文中介绍为了在有扰信道中提供可靠数据传输服务，通信网关在应用层使用经过改良的连续ARQ协议机制实现数据重传。
In order to provide reliable data transmission service on disturbed channels, a modified Go-Back-N ARQ protocol is used to retransmit data by a communication gateway.
由于对流层散射信道存在严重的衰落现象，故而传统的锁相环机制在散射通信中往往难以奏效。
Because of the fading characteristic in troposcatter channel, the mechanism of traditional phase locked loop is difficult to achieve the effect in troposcatter communication.
为了很好地利用移动信道，CDPD系统有一个功能复杂的MAC(媒质接入控制)层。
The CDPD system has a complex media access control (MAC) layer in order to make full use of mobile channels.
本文在3gpp物理层协议的基础上，首先对第三代移动通信WCDMA系统中独特的信道编码复用方案进行了深入的分析和研究。
In this paper, an in-depth analysis on the channel coding and multiplexing of WCDMA is presented on the base of 3gpp physical protocol firstly.
本文对自组织网物理层的载频估计算法和信道估计算法进行了研究和实现。
The carrier frequency offset estimation algorithm and channel estimation algorithm are studied and implemented in this paper.
由于卫星通信信道长，传输距离远，电波要穿过对流层和电离层，易使信号衰减，引入噪声，造成误码。
Due to satellite communication's long channel, far distance transmission and its wave through troposphere and ionosphere often brings the signal deamplification, noise and wrong code.
利用物理层的信道状态信息，该算法将物理层（PHY）的子载波分配同数据链路层（DLL）的数据包业务调度结合起来。
This algorithm combined sub-carrier allocation in the physical(PHY) layer with traffic scheduling at the data link layer (DLL) by employing the channel state information.
本文的工作集中在TD-SCDMA空中接口物理层基带信号处理的核心技术：信道的编码和复用。
Work of this paper focus on the core technology , namely Channel Coding and Multiplexing of baseband signal process of radio interface physical layer in TD-SCDMA.
算法产生的细粒度增强层视频码流能够在比特级任意截断，而且具备较强的信道适应能力和差错恢复能力。
The video stream generated by the algorithm can be truncated arbitrarily at the bit level, and has nice performance in adapting the transmit channel and recoving from error.
逻辑信道到传输信道的映射关系取决于RRC层配置的复用关系。
The mapping of logical channels on transport channels depends on the multiplexing that is configured by RRC.
本文根据海洋噪声场随机局部谱展开理论，分析了典型浅海负梯度(或负跃层)下低噪声信道的理论模型。
Based on the theory of the local spectrum of ambient-sea noise field, theoretical models of the low-noise-channel for typical shallow-water negative gradient (or thermocline) are developed.
在信道接入中为了提高包转发的效率，本文对802.11的MAC层控制帧做出一点改进。
In this thesis, we make a slightly modification for the control frame of the 802.11 MAC layer to enhance the transmission efficiency of packets in channel accessed.
针对信道接入层已有退避算法，提出了一种自适应慢速退避算法。
Based on the analysis of the existing backoff algorithms in access layer, this paper proposes an adaptive slow backoff algorithm.
对基于SCDMA接入方案的H FC上下行通信系统的发送机进行了功能仿真，为H FC接入网上行信道物理层的硬件实现创造了有利条件。
The function model of HFC communication system sender based on SCDMA is constructed in this paper, The modules of communication system can be simulated approaching the behavior of the hardware.
无线at M网络中，在信元进入AT M网络层前，须通过逻辑链路控制(llc)层来消除无线信道的影响。
In wireless network, a logical link control (LLC) layer is necessary to mitigate the effect of radio channel error before cells are released to the ATM network layer.
本论文对MIMO - OFDM系统物理层的若干关键理论和技术进行了深入研究，包括：信道估计、专用导频设计等问题。
This dissertation focused on MIMO-OFDM system and made a thorough research on the key theories and technologies including channel estimation and dedicated reference signal design.
在信道分配计算阶段按优先级确保瓶颈链路的带宽需求，实现网络信道干扰最小； 在信道分配切换阶段逐层实现切换，确保网络的连通。
In the channel calculation phase, the bottle-neck links' bandwidth was ensured by its higher priority so as to minimize interference among nodes.
楼梯(阶梯)：两层楼面之间的一系列踏阶，是从一个楼层到另一楼层的信道。
Stairway (staircase) : Series or flight of steps that provides a means of moving from one level to another.
楼梯(阶梯)：两层楼面之间的一系列踏阶，是从一个楼层到另一楼层的信道。
Stairway (staircase) : Series or flight of steps that provides a means of moving from one level to another.
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