过采样方法的应用研究  

Study on the Applications of Over-Sampling Method

作　　者：周晓正[1] 徐熙宗[2] 

机构地区：[1]北京石油化工学院信息工程学院,北京102617 [2]韩国全南大学电子通信工学科

出　　处：《北京石油化工学院学报》2011年第2期27-30,共4页Journal of Beijing Institute of Petrochemical Technology

摘　　要：提出一种过采样-脉冲计数方法,用于从基带信号或FSK、BPSK等数字调制信号中恢复二进制序列,也可以用于信道的信噪比估计中。该方法是在一个码宽内对信号多次采样,并对每个码宽内的脉冲进行计数,然后把计数结果用于符号的判决或估计信道的信噪比。仿真实验结果表明,该方法在误码率性能上要优于匹配滤波法;同时,该方法在用于信噪比估计时不仅估算精度比现有的两种方法高,而且估算结果与观察长度无关,因而更适合现代通信对实时性的要求。A new method for recovering binary code sequences from the base-band,FSK or PSK signals transmitted through Gaussian noise channel is proposed.Also,this new method can be used to estimate SNR.The new method adopts multisampling in every code width,and calculating pulse numbers in every code width,and the results are used in the symbol decision or SNR estimation.Lots of simulations show that,comparing with the traditional matched filter method,the proposed method can increase the BER performance.While the method is used to estimate SNR,the estimation performance is much better than the two traditional algorithms,and the estimation results are not influenced by the observation length of the data block.So,the new method is much suitable for the real time communications.

关 键 词：过采样 脉冲计数 匹配滤波 信噪比估计 

分 类 号：TN914.2[电子电信—通信与信息系统]