Author Affiliations
Abstract
Key Lab of Broadband Optical Fiber Communication and Communication Networks Technology, University of Electronic Science and Technology of China, Chengdu 610054
2 We discuss several kinds of code schemes and analyze their spectral efficiency, code utilizing efficiency, and the maximal spectral efficiency. Error correction coding is used to increase the spectral efficiency, and it can avoid the spectral decrease with the increase of the length. The extended primer code (EPC) has the highest spectral efficiency in the unipolar code system. The bipolar code system has larger spectral efficiency than unipolar code system, but has lower code utilizing efficiency and the maximal spectral efficiency. From the numerical results, we can see that the spectral efficiency increases by 0.025 (b/s)/Hz when the bit error rate (BER) increases from 10^{-1} to 10^{-7}.
光码分多址 误比特率 频谱效率 频谱利用率 最大频谱效率 070.4790 Spectrum analysis 220.4830 Systems design 220.4840 Testing 020.1670 Coherent optical effects Chinese Optics Letters
2009, 7(3): 03183
