发明专利
JP2012248944A Frequency offset estimation device, frequency offset estimation method and digital coherent receiver
审中-公开
基本信息:
- 专利标题: Frequency offset estimation device, frequency offset estimation method and digital coherent receiver
- 专利标题(中):频率偏移估计设备,频率偏移估计方法和数字相关接收机
- 申请号:JP2011117013 申请日:2011-05-25
- 公开(公告)号:JP2012248944A 公开(公告)日:2012-12-13
- 发明人: OKAMOTO MASAAKI
- 申请人: Sumitomo Electric Ind Ltd , 住友電気工業株式会社
- 专利权人: Sumitomo Electric Ind Ltd,住友電気工業株式会社
- 当前专利权人: Sumitomo Electric Ind Ltd,住友電気工業株式会社
- 优先权: JP2011117013 2011-05-25
- 主分类号: H04B10/04
- IPC分类号: H04B10/04 ; H04B10/02 ; H04B10/06 ; H04B10/142 ; H04B10/152 ; H04B10/18 ; H04J14/00 ; H04J14/04 ; H04J14/06 ; H04L27/22
摘要:
PROBLEM TO BE SOLVED: To extend the range capable of estimating the frequency offset between transmission/reception light sources.SOLUTION: A frequency offset estimation device 20 comprises a first frequency offset estimation unit 23 which estimates a first frequency offset estimation value (a), i.e. the phase variation amount in the symbol period Tof a multilevel PSK demodulation signal sampled at a predetermined timing, a second frequency offset estimation unit 24 which estimates a second frequency offset estimation value (b), i.e. the phase variation amount in the symbol period T/N(N is an integer of 2 or more) of a multilevel PSK demodulation signal sampled at a predetermined timing, and an estimation value correction unit 25 which estimates the frequency offset between transmission/reception light sources on the basis of the first frequency offset estimation value (a) and the second frequency offset estimation value (b).
摘要(中):
要解决的问题:扩展能够估计发送/接收光源之间的频率偏移的范围。 解决方案:频率偏移估计装置20包括估计第一频率偏移估计值(a)的第一频率偏移估计单元23,即符号周期T 中的相位变化量 在预定定时采样的多电平PSK解调信号的 SB>,估计第二频偏估计值(b)的第二频偏估计单元24,即符号周期T sym SB> / N(N为2以上的整数),估计值校正单元25估计发送/接收光源 基于第一频率偏移估计值(a)和第二频率偏移估计值(b)。 版权所有(C)2013,JPO&INPIT