Internet and wireless channels are unreliable channels.
互联网和移动信道是不可靠信道。
So it becomes a pressing problem to solve robust transmission of video over wireless channels.
因此，解决视频等高速率数据通过无线信道的鲁棒传输成为一个紧迫的问题。
Thus, it becomes a pressing problem to solve robust transmission for video business over wireless channels.
因此，解决视频等高速率数据业务通过无线信道的鲁棒传输成为一个紧迫的问题。
However, wireless channels have enormous limitations to reliable high data rate transmission, especially for video.
无线信道对于可靠的视频传输具有很大的局限性。
Video transmission over unreliable channels such as wireless channels and Internet has become trend of video communication.
通过无线和互联网传输视频是视频通信的发展趋势。
The systemic design is related to two key techniques:One is for optimum seeking and automatic switching of wireless channels.
系统设计涉及两项关键技术：一是无线信道优选及信道自动切换技术。
The problem of adaptive decoding of space time trellis code (STTC) on the mobile wireless channels is considered in this paper.
本文探讨了无线移动信道中空时格形码的一种自适应解码技术。
The thesis first briefly introduces the characteristics of wireless channels, the basic principles and matrix model of OFDM system.
本文首先简要介绍了无线信道的特点，OFDM系统的基本原理及其矩阵简化模型。
Also when transmitted through wireless channels, signals are attenuated, which results that signals can not be demodulated correctly.
另外，信号经过无线信道传输时会有衰落，如不补偿信道影响的话将会无法正确解调信号。
A symbol timing algorithm for orthogonal frequency division multiplexing (OFDM) systems with the cyclic prefix under wireless channels is proposed.
提出了一种新的无线信道下基于循环前缀的正交频分复用系统符号定时同步算法。
Simulation results show that the technique can provide better image signal-to-noise rate performance over different bit error rates wireless channels.
在不同误码率的无线信道中的传输实验表明，此方案提供了更好的图像信噪比性能。
This work together with previous work concerning error resilient video coding, form a complete solution for robust video transmission over wireless channels.
这部分内容与前面的视频容错编码算法共同构成了一个完整的高鲁棒性的无线视频传输解决方案。
The channel of LEO satellite is different from wireless channels on the ground. Low SNR and large Doppler shift are the two characteristic of LEO satellite channel.
低轨卫星的信道与地面无线信道具有不同的特点，低信噪比与大多普勒频移是低轨卫星信道的两个显著特征。
According to stochastic characteristics of electromagnetic wave propagating in wireless channels, stochastic rays are employed to model electromagnetic wave propagation.
根据电磁波在无线信道中传播的随机特性，使用随机射线建模电磁波传播。
There are a lot of similar characteristic between the underwater acoustic channels and the wireless channels, much wireless communication technology now can be used for reference.
由于水声信道与无线电信道有着许多相似之处，很多无线通信技术都值得水声通信借鉴。
MDC scheme is well suited to the channels which transmission conditions are very poor for image communication without channel coding, especially for networks and wireless channels.
在图像通信应用中，在无信道编码的情况下，用MDC方法可适应传输条件恶劣的信道，尤其是无线信道和网络信道。
Orthogonal frequency division multiplexing (OFDM) can effectively combat the multipath fading of wireless channels and has become another hot point in the area of wireless communications.
正交频分复用(OFDM)技术能够有效的对抗无线信道的频率选择性衰落，成为无线通信领域的另一个研究热点。
Fractal characteristic of multipath fading signal is studied in the paper which shows that multifractal dimension is a key parameter for describing the signal propagation in wireless channels.
本文研究多径衰落信号的多重分形性质，分析并指出了信号多重分形维数是描述无线信道传播特性的重要参数；
Therefore, to realize real time transmission of video traffic over wireless channels, the error resilience of video coding must be improved, without significant compromises in video coding efficiency.
因此，要在无线信道上开展视频业务，必须在保证视频编码压缩效率的同时，提高视频编码的容错性能。
Therefore, to realize real time transmission of video traffic over wireless channels, the error resilience of video coding must be improved, without significant compromises in video coding efficiency.
因此，要在无线信道上开展视频业务，必须在保证视频编码压缩效率的同时，提高视频编码的容错性能。
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