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.
根据CD MA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.
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