海洋水声信道是多途、时变和频散的信道。
Ocean underwater channel is a stochastic acoustic propagation channel with its multipaths, time variety, and frequency spread.
水声信道存在多径效应、多卜勒频偏及各种噪声干扰。
There are severe Multipath Effects, Doppler Spread and noise in underwater acoustic channels.
海洋水声信道是一种极其复杂多变的时-空-频变参信道。
Ocean channel is such a complex environment that it varies in space, time and frequency.
因此，研究盲均衡算法在水声信道中的性能是非常必要的。
Hence, it is significant to study the performance of blind equalizers for UWAC.
水声信道多径参数的实时估计对于提高接收机性能有重要意义。
It is important to enhance receiver performance by real time estimating the multipath parameters of underwater acoustic channels.
由于水声信道的多途效应造成水声通讯质量大大下降，误码率很高。
In underwater communications, multi-path effect leads to the reduction of communication quality and the high error code rate.
论文首先分析了水声信道的特点，建立了能充分反映其特点的信道模型。
Firstly, the properties of underwater acoustic channels is analyzed and the model of underwater acoustic channels has been found.
水声信道的随机时变特性使得匹配滤波器的检测性能下降，参量估计误差增大。
The detection performance of matched filter will be degraded and the errors of estimated parameters of matched filter will be increased in a randomly space-time variant channel.
讨论了准循环低密度校验码(QC - LDPC)在浅海水声信道中的实现方案。
Based on the suitable channel model, an implementation of quasi-cyclic low density parity check codes (QC-LDPC) for acoustic communication system in shallow water is demonstrated.
水下视频图像压缩一直是有限带宽水声信道实时传输海量视频数据的关键技术之一。
Underwater video compression is one of the key technologies for transmitting massive amount of real-time video data via underwater acoustic channels with limited bandwidth.
当研究水声信道和信号在其中的检测效果时，利用本文的结果可以选择最佳的接收方向。
Investigating the channel of the underwater sound and the effect of the signal detection in it, by utilizing the obtained results, the optimum receiving direction can be chosen.
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。
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.
论文首先介绍了海洋水声信道的特性，给出了两种远程水声信道模型和相应的信道参数。
At first, characteristics of underwater acoustic channel are introduced, and two models of long distance underwater acoustic channel are given with relevant channel parameters.
为抵抗水声信道的传输差错，提出了一种具有较高抗误码能力的水下图像高效编码算法。
An efficient and error resilient underwater image coding algorithm is presented to resist the transmission errors of the underwater acoustic channels.
本文论述了应用于水声信道的级联tCM编码方案，并在水声信道模型中对其进行了性能仿真。
This paper describes the serial concatenated TCM coding method applied in underwater communication system, and simulates its performance in the channel model.
针对高速水声通信中信道的稀疏特性，提出了一种基于常数模准则的稀疏水声信道判决反馈盲均衡算法。
A blind equalization algorithm based on constant modulus and sparse underwater acoustic channel is presented according to the sparse characteristic of the high rate underwater acoustic communications.
而由此构成的水声信道是一个空间与频率响应随机快速变化的传输信道，存在窄带、高噪及强多途干扰。
Underwater acoustic channel is a time-space-frequency variant channel, having a character for narrow bandwidth, high ambient noise level and strong interference of multipath.
在水声信道环境下，移动双方如何做到高速、高效、高精度的通信是水声通信领域的热点研究方向之一。
In underwater acoustic channel, how do mobile high-speed, high efficiency, high precision of communication is one of the hot researching directions in the field of underwater acoustic communication.
而基于双层符号常数模的多径水声信道盲均衡器，具有收敛速度快，超量均方误差和计算复杂度小等特点。
The DSCMA-based multipath underwater acoustic channel blind equalizer has many features such as fast convergence, low excess mean square error and low computational complexity, etc.
针对水声信道高噪、强干扰、传输时延大、带宽很窄等特点，本文基于位平面对水声图像传输进行了研究。
Comprehensively considering the image compression and robust transmission, underwater image progressive transmission based on bit planes was put forward in this paper.
但水声信道的时变多途效应造成接收数据严重的码间干扰（I S I），使得高速水声通讯的实现十分困难。
Time variant multipath propagation in acoustic channel causes serious intersymbol interference (ISI), which makes high speed data transmission over acoustic channel very difficult.
在严重噪声的衰落信道(移动通信信道、水声信道等)中，采用联合编码技术比采用分离编码技术更能获得令人满意的效果。
In the fading channel with high noise, e. g. mobile communication channel and UWA channel, JSCC gets better performance than separated coding.
为了提高水声信道的信道容量，将多输入多输出(MIMO)技术用于水声信道，提出一种基于空时分组编码(STBC)的MIMO通信系统。
To improve the channel capacity, a new Alamouti space-time block coding (STBC) multiple-input multiple-output (MIMO) system was employed for underwater communications.
合适的水声传播模型是水下声信道传递函数预报的基础。
The proper sound propagation model is the basis of transfer function prediction of underwater acoustical channel.
合适的水声传播模型是水下声信道传递函数预报的基础。
The proper sound propagation model is the basis of transfer function prediction of underwater acoustical channel.
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