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 problem of adaptive decoding of space time trellis code (STTC) on the mobile wireless channels is considered in this paper.
该文提出了一种新的信道估计算法，用于无线移动信道下的正交频分复用系统。
This paper proposes a novel channel estimation method for wireless Orthogonal Frequency Division Multiplexing systems.
该文提出了一种新的信道估计算法，用于无线移动信道下的正交频分复用(OFDM)系统。
This paper proposes a novel channel estimation method for wireless Orthogonal Frequency Division Multiplexing (OFDM) systems.
即使在恶劣的无线移动信道下，该跟踪方法仍然能够跟踪相当长信息符号块而无需重新捕获。
Even in the badly wireless channel environment the proposed tracking method can track considerable blocks of symbol and there is no need for channel acquisition again.
正交频分复用(OFDM)是一种新型调制技术，特别适合在多径传播的无线移动信道中高速传输数据。
OFDM (Orthogonal Frequency Division Multiplexing) is a new modulation technology, it is suitable to high-data-rate transmission in the wireless transfer channel with multi-path transmission.
该文根据频域相关的原理，提出了一种新的用于无线移动信道下的正交频分复用(OFDM)系统的时频同步算法。
A new time and frequency synchronization method based on frequency domain correlation for an Orthogonal frequency Division Multiplexing (OFDM) system is presented.
符号时间的增加，使得OFDM系统具有良好的抗多径性能，但同时也使OFDM系统对于无线移动信道的时变性更加敏感。
The increasing of symbol duration makes OFDM more robust against multipath transmission, whereas, it makes OFDM more sensitive to the time varying of wireless mobile channels.
高数据传输速率以及终端的高速移动，导致无线通信信道具有时间选择性与频率选择性两个特征。
High data transmission rates and high mobility give rise to time - and frequency - selectivity in wireless communication channels.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
然后讨论了无线移动通信的传播环境，得到时变衰落信道的特点。
Then it analyzes the wireless mobile communication propagation environment and gets the characters of timing varying fading channel.
码间干扰被认为是在移动无线通信信道中传输高速率数据时的主要障碍。
Inter symbol interference is regard of transporting the high rate data main obstacle in the wireless mobile channel.
对于无线移动通信系统来说，面临着系统带宽效率和多径衰落信道等诸多问题的挑战。
The system bandwidth efficiency and the dispersive of wireless channel are the big challenges for the wireless mobile communication system.
但无论在IP网络还是在无线移动网络信道中，误码的产生、数据的丢失总是难以避免。
Whether in IP network or in the channel of wireless mobile network, error code or noise of signal and loss of data are always appear unavoidably.
本文主要讨论了移动通信系统无三阶互调干扰的无线电信道排列法。
The paper is purposed at a discussion of third -order intermodulation-free radio channel assignment methods.
提出的信道估计方法已成功运用于实际系统中，能够工作在复杂的无线移动环境，具有实用价值。
The channel estimation method proposed in the thesis has been successfully applied in practical system, which is able to operate in complex wireless mobile environment with a pragmatic value.
传输部分由中国移动提供的通信信道借助GPRS无线分组交换技术，实现数据透明转发。
Transmits partially the communications channel which provides by China mobile with the aid of the GPRS wireless grouping exchange technology, realizes the data transparently to retransmit.
对于无线网络，信道的高误码率和节点移动等会导致丢包，多路径路由和节点移动切换等会导致乱序。
In wireless link, Packet loss may caused by the high channel bit error rate and nodes mobile, and multi-path routing and node switching will lead to reorder.
无线信道变化的不规则性、节点的移动、加入、退出等都会引起网络拓扑结构的动态变化。
Channel changes in the irregular nature of the mobile node, adding or withdrawal from the network topology can also lead to other changes.
无线信道是移动通信的传输媒体，研究其特性并建立一个与实际传输环境相符合的无线信道仿真模型都有着十分重要的现实意义。
Researching its characteristics and establishing a simulation model which conforms to the actual transmission environment of the radio channel have a very important practical significance.
无线通信系统的性能主要受到移动无线信道的制约。
The performance of wireless communication system is mainly restricted by the quality of wireless mobile channel.
FCC(美国联邦通信委员会)规定一些设备上，如地面移动无线电，频谱遮罩或邻近信道功率比的需求。
The FCC (Federal Communications Commission) sets spectral masks or adjacent-channel-power-ratio requirements on some services, such as land mobile radio.
OFDM无线宽带移动通信系统中信道估计与均衡技术研究，Ph。
D thesis, OFDM wireless broadband mobile communication systems channel estimation and equalization study, Ph.
第二章在分析了移动无线信道特点的基础上，阐述了MIMO信道的特征并建立了数学模型。
In the second chapter, it analyses the wireless channel, and expounds the MIMO channel characteristic, and then models the MIMO channel.
根据北京地区移动通信无线电传播规律，在信号快衰落幅度服从m衰落的基础上，给出了M衰落波形信道的计算机仿真模型。
Based on the propagation regularity of land mobile communication in Beijing, this paper gives the computer simulation model of M-distribution fading wave channel.
无线信道是移动通信的传输媒体，所有的信息都在这个信道中传输。
The wireless channel is the transmission media for mobile communication, all the information are transmitted in this channel.
移动终端的速度对有效的切换、高效的动态信道分配、自适应调制、功率控制、均衡等无线应用都是必不可少的信息。
The knowledge of the velocity of the mobile terminals is essential in adequate handoff control, efficient dynamic channel assignment, adaptive modulation, power control, equalization, etc.
在无线移动通信系统中，信道的衰落会降低信号传输的可靠性。
In wireless communication system, channel fading can decrease the reliability of communications.
由于其在对抗多径衰落方面具有显著的效果，它适合于在无线移动通信信道下使用，因而得到广泛的研究。
With this model, the blind multiuser detection and iterative algorithm of MC-CDMA systems based on subspace projection are studied in the multipath fading channel.
第三代移动通信系统的关键技术包括高效信道编译码技术、软件无线电技术、智能天线技术、多用检测和干扰消除技术等。
The third Generation mobile communication system includes highly effective channel encoding-decoding, software radio, smart antenna, multi-user detection and interference cancellation etc.
第三代移动通信系统的关键技术包括高效信道编译码技术、软件无线电技术、智能天线技术、多用检测和干扰消除技术等。
The third Generation mobile communication system includes highly effective channel encoding-decoding, software radio, smart antenna, multi-user detection and interference cancellation etc.
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