To improve system performance, there are many key technologies need to be solved or improved in OFDM and SC-FDE systems, where channel estimation is one of them.
为了进一步提高系统性能，OFDM和SC -FDE系统都还有很多关键技术需要进一步的解决和完善，信道估计就是其中之一。
In this paper, channel estimation and FDE algorithm in the SC-FDE system are mainly studied.
本文重点对单载波频域均衡(SC -FDE)传输方案中的信道估计和频域均衡算法进行了研究。
This algorithm has higher spectral efficiency compared with present one. According to the character of sequenced optimal signal space in SC-FDE, we propose an algorithm called minimum power algorithm.
论文依据贪婪算法提出了SC-FDE中的最小功率算法，该算法需要回传信息量小，计算复杂度比较低。
But SC-FDE cannot finish adaptive modulation utilizing CSI directly like OFDM due to it has to make symbol mapping and detecting in time domain.
但由于其符号映射和检测在时域完成，因此在SC -FDE系统中利用信道状态信息来完成自适应调制，并不像OFDM那样直接。
After describing some basic channel estimation algorithms in OFDM and SC-FDE systems, we propose some new channel estimation algorithms.
在简单介绍了OFDM和SC - FDE中的一些信道估计技术后，我们提出了几种信道估计方法。
Optimal signal subspace is the foundation for our adaptive modulation algorithms in SC-FDE. Another new concept is introduced called sequenced optimal signal subspaces.
最优信号子空间的思想是SC - FDE中设计自适应调制算法的根本基础，在此基础上又提出了序列最优信号子空间的概念。
LS algorithm and DFT-based algorithm were studied and signal-to-noise estimation algorithms in AWGN channel were introduced to SC-FDE systems.
研究了LS算法及其DFT改进算法，并将高斯白噪声信道中的信噪比估计方法引入到单载波频域均衡系统中。
SC-FDE USES frequency domain inverse filter to offsetting the linear distortion of the channel based on the channel estimation in frequency domain.
SC - FDE根据频域信道估计的结果，采用频域逆滤波器来补偿信道的线性失真。
The performance of BER of the proposed SC-FDE system overcomes adaptive OFDM system with one bit per subcarrier CSI feedback in the same conditions.
与一比特信道状态信息回馈的自适应OFDM比较，自适应SC-FDE系统误码性能更好。
The performance of BER of the proposed SC-FDE system overcomes adaptive OFDM system with one bit per subcarrier CSI feedback in the same conditions.
与一比特信道状态信息回馈的自适应OFDM比较，自适应SC-FDE系统误码性能更好。
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