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In wireless communications, fading is deviation of the attenuation that a carrier-modulated telecommunication signal experiences over certain propagation media. The fading may vary with time, geographical position and/or radio frequency, and is often
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Abstract-The mobile radio channel can be simulated as a
complex-valued random process with a time-varying variance.
This paper describes an implementation of that process using
a real-time Digital Signal Processing (DSP) technique. The simulato
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OFDM is a multi-carrier transmission technique. It converts the frequency selective fading channel into a collection of parallel flat fading sub-channels which simplifies the structure of a receiver. OFDM has been widely used in communication system
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水声通信面临的最困难的问题是多途干扰,其中自多途引起接收信号的幅度衰落,互多途引起接收信号的码间干扰,再加上海洋环境的高噪声背景、低的载波频率、极为有限的带宽以及传输条件的时间—空间—频率变化特性,使得通信过程十分困难。此外,水声通信试验的成本高,难度大,也为水声通信研究带来挑战。
本软件对水声信道的仿真研究很有帮助,可以产生声线图,冲激响应,声速图等仿真文件,结合Matlab画图工具绘制图像,对水声信道的模拟仿真很有帮助。-The most difficult problem fac
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