Multiple antenna interference rejection in ultra-wideband real time locating systems

摘要

Systems, methods, apparatuses, and computer readable media are disclosed for providing interference rejection in ultra-wideband real time locating systems. In one embodiment, an ultra-wideband (UWB) receiver is configured to: receive an interference signal from a source positioned outside a monitored region; receive a composite signal transmitted from a tagged object moving about a playing field within the monitored region, wherein the composite signal comprises a location signal and a component of the interference signal; detect whether the component of the interference signal exceeds a threshold value; and adjust, via a processor, filtering of the composite signal to attenuate the component of the interference signal based on whether the component of the interference signal exceeds the threshold value. Some embodiments provide for filtering of the composite signal using a combiner while others employ a tunable notch filter. Corresponding systems, methods, and computer-readable storage medium are also provided.

主权项

1. An ultra-wideband (UWB) receiver comprising:
a first antenna configured to receive a first signal, the first signal comprising a UWB signal and a first component of an interference signal; a second antenna configured to receive a second signal, the second signal comprising at least a second component of the interference signal; and a combiner configured to:
receive the first signal from the first antenna;receive the second signal from the second antenna; andcombine the first signal and the second signal to generate an output signal providing cancellation of at least part of the first component of the inference signal based at least in part on the second component of the interference signal; a detector configured to:
receive the output signal of the combiner; andindicate an interference level associated with the output signal; a controller configured to:
monitor the interference level associated with the output signal; andadjust at least one of a variable attenuator and a variable phase shifter in an instance in which the monitored interference level is above a threshold level, the variable attenuator and the variable phase shifter configured to:
modify the second signal received from the second antenna; andprovide the modified second signal to the combiner; the controller further configured to:
determine a first ratio of a signal strength of the interference signal to a ultra-wideband signal received by the second antenna; andcause the interference signal and the ultra-wideband signal received by the second antenna to be summed in opposition to the first signal in an instance in which the first ratio is greater than a second ratio of a signal strength of the interference signal to a ultra-wideband signal received by the first antenna; and the combiner further configured to:
combine the first signal with the summed interference signal and the ultra-wideband signal to enable cancellation of the interference signal.