摘要:
Systems and methods are disclosed herein to provide improved communication system test techniques. For example, in accordance with an embodiment of the present invention, a wireless device test system is disclosed having a channel emulator for multipath and/or MIMO applications to allow the testing of wireless devices (e.g., WLAN devices) in a cabled environment.
摘要:
In one embodiment of the invention, a symbol rate detector includes a nonlinear device to receive a pass band signal, a component to apply a Fourier Transform to a signal provided by the filter, and logic to select a peak frequency component from results of applying the Fourier Transform and to apply the peak frequency component as a symbol rate of a base band signal corresponding to the pass band signal.
摘要:
A system and method for discriminating and mitigating spoofing signals incoming to a satellite navigation system. Beam steering techniques are used to steer a null toward a legitimate satellite signal that is being spoofed. The spoofing signal is then tracked and its angle of arrival measured. A null is steered toward the measured angle of arrival of the spoofing signal, and the spoofing signal is confirmed by determining if there is a signal remaining with nulls on both the legitimate satellite signal and the spoofing signal. The null toward the legitimate satellite signal is then replaced with unity gain.
摘要:
A system and method for discriminating and mitigating spoofing signals incoming to a satellite navigation system. Beam steering techniques are used to steer a null toward a legitimate satellite signal that is being spoofed. The spoofing signal is then tracked and its angle of arrival measured. A null is steered toward the measured angle of arrival of the spoofing signal, and the spoofing signal is confirmed by determining if there is a signal remaining with nulls on both the legitimate satellite signal and the spoofing signal. The null toward the legitimate satellite signal is then replaced with unity gain.
摘要:
A multi-receiver wireless communication device includes a transmitter, a transmit oscillator communicatively coupled to the transmitter, a receive oscillator communicatively coupled to a first receiver and second receiver, and a switching assembly having a first state in which the receive oscillator is coupled to the first and second receivers and a second state in which the receive oscillator is de-coupled from the second receiver and the transmit oscillator is coupled to the second receiver. The first receiver and the second receiver of the wireless communication device are able to operate independent of one another when the switching assembly is in the second state.
摘要:
A multi-receiver wireless communication device includes a transmitter, a transmit oscillator communicatively coupled to the transmitter, a receive oscillator communicatively coupled to a first receiver and second receiver, and a switching assembly having a first state in which the receive oscillator is coupled to the first and second receivers and a second state in which the receive oscillator is de-coupled from the second receiver and the transmit oscillator is coupled to the second receiver. The first receiver and the second receiver of the wireless communication device are able to operate independent of one another when the switching assembly is in the second state.
摘要:
Systems and methods are disclosed herein to provide improved communication system test techniques. For example, in accordance with an embodiment of the present invention, a wireless device test system is disclosed having a channel emulator for multipath and/or MIMO applications to allow the testing of wireless devices (e.g., WLAN devices) in a cabled environment.