论文标题
光子学辅助模拟宽带自我干扰取消带有自适应数字振幅和延迟预匹配的频段全双工模拟系统
Photonics-assisted analog wideband self-interference cancellation for in-band full-duplex MIMO systems with adaptive digital amplitude and delay pre-matching
论文作者
论文摘要
通过自适应数字振幅和延迟预先匹配的型号，基于双重输入多输出（IBFD）多输入多输入（IBFD）多输入多输入（MIMO）系统，提出了基于Dial-Parallel-Parallel Machhhnder模量（dp-mzmms）的，提出了带有光子辅助的宽带宽带RF自我干扰（SI）取消和频率下调方法。 In each MIMO receiving antenna, the received signal, including different SI signals from different transmitting antennas and the signal of interest, is applied to one arm of the upper dual-drive Mach-ehnder modulator (DD-MZM) of the DP-MZM, the reference signal is applied to the other arm of the upper DD-MZM, and the local oscillator signal is applied to the lower DD-MZM. SI信号在上部DD-MZM的光学域中取消，并在光反射后实现频率下调。为了取消SI信号，参考信号是在数字域中构建的，而构造参考的幅度和延迟是通过高精度上的升级来以数字化调整的。当使用两个不同的SI信号时，进行实验。遗传算法和最小二乘算法分别与分段的搜索相结合，分别搜索SI信号重建，振幅和延迟预匹配。对于1-bbaud 16正交调制正交频划分多路复用信号，可以实现大约20 dB的取消深度。
A photonics-assisted analog wideband RF self-interference (SI) cancellation and frequency downconversion approach for in-band full-duplex (IBFD) multiple-input multiple-output (MIMO) systems with adaptive digital amplitude and delay pre-matching is proposed based on a dual-parallel Mach-Zehnder modulator (DP-MZM). In each MIMO receiving antenna, the received signal, including different SI signals from different transmitting antennas and the signal of interest, is applied to one arm of the upper dual-drive Mach-ehnder modulator (DD-MZM) of the DP-MZM, the reference signal is applied to the other arm of the upper DD-MZM, and the local oscillator signal is applied to the lower DD-MZM. The SI signals are canceled in the optical domain in the upper DD-MZM and the frequency downconversion is achieved after photodetection. To cancel the SI signals, the reference signal is constructed in the digital domain, while the amplitude and delay of the constructed reference are adjusted digitally by upsampling with high accuracy. Experiments are performed when two different SI signals are employed. The genetic algorithm and least-squares algorithm are combined with segmented searching respectively for the SI signal reconstruction and amplitude and delay pre-matching. A cancellation depth of around 20 dB is achieved for the 1-Gbaud 16 quadrature-amplitude modulation orthogonal frequency-division multiplexing signal.
