Efficient carrier recovery for high-order QAM

被引:0
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作者
Zhi, Liu
Zhou, Jiang
Qing, Li
Zeng Xiaoyang
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TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A novel carrier recovery algorithm for high-order quadrature amplitude modulation (QAM) is proposed in this paper. Besides the traditional decision-directed phase detector, the algorithm employs an improved polarity-based phase detector to extend the acquisition range of carrier frequency offset. And when combined with a dual-mode adaptive equalization algorithm, it can be used in the application over multi-path channels. Simulation results demonstrate that it can deal with carrier frequency offset up to 960kHz@256QAM over AWGN channels and 690kHz@256QAM over typical coaxial cable channels at a baud rate of 6.9Msps. Meanwhile, its complexity is quite low.
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页码:351 / 352
页数:2
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