A Carrier Recovery Algorithm for High Order QAM Signals

Author

Xue Wei ; Yang Xiaoniu ; Zhang Zhaoyang

Author_Institution

Nat. Lab. of Inf. Control Technol. for Commun. Syst., Jiaxing, China

fYear

2010

fDate

23-25 Sept. 2010

Firstpage

1

Lastpage

4

Abstract

The carrier recovery is one key technique in the demodulation of high order quadrature amplitude modulation (QAM) signals. A carrier recovery algorithm which switches between multi-threshold polarity decision mode and decision directed mode according to the standard deviation of the frequency of numerically controlled oscillator (NCO) is proposed. The proposed algorithm can detect a proper time for the mode switch to yield lower steady state error. The simulation results demonstrate the effectiveness of the proposed algorithm in improving the performance of blind carrier recovery.

Keywords

demodulation; quadrature amplitude modulation; blind carrier recovery; carrier recovery algorithm; decision directed mode; demodulation; high order QAM signals; multithreshold polarity decision mode; numerically controlled oscillator; steady state error; Constellation diagram; Detectors; Phase locked loops; Quadrature amplitude modulation; Signal processing algorithms; Simulation; Steady-state;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-3708-5

Electronic_ISBN

978-1-4244-3709-2

Type

conf

DOI

10.1109/WICOM.2010.5600968

Filename

5600968