文章首先简要介绍了OFDM的基本原理，建立了系统仿真模型，对系统的同步和信道估计进行了分析。
Beginning with brief introduction for the basic principle of OFDM, this paper establishes the system simulation model and thereafter analyzes the synchronization and channel estimation.
通过在阵列天线多载波ds - CD MA系统下构造统一的信号模型，实现了基于子空间的信道盲估计。
By unified signal model of antenna array Multicarrier DS-CDMA system, the subspace-based blind channel estimation is achieved.
本文在分析TD _SCDMA系统下行链路基带离散时间传输模型的基础上，提出了一种下行链路信道估计的快速算法，并结合终端联合检测算法进行了计算机仿真。
In this paper a fast algorithm for channel estimation in downlink TD-SCDMA systems has been proposed by analyzing the discrete-time base-band transmission model.
根据CDMA系统信号模型和多径信道模型，运用码滤波方法对CD MA系统用户信号及其多径信号导引向量进行估计。
Based on the signal model and the multipath channel model of CDMA system, the steering vectors of multipaths of USES are estimated by using cold filtering method.
在多径多址干扰DS CDMA环境中，本文根据空时信号模型，用扩展的盲方法估计用户信道，从而进行盲mmse检测。
In DS CDMA channels with multipath and multiple access interference, this paper estimates blindly the user channel with extended space time channel model to process the blind MMSE detection.
当此消息模型构成的角调信号通过随机时变信道后，形成复杂的非线性估计模型。
When the Angle modulation signals made up of the message model have passed through a randomly time-varying channel, a complex nonlinear estimation model is formed.
然后在分析移动信道衰落特性的基础上，分析了多径瑞利信道的数学模型，并对基于这种模型的各种信道估计性能进行了仿真分析。
Then mathematic model of multi-path Rayleigh fading channels are presented based on the discussion of mobile fading channel characteristics. At last, the simulation results and analysis are given.
首先介绍了基于导频信号的辅助信道估计过程，并据此给出了信道模型。
The auxiliary channel estimating process based on pilot signal is introduced, and a model for the auxiliary channel is presented according to the process.
同时，基于确定信道模型的通信系统分析显示，该方案的抗信道估计误差的鲁棒性明显提高。
Meanwhile, the communication system analysis based on determinate channel model demonstrates that the robustness against the channel estimate error is evidently enhanced.
本文首先讨论了移动通信信道的各种参数对信道估计的影响，介绍了频率选择性信道的抽头延迟线模型和分集接收技术，在此基础上阐述了RAKE接收机的原理。
The tapped delay model of the multi-path frequency selective fading channels as well as the diversity receiver technique is introduced, and the principles of RAKE receiver are described.
本文根据信道对于信号的影响，得到了接收信号的数学模型，并总结了需要估计方法处理的信号参数。
With the influence of channel to signal, we get the mathematic module of receive signal and summarize the signal parameter that need to be deal with by estimate method.
在此信道模型中，多径数目少则几十多则几百，信道估计的好坏直接影响系统的性能。
The number of paths varies from dozens to hundreds, whose estimation accuracy influences system performance.
由时延和角度信息，得到一种基于参数信道模型的信道估计方法。
With the information of multipath delays and angles, an estimator based on parametric channel model is derived and the estimator's performance is analysed.
由时延和角度信息，得到一种基于参数信道模型的信道估计方法。
With the information of multipath delays and angles, an estimator based on parametric channel model is derived and the estimator's performance is analysed.
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