A new carrier recovery loop for high-order quadrature amplitude modulation

Author

Ouyang, Yuan ; Wang, Chin-Liang

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

1

fYear

2002

fDate

17-21 Nov. 2002

Firstpage

478

Abstract

In this paper, we present a new all-digital carrier recovery loop for high-order quadrature amplitude modulation (QAM) signal constellations. The proposed approach is a blind phase-frequency detector structure that consists of a phase detector, a phase offset estimator, a frequency offset estimator, and a digital control oscillator. As compared with previous related approaches, the proposed algorithm provides a wider acquisition range of ±400 kHz and a more accurate estimation of frequency and phase offsets. These features are demonstrated by simulation results of the DOCSIS (Data-Over-Cable Service Interface Specifications) cable modem system.

Keywords

cable television; data communication; digital phase locked loops; frequency estimation; phase detectors; phase estimation; phase locked oscillators; quadrature amplitude modulation; DOCSIS cable modem system; Data-Over-Cable Service Interface Specifications; QAM signal constellations; acquisition range; blind phase-frequency detector; carrier recovery loop; digital control oscillator; frequency offset estimator; high-order quadrature amplitude modulation; phase detector; phase offset estimator; Coaxial cables; Digital video broadcasting; Frequency estimation; Modems; Phase detection; Phase estimation; Phase frequency detector; Phase locked loops; Quadrature amplitude modulation; Telecommunication standards;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE

Print_ISBN

0-7803-7632-3

Type

conf

DOI

10.1109/GLOCOM.2002.1188125

Filename

1188125