文档介绍：Abstract
Abstract
On the basis of the MIL-STD-188-141B protocol of the 3th generation HF
communication, this paper studies the key technologies of high speed data transmission
in HF channel, with focuses on the research of adaptive equalization of receiver.
Inter-Symbol Interference (ISI) is the main factor that degrades the performance of
the munications, which is caused by the multi-path effect. And the adaptive
equalization is an ponent to suppress ISI in receivers. Accordingly, the
related algorithms and structures of this technology are studied in this paper, and the
simulation results show that the Decision Feedback Equalizer (DFE) of square root
Kalman algorithm petent in munications because of its good
performance in convergence and stability. However, it also has a disadvantage of Error
Propagation which affects the judge of the information. To solve this problem, a new
DFE scheme is proposed which use an Error-detecting processor to classify the outputs
of the decision device and to restrict the feedback filter weights by a norm constraint.
And the scheme is tested in the Watterson channel model with a performance improved
effectively.
Finally, an analysis is made on the implementation schemes of the transmitter and
receiver on TMS320C5509 DSP supplied by pany, and a scheme based on
adaptive equalizer is given.
Keyword: HF High Speed Data Transmission Adaptive Equalization
Decision Feedback Equalizer Error Propagation
目录
目录
第一章绪论..................................................................................................................1
引言..................................................................................................................1
短波数据通信的发展............................................................................1
短波信道特性........................................................................................2
短波数据传输系统..........................