A new carrier recovery method for 16-QAM signal

Author

Park, Young-Ok ; Ahn, Jee-Hwan

Author_Institution

Electron. & Telecommun. Res. Inst., Taejon, South Korea

fYear

1997

fDate

17-19 Dec 1997

Firstpage

194

Lastpage

197

Abstract

We propose a new carrier recovery method for the 16-level quadrature amplitude modulation (16-QAM) signal, which reduces the phase jitter of the recovered carrier. In this method, the received 16-QAM signal is processed in two paths; one path transforms the received signal into a 12-PSK signal, and the other detects the envelope of the received signal. Using an envelope detector and a window detector, we extract the time period that the 16-QAM signal causing phase jitter exists. We recover the carrier phase from the 12-PSK signal using a digital phase locked loop (PLL) which is controlled by the window detector output. By this method, the data pattern-related noise of the conventional times-four carrier recovery method is entirely eliminated. We implement an experimental model to examine the proposed method

Keywords

demodulation; digital phase locked loops; jitter; phase shift keying; quadrature amplitude modulation; signal detection; 12-PSK signal; 16-QAM signal; PLL; data pattern-related noise; digital phase locked loop; envelope detector; experimental model; phase jitter reduction; quadrature amplitude modulation; received signal; recovered carrier; signal envelope detection; time period; times-four carrier recovery method; window detector; Bandwidth; Bit error rate; Circuits; Data mining; Envelope detectors; Jitter; Phase detection; Phase locked loops; Quadrature amplitude modulation; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Wireless Communications, 1997 IEEE International Conference on

Conference_Location

Mumbai

Print_ISBN

0-7803-4298-4

Type

conf

DOI

10.1109/ICPWC.1997.655506

Filename

655506