This paper studies the joint digital self-interference (SI) cancellation and data detection in an orthogonal-frequency-division-multiplexing (OFDM) full-duplex (FD) system, considering the effect of phase noise introduced by the oscillators at both the local transmitter and receiver. In particular, an universal iterative two-stage joint SI cancellation and data detection framework is considered and its performance bound independent of any specific estimation and detection methods is derived. First, the channel and phase noise estimation mean square error (MSE) lower bounds in each iteration are derived by analyzing the Fisher information of the received signal. Then, by substituting the derived MSE lower bound into the SINR expression, which is related to the channel and phase noise estimation MSE, the SINR upper bound in each iteration is computed. Finally, by exploiting the SINR upper bound and the transition information of the detection errors between two adjacent iterations, the universal bit error rate (BER) lower bound for data detection is derived.

翻译：本文研究正交频分复用（OFDM）全双工（FD）系统中联合数字自干扰（SI）消除与数据检测问题，同时考虑本地发射机与接收机振荡器引入的相位噪声影响。具体而言，本文探讨了一种通用的迭代式两阶段联合自干扰消除与数据检测框架，并推导了其与具体估计及检测方法无关的性能界。首先，通过分析接收信号的费希尔信息，推导了每次迭代中信道与相位噪声估计均方误差（MSE）下界；其次，将所得MSE下界代入与信道及相位噪声估计MSE相关的信干噪比（SINR）表达式中，计算出每次迭代的SINR上界；最后，利用SINR上界及相邻两次迭代间检测误差的转移信息，推导了数据检测的通用误码率（BER）下界。