System and method for full-duplex operation in a wireless communications system

A method for transmitting a full-duplex frame includes scheduling a first flexible allocation resource of a frame as a first resource for a second device served by the first device, scheduling a second flexible allocation resource of the frame as a second resource for a third device served by the first device, and generating the frame including the flexible allocation resources and a first half-duplex training period configured to convey a first training signal, where the first half-duplex training period and the first training signal facilitate an estimation of a channel impulse response (CIR) of a communications channel between a transmit antenna of the first device and a receive antenna of the first device. The method also includes transmitting the frame, and simultaneously receiving the frame. 种用于发送全双工帧的方法，包括：将帧的第灵活分配资源调度为由第设备服务的第二设备的第资源，将所述帧的第二灵活分配资源调度为由所述第设备服务的第三设备的第二资源，并生成所述帧，所述帧包括所述灵活分配资源和被配置用于传送第训练信号的第半双工训练周期，其中所述第半双工训练周期和所述第训练信号促进对所述第设备的发射天线与所述第设备的接收天线之间的通信信道的信道冲激响应(CIR)的估计。所述方法还包括发送所述帧，以及同时接收所述帧。