Integrated photonic RF self-interference cancellation on a silicon platform for full-duplex communication  

作　　者：XIUYOU HAN XINXIN SU MENG CHAO XINDI YANG WEIHENG WANG SHUANGLING FU YICHENG DU ZHENLIN WU MINGSHAN ZHAO 

机构地区：[1]School of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian 116024,China

出　　处：《Photonics Research》2023年第10期1635-1646,共12页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(62075026, 61875028);National Key Research and Development Program of China (2019YFB2203202);Liaoning Revitalization Talents Program (XLYC2002111);Program for Liaoning Excellent Talents in University(LR2019017);Fundamental Research Funds for the Central Universities (DUT22ZD202)。

摘　　要：In-band full-duplex(IBFD) technology can double the spectrum utilization efficiency for wireless communications,and increase the data transmission rate of B5G and 6G networks and satellite communications. RF self-interference is the major challenge for the application of IBFD technology, which must be resolved. Compared with the conventional electronic method, the photonic self-interference cancellation(PSIC) technique has the advantages of wide bandwidth, high amplitude and time delay tuning precision, and immunity to electromagnetic interference.Integrating the PSIC system on chip can effectively reduce the size, weight, and power consumption and meet the application requirement, especially for mobile terminals and small satellite payloads. In this paper, the silicon integrated PSIC chip is presented first and demonstrated for IBFD communication. The integrated PSIC chip comprises function units including phase modulation, time delay and amplitude tuning, sideband filtering, and photodetection, which complete the matching conditions for RF self-interference cancellation. Over the wide frequency range of C, X, Ku, and K bands, from 5 GHz to 25 GHz, a cancellation depth of more than 20 dB is achieved with the narrowest bandwidth of 140 MHz. A maximum bandwidth of 630 MHz is obtained at a center frequency of10 GHz. The full-duplex communication experiment at Ku-band by using the PSIC chip is carried out. Cancellation depths of 24.9 dB and 26.6 dB are measured for a bandwidth of 100 MHz at central frequencies of 12.4 GHz and14.2 GHz, respectively, and the signal of interest(SOI) with 16-quadrature amplitude modulation is recovered successfully. The factors affecting the cancellation depth and maximum interference to the SOI ratio are investigated in detail. The performances of the integrated PSIC system including link gain, noise figure, receiving sensitivity, and spurious free dynamic range are characterized.

关 键 词：COMMUNICATION tuning DUPLEX 

分 类 号：TN929.1[电子电信—通信与信息系统]