In this paper, we investigate the secure rate-splitting for the two-user multiple-input multiple-output (MIMO) broadcast channel with imperfect channel state information at the transmitter (CSIT) and a multiple-antenna jammer, where each receiver has an equal number of antennas and the jammer has perfect channel state information (CSI). Specifically, we design a secure rate-splitting multiple-access strategy, where the security of split private and common messages is ensured by precoder design with joint nulling and aligning the leakage information, regarding different antenna configurations. Moreover, we show that the sum-secure degrees-of-freedom (SDoF) achieved by secure rate-splitting is optimal and outperforms that by conventional zero-forcing. Therefore, we reveal the sum-SDoF of the two-user MIMO broadcast channel with imperfect CSIT and a jammer, and validate the superiority of rate-splitting for the security purpose in this scenario with emphasis of MIMO.

翻译：在本文中,我们调查了双用户多投入多产出(MIMO)广播频道的安全分率,该频道在发射机(CSI)和多屏蔽干扰器的频道状态信息不完善,每个接收器拥有同等数量的天线,干扰器拥有完美的频道状态信息(CSI ) 。 具体地说,我们设计了安全的分率多接入战略,通过编码前设计,联合取消和统一泄漏信息,确保了分离的私人和共同信息的安全性。此外,我们还表明,安全分率实现的零位平衡安全度自由度(SDoF)是最佳的,优于常规零力断层。 因此,我们披露了双用户IMIMO广播频道的SDoF和不完善的CSIT和干扰器,并证实了这一情景中为安全目的分率的优势,重点是MIMO。