Common-Channel Optical Physical-Layer Network Coding
Publication in refereed journal


摘要We propose and experimentally demonstrate a coherent optical physical-layer network coding scheme on polarization-multiplexed differential quaternary phase-shift keying (PM-DQPSK) signals, in which the two PM-DQPSK signal components in the network-coded signal occupy the same channel and cannot be separated by conventional means of demultiplexing. In the scheme, network coding at intermediate nodes is realized by combining the two PM-DQPSK signals with a coupler. For network decoding at terminal nodes, one of the signal components is reconstructed and subtracted from the network-coded signal to obtain the other signal component. From its known bit sequence, waveform reconstruction of the signal to be subtracted is implemented by a lookup table. Carrier phase estimation for the reconstructed waveform utilizes the property that DQPSK signals have constant modulus at the sampling point. Experimental results show that, for 12-GBd PM-DQPSK signals, network decoding at a bit error rate of 10(-3) can be achieved, with 2.1-dB optical signal-to-noise ratio penalty relative to back-to-back transmission.
著者Li M, Wu YJ, Chen LK, Liew SC
期刊名稱IEEE Photonics Technology Letters
出版社Institute of Electrical and Electronics Engineers (IEEE)
頁次1340 - 1343
關鍵詞Coherent optical fiber communication; optical fiber networks; optical physical-layer network coding (PNC); quaternary phase-shift keying (QPSK)
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC; Optics; OPTICS; Physics; Physics, Applied; PHYSICS, APPLIED

上次更新時間 2021-27-11 於 00:08