An adaptive algorithm for reducing phase error in digital carrier recovery for high-order QAM signals

IEICE Electronics Express

Abdolreza Nabavi¹  Babak Bornoosh¹ 

[1] Microelectronics Lab., Faculty of Electrical and Computer Engineering, Tarbiat Modares University

关键词: digital carrier recovery;    phase error;    phase estimation;    QAM;   

DOI  :  10.1587/elex.7.493

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)This paper describes an adaptive software aided technique for phase error reduction in digital carrier recovery (CR)for high-order Quadrature Amplitude Modulation (QAM). Simulations and analytical results illustrate a phase error variance improvement of at least 30dB compared to conventional CR, leading to more than 3dB processing gain enhancement for high-order QAM, using the simple 4th power phase estimation technique. The new technique can be employed to improve the performance of any CR loop, at the cost of slight complexity overhead independent of the modulation order.

【 授权许可】

Unknown