公开(公告)号：US20210044305A1

公开(公告)日：2021-02-11

申请号：US16979749

申请日：2019-06-26

Applicant: Beijing University of Posts and Telecommunications

Inventor： Kai NIU ,  Yan LI

IPC: H03M13/13 ,  H04L1/00 ,  G06F13/16

Abstract: A polar code construction method, apparatus, electronic device, and readable storage medium, applied to the field of wireless communication technology to reduce the complexity of polar code construction. The method comprises: calculating a weight spectrum corresponding to a polarized channel of a polar code with code length 2N based on the weight spectrum corresponding to the polarized channel with code length N, and MacWilliams identities; calculating, for each polarized channel, a union bound on the error probability of the polarized channel under the condition of additive white Gaussian noise based on the weight spectrum corresponding to the polarized channel and a union bound formula; determining the error probability threshold values based on the union bounds and a measurement method; sorting the error probability threshold values of all the polarized channels in ascending order, and selecting the polarized channels corresponding to the K smallest error probability threshold values.

公开(公告)号：US20170264369A1

公开(公告)日：2017-09-14

申请号：US15455645

申请日：2017-03-10

Applicant: Beijing University of Posts and Telecommunications

Inventor： Yan LI ,  Miao YU ,  Jian WU ,  Jiangchuan PANG ,  Deming KONG

IPC: H04B10/516 ,  H04B1/00

CPC classification number: H04B10/5161 ,  H04B1/0042 ,  H04B10/5561 ,  H04L1/00

Abstract: The embodiments of the present application disclose a method and device for sending and receiving an optical signal. The method for sending an optical signal comprises: performing serial-to-parallel conversion on a data signal to be transmitted to obtain an I path data sequence, a Q path data sequence and a PPM path data sequence which are in parallel; performing mPQ-encoding on the I path data sequence, the Q path data sequence and the PPM path data sequence to obtain an I path and a Q path of an mPQ-encoded digital signal; shaping the I path and the Q path of the mPQ-encoded digital signal by Nyquist-filtering to obtain an I path and Q path of a filtered digital signal; performing digital-to-analog conversion on the I path and the Q path of the filtered digital signal and mapping the converted I path and Q path onto an optical carrier to obtain a target optical signal and send the same. By applying the embodiments of the present application, spectral efficiency loss in optical communication can be reduced or even eliminated while power efficiency is increased.

公开(公告)号：US20150349880A1

公开(公告)日：2015-12-03

申请号：US14726655

申请日：2015-06-01

Applicant: Beijing University of Posts and Telecommunications

Inventor： Jifang QIU ,  Bo YUAN ,  Jian WU ,  Yan LI ,  Xiaobin HONG ,  Hongxiang GUO ,  Jintong LIN

IPC: H04B10/079 ,  H04J14/02

CPC classification number: H04B10/07953

Abstract: An apparatus and a method for monitoring in-band OSNR (Optical Signal-to-Noise Ratio) which monitors the in-band OSNR by using two parallel Mach-Zehnder-interferometers with different optical time delays are disclosed. The apparatus and method can be resistant to chromatic dispersion, polarization mode dispersion and polarized noise, can measure the coherence characteristics of the signal without removing the noise, and can be manufactured into a semiconductor integrated device and be applied in the future high-speed optical network.

Abstract translation: 公开了一种通过使用具有不同光学时间延迟的两个并联马赫 - 曾德干涉仪来监视带内OSNR的带内OSNR（光信噪比）的装置和方法。 该装置和方法可以抵抗色散，偏振模色散和极化噪声，可以测量信号的相干特性而不消除噪声，并且可以制造成半导体集成器件并应用于未来的高速光学 网络。