In the in-band full-duplex(FD) systems, the self-interference (SI) power can be more than 100 dB higher than the power of the received data signal. In order to enable the FD transmission, several SI cancelation stages are needed in a FD transceiver. By combining the cancelation at the radio frequency (RF) with a specially designed antenna and cancelation circuitry and SI cancelation at the digital baseband, the required level of SI cancelation can be achieved even with a non-linear power amplifier. In this paper, a FD transceiver architecture is modeled with simulation tools that allow to use realistic antenna and analog transceiver models and at the same time enable algorithm studies. The analog SI cancelation at the RF is controlled by the baseband digital processing unit, and the tuning of the RF canceler is performed with an automatic gain control enhanced iterative algorithm. The combined cancelation performance of the antenna and RF canceler varies between 62 and 82 dB depending on the studied cases. The digital baseband SI cancelation is based on the Hammerstein model in order to take the power amplifier non-linearity into account. The coefficients of the Hammerstein model are estimated with a self-orthogonalizing adaptive algorithm. When realistic phase noise and IQ imbalance values are taken into account, the SI after all the cancelation stages can decrease the signal-to-interference-and-noise-ratio (SINR) by few decibels (dB). In order to further enhance the SI cancelation, the Hammerstein based SI canceler is extended to cancel also the effect of the receiver IQ imbalance. With the extended baseband canceler, the cancelation performance is mainly limited by the phase noise

在带内全双工（FD）系统中，自干扰（SI）功率可能比接收到的数据信号的功率高100 dB以上。为了实现FD传输，在FD收发器中需要几个SI消除阶段。通过将射频（RF）上的消除与专门设计的天线，消除电路和数字基带上的SI消除相结合，即使使用非线性功率放大器，也可以实现所需的SI消除级别。在本文中，采用仿真工具对FD收发器体系结构进行建模，该仿真工具允许使用实际的天线和模拟收发器模型，并同时启用算法研究。RF处的模拟SI消除由基带数字处理单元控制，RF抵消器的调谐通过自动增益控制增强的迭代算法执行。天线和RF抵消器的组合抵消性能在62到82 dB之间变化，具体取决于所研究的情况。数字基带SI消除基于Hammerstein模型，以便考虑功率放大器的非线性。Hammerstein模型的系数是使用自正交自适应算法估算的。如果考虑到实际的相位噪声和IQ不平衡值，则在所有取消阶段之后的SI都可以将信号干扰噪声比（SINR）降低几分贝（dB）。为了进一步增强SI消除，扩展了基于Hammerstein的SI消除器，以消除接收器IQ不平衡的影响。