An embodiment is method performed by an access point (AP) for performing a joint transmission to jointly transmitting a frame to a station (STA) with one or more other APs. The method includes determining a scrambling seed that is to be used for the joint transmission, determining a basic service set (BSS) color for a virtual BSS that is jointly operated by the AP and the one or more other APs based on identifiers associated with the AP and the one or more other APs, and transmitting, as part of the joint transmission, a frame to the STA using the scrambling seed, wherein a preamble of the frame indicates the BSS color for the virtual BSS.

An embodiment is method performed by an access point (AP) for performing a joint transmission to jointly transmitting a frame to a station (STA) with one or more other APs. The method includes determining a scrambling seed that is to be used for the joint transmission, determining a basic service set (BSS) color for a virtual BSS that is jointly operated by the AP and the one or more other APs based on identifiers associated with the AP and the one or more other APs, and transmitting, as part of the joint transmission, a frame to the STA using the scrambling seed, wherein a preamble of the frame indicates the BSS color for the virtual BSS.

Systems, devices, methods, and instructions for transmitting a signal by an electronic apparatus that include generating transmission data and pseudo-random data corresponding to the transmission data, setting a first pseudo time delay interval for the transmission data and a second pseudo time delay interval for the pseudo-random data, acquiring a data signal for transmitting the transmission data to correspond to the first pseudo time delay interval and a pseudo-random signal for transmitting the pseudo-random data to correspond to the second pseudo time delay interval, and transmitting an overlapping signal including the data signal and the pseudo-random signal.

Systems, devices, methods, and instructions for transmitting a signal by an electronic apparatus that include generating transmission data and pseudo-random data corresponding to the transmission data, setting a first pseudo time delay interval for the transmission data and a second pseudo time delay interval for the pseudo-random data, acquiring a data signal for transmitting the transmission data to correspond to the first pseudo time delay interval and a pseudo-random signal for transmitting the pseudo-random data to correspond to the second pseudo time delay interval, and transmitting an overlapping signal including the data signal and the pseudo-random signal.

Method and system of electronic countermeasure comprising an airborne RF and IR decoy, being an independent, autonomous flying body that flies on its own, using its own aerodynamics, rotatable blades and fins, being applied as protection against Radio Frequency (RF) and infrared (IR) threats. Such an aircraft decoy comprises a body; a rotatable blade or vane disposed on the body; a power source capable of generating electrical current in response to rotation of the blade or vane; a wideband radar jammer responding to a radar signal with a wideband phantom radar signature corresponding to a phantom target; corner reflectors generating strong radar reflections corresponding to the phantom target; and an infrared source emitting a phantom infrared signature corresponding to a heat signature of the phantom target. Data stored within the decoy is destroyed automatically upon impact.