Design of carrier recovery for QAM/VSB dual mode

Author

Jou, Shyh-Jye ; Lin, Hsin-Yi ; Shiau, Muh-Tian ; Heh, Jung-Yu ; Wang, Chrong-Kuang

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Chung-li, Taiwan

Volume

2

fYear

2002

fDate

29 June-1 July 2002

Firstpage

1535

Abstract

In this paper, an architecture and hardware implementation of the carrier recovery (CR) used in dual mode (QAM and VSB) transceiver for digital CATV is proposed. The proposed CR uses decision-directed approach with steep gradient algorithm, which can be used in both QAM and VSB signal. Thus, the hardware complexity for dual mode is dramatically reduced, while the performance is almost the same. To increase the acquisition range of CR, a frequency locked loop (FLL) is used in VSB mode while a derotator/rotator pair is adopted in QAM mode. As a result, the CR can reach ±100 KHz acquisition range. Finally, the CR is implemented by TSMC 0.35um 1P4M process. The total gate is 20820 and the maximum symbol rate is 21.52 M Baud.

Keywords

cable television; digital television; frequency locked loops; quadrature amplitude modulation; synchronisation; transceivers; 0.35 micron; QAM/VSB dual mode transceiver; carrier recovery; decision-directed method; derotator/rotator pair; digital CATV; frequency locked loop; hardware architecture; steep gradient algorithm; Baseband; Chromium; Convergence; Cyclic redundancy check; Data mining; Demodulation; Equalizers; Frequency locked loops; Passband; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on

Print_ISBN

0-7803-7547-5

Type

conf

DOI

10.1109/ICCCAS.2002.1179070

Filename

1179070