Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2006, Vol. 29 ›› Issue (1): 30-34.doi: 10.13190/jbupt.200601.30.zhanghj

• Review • Previous Articles     Next Articles

Noise Analysis for Direct Detection Optical Receivers

ZHANG Hui-jian,ZUO Meng,GU Wan-yi   

  1. Optical Communication Center, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2004-12-28 Online:2006-02-28 Published:2006-02-28
  • Contact: ZHANG Hui-jian E-mail:zhj_79_0@263.net

Abstract:

An optical receiver model based on narrowband Guassion process was proposed. Moreover, the receiver model based on Karhunen-Loève transform was improved to include the main transmission impairments in wavelength division multiplexing system. The statistics of the decision current in two models were obtained and turned out to be consistent in some degree. The two analytical results show exact agreement with that of Monte-Carlo simulations, so they are reliable for accurate estimation of bit error ratio (BER). By comparison with the analytical results, Gaussion approximation method tends to overestimate the BER whose application is restricted within narrow limits. The improved Karhunen-Loève transform approach is of great scalability, with which more factors can be taken into account through proper modification, so it can serve as a general method for performance evaluation of IM-DD optical transmission systems.

Key words: optical fiber communication technology, bit error ratio, ultra-long haul transmission, wavelength division multiplexing

CLC Number: