Efficient Carrier Recovery for High-Order QAM

Author

Zhi, Liu ; Zhou, Jiang ; Qing, Li ; Xiaoyang, Zeng

fYear

2007

fDate

10-14 Jan. 2007

Firstpage

1

Lastpage

2

Abstract

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 960 kHz@256QAM over AWGN channels and 690 kHz@256QAM over typical coaxial cable channels at a baud rate of 6.9 Msps. Meanwhile, its complexity is quite low.

Keywords

AWGN channels; adaptive equalisers; multipath channels; phase detectors; quadrature amplitude modulation; 690 kHz; 960 kHz; AWGN channels; carrier frequency offset; carrier recovery; coaxial cable channels; decision-directed phase detector; dual-mode adaptive equalization algorithm; high-order QAM; multipath channels; polarity-based phase detector; quadrature amplitude modulation; AWGN channels; Adaptive equalizers; Bandwidth; Blind equalizers; Coaxial cables; Filters; Least squares approximation; Phase detection; Phase frequency detector; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics, 2007. ICCE 2007. Digest of Technical Papers. International Conference on

Conference_Location

Las Vegas, NV

Print_ISBN

1-4244-0763-X

Electronic_ISBN

1-4244-0763-X

Type

conf

DOI

10.1109/ICCE.2007.341325

Filename

4146162