Some or all of the transceiver circuitry 224 and/or processing circuitry 226 may be included in, for example, radio frequency (RF) circuitry or baseband circuitry as described below with respect to FIG. 12. In various embodiments, the UE 220 or 210 may be, may include, or may be included in a single sensor device, a cellular telephone, a personal computer (PC), a notebook, an ultrabook, a netbook, a smartphone, an ultra mobile PC (UMPC), a handheld mobile device, a universal integrated circuit card (UICC), a personal digital assistant (PDA), a Customer Premise Equipment (CPE), a tablet computing device, or other consumer electronics such as MP3 players, digital cameras, and the like. In some embodiments, the UE may include a mobile station, as defined by IEEE 802.16e (2005 or 802.16m (2009) or some other revision of the IEEE 802.16 standard, or user equipment, as defined by 3GPP LTE Release 8 (2008), Release 9 (2009), Release 10 (2011), Release 12 (2014), Release 13 (under development), or some other revision or release of the 3GPP LTE standards.

FIG. 3 is a flowchart illustrating a process for generating D2D subframes in accordance with various embodiments. The process 300 may be performed by a UE, e.g., the UE 210 or 220 of FIG. 2 or any one of the UEs of FIG. 1, such as the UE 132, 134, or 136. In various embodiments, the process 300 may enable a UE to accommodate the AGC setting time and the Tx/Rx switching time needed between two D2D subframes or in D2D and WAN subframe boundaries.