用线性调频信号调制解决码间串扰问题  

THE SOLUTION TO THE INTER-SYMBOL INTERFERENCE WITH THE LFM

作　　者：王贞松[1] 张晓振[2] 

机构地区：[1]中国科学院计算技术研究所,北京100080 [2]中国科学院电子学研究所,北京100080

出　　处：《电子与信息学报》2003年第9期1218-1224,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(NFNS 69896250-2)

摘　　要：该文提出用线性调频信号调制的方法解决码间串扰的问题。为了与其它调制方法进行对比,分别从公式推导和误码率两方面进行讨论,并给出仿真结果。理论推导和实际仿真结果都表明,利用线性调频信号进行调制,可以很好的抑制码间串扰。在恶劣的环境中(平均多径时延较大)仍然可以保持较高的传输速率。线性调频调制技术的优点是:不需在接收端添加均衡滤波器,也不须进行扩频编码。The technique of the Linear Frequency Modulation (LFM) is proposed to solve the problems of the inter-symbol interference in this paper. For comparing with other modulation techniques, the BER is analyzed, and the simulation results are given. The theoretical prediction and the simulation results indicate that the LFM is very useful to depress the inter-symbol interference. The high transmitting speed is held in some areas where the average of the multi-path time dispersion is larger. The merits of the LFM are that it is not necessary to have an equalizer or the spread spectrum code modulation.

关 键 词：线性调频信号 压缩比 码间串扰 误码率 无线数字通讯 多径时延 

分 类 号：TN911.4[电子电信—通信与信息系统] TN914.3[电子电信—信息与通信工程]