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communication

于 2021-04-07 发布 文件大小:10KB
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代码说明:

  本文件包含通信所有过程,从调制,扩频,发送到接收,经过解扩,解调等。其中信道可以随机产生时变的多径信道。()

文件列表:

communication
.............\add_noise.m
.............\cut_cp.m
.............\de_map.m
.............\de_qam16.m
.............\error_count.m
.............\input_b.m
.............\insert_cp.m
.............\insert_pilot.m
.............\lmmse_estimation.m
.............\lr_lmmse_estimation.m
.............\ls_estimation.m
.............\map_16qam.m
.............\multipath_chann.m
.............\ofdm_system.m
.............\qam16.m
.............\rayleighnew.m
.............\Rhh_test.m
.............\selec_rayleigh_test.m
.............\SIR_n_fd.m

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  • shuixiazhikuoxitong
    水下扩频系统研究,本系统采用直接扩频序列方式,在有多径水声信道和无多径的水声信道进行研究比较(Underwater spread spectrum system, the system uses direct sequence spread-spectrum approach, in a number of Acoustic Channel Drive and non-multi-path acoustic channel for the study of comparative)
    2021-03-11 14:29:26下载
    积分:1
  • 2008_5
    在三条径的瑞利信道中,对于直接序列扩频: (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法,接收机分别采用等均益合并、最大比合并。用Simulink进行仿真,测量BPSK的误码率性能,画出比特信噪比与信道估计均方误差的关系曲线,画出比特信噪比与误码率的关系曲线,请解释在误码率为0.01时,两种合并方式所表现的不同的物理意义。 (2) 设频率已经同步,请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法,用Simulink进行仿真(自己编写代码S-Function方式),分析所设计方案的时间同步精度,画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步,请设计DS-CDMA一种具体的频率方法,用Simulink进行仿真(自己编写代码S-Function方式),画出比特信噪比与频率同步误差的关系曲线。 (err)
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