中国邮电高校学报(英文)

中国邮电高校学报(英文) ›› 2007, Vol. 14 ›› Issue (3): 95-98.doi: 1005-8885 (2007) 03-0095-04

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Phase noise approximation analysis for the OFDM system

汤靖; SHEN Shu-qun   

  1. Wireless Technique Innovation Institute, Key Laboratory of Universal Wireless Communication Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2006-12-02 修回日期:1900-01-01 出版日期:2007-09-30

Phase noise approximation analysis for the OFDM system

TANG Jing; SHEN Shu-qun   

  1. Wireless Technique Innovation Institute, Key Laboratory of Universal Wireless Communication Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2006-12-02 Revised:1900-01-01 Online:2007-09-30

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388

被引次数

1

摘要：

The influence of phase noise (PN) present at the access point (AP) and mobile terminator (MT) may degrade the performance in orthogonal frequency division multiplexing (OFDM) system, because the OFDM system is sensitive to the PN. The method of PN approximation based on the PN power spectrum was proposed to combat the influence of the PN present. The idea of the PN cancellation is the PN is approximated for the sum of the different frequency between the AP and the MT as well as Doppler shift supposing that the fixed different frequency during several OFDM symbols are identical, so the variable phase may be considered as the combination of the fixed partition and the random partition. The approximation method is utilized to remove the fixed and the random phase partition so that the signal-to-noise ratio (SNR) may be improved. The analysis and the simulation proposed show that the method may effectively improve the performance of the OFDM system.

关键词:

inter-carrier interference (ICI); phase noise can- cellation; common phase error (CPE)

Abstract:

The influence of phase noise (PN) present at the access point (AP) and mobile terminator (MT) may degrade the performance in orthogonal frequency division multiplexing (OFDM) system, because the OFDM system is sensitive to the PN. The method of PN approximation based on the PN power spectrum was proposed to combat the influence of the PN present. The idea of the PN cancellation is the PN is approximated for the sum of the different frequency between the AP and the MT as well as Doppler shift supposing that the fixed different frequency during several OFDM symbols are identical, so the variable phase may be considered as the combination of the fixed partition and the random partition. The approximation method is utilized to remove the fixed and the random phase partition so that the signal-to-noise ratio (SNR) may be improved. The analysis and the simulation proposed show that the method may effectively improve the performance of the OFDM system.

Key words:

inter-carrier interference (ICI); phase noise can- cellation; common phase error (CPE)

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