Frequency Offset Compensation and Carrier Phase Recovery for Differentially Encoded 16-QAM Vector Signal in a 60-GHz RoF System

Author

Yi, A.-L. ; Yan, L.-S. ; Liu, Cong ; Zhu, Mingda ; Wang, Jiacheng ; Zhang, Leiqi ; Ye, C.-H. ; Chang, Gee-Kung

Author_Institution

Center for Inf. Photonics & Commun., Southwest Jiaotong Univ., Chengdu, China

Volume

5

Issue

4

fYear

2013

fDate

Aug. 2013

Firstpage

7200807

Lastpage

7200807

Abstract

Differentially encoding and frequency offset compensating for a 16-quadrature amplitude modulation (16-QAM) vector signal in 60-GHz millimeter-wave radio-over-fiber (RoF) systems are experimentally investigated. The fourfold phase ambiguity issue in a non-data-aided signal communication transmission system with conventional square 16-QAM constellations is successfully tackled based on the differentially encoding scheme. Experimental results show that frequency offset compensation and carrier phase recovery are simultaneously achieved by utilizing the decision-directed carrier phase recovery algorithm. Up to ~ ±1.3 ×10^-3 frequency offset times symbol rate product Δf ·Ts is well compensated at the given bit-error-ratio (BER) value of ~ 10^-3.

Keywords

error statistics; quadrature amplitude modulation; radio-over-fibre; 16-QAM vector signal; RoF system; bit-error-ratio value; carrier phase recovery; frequency 60 GHz; frequency offset compensation; millimeter-wave radio-over-fiber systems; non-data-aided signal communication transmission system; Bit error rate; Frequency modulation; Optical fibers; Optical filters; Optical receivers; Vectors; Frequency offset compensation; carrier phase recovery; differentially-encoded 16-QAM; radio-over-fiber;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2013.2273735

Filename

6565399