Improved symbol rate identification method for on–off keying and advanced modulation format signals based on asynchronous delayed sampling
作者: Sheng CuiShang JinWenjuan XiaChangjian KeDeming Liu
作者单位: 1School of Optical and Electronic Information, Huazhong University of Science and Technology, Hubei 430074, China
2National Engineering Laboratory for Next Generation Internet Access System, Wuhan, Hubei 430074, China
3Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei 430074, China
刊名: Optics Communications, 2015, Vol.354 , pp.218-224
来源数据库: Elsevier Journal
DOI: 10.1016/j.optcom.2015.05.056
关键词: Symbol rate identificationAsynchronous delayed samplingAutocorrelation functionModulationOptical fiber communication
原始语种摘要: Abstract(#br)Symbol rate identification (SRI) based on asynchronous delayed sampling is accurate, cost-effective and robust to impairments. For on–off keying (OOK) signals the symbol rate can be derived from the periodicity of the second-order autocorrelation function (ACF 2 ) of the delay tap samples. But it is found that when applied this method to advanced modulation format signals with auxiliary amplitude modulation (AAM), incorrect results may be produced because AAM has significant impact on ACF 2 periodicity, which makes the symbol period harder or even unable to be correctly identified. In this paper it is demonstrated that for these signals the first order autocorrelation function (ACF 1 ) has stronger periodicity and can be used to replace ACF 2 to produce more accurate and...
全文获取路径: Elsevier  (合作)
分享到:
来源刊物:
影响因子:1.438 (2012)

×
关键词翻译
关键词翻译
  • periodicity 周期性
  • modulation 
  • advanced 先进的
  • method 方法
  • asynchronous 异步的
  • identification 辨认
  • symbol 符号
  • sampling 取样
  • delayed 延迟的
  • proposed 建议的