样化,可避免直接在高维信道参数空间上进行重要性采样时效率下降的缺点.该方法在4发2收的多天线基带传输系统上的仿真实验表明,其参数估计精度较高,到达稳态所需的迭代次数较少,并可获得接近理想参数时的误码率性能.A hybrid particle filter was proposed for the synchronization of symbol and carrier frequency in multiple-input multiple-output wireless communication systems. It is based on maximization of a posterior probability. In the receiver side, propagation delay and carrier frequency offset are represented by a set of random particles. The important weights of particles are calculated by combining the channel parameters, which are estimated by the Kalman filter. Moreover, sequential importance sample and resample are implemented to update the weights and maintain the variety of particles. The approach does not directly sample on multidimensional channel space to overcome the disadvantage of computation efficiency reduction. Numerical results are presented under a four-transmit two-receive wireless communication system. They demonstrate that the estimation accuracy of the approach is high as well as the iterative step is short. The bit error rate performance is comparative to the situation with ideal parameters.
关 键 词:多输入多输出 频率偏置 信道估计 序列蒙特卡洛 粒子滤波
分 类 号:TN914[电子电信—通信与信息系统] TP183[电子电信—信息与通信工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:52.14.186.192