Qualcomm Incorporated

Neevan Ramalingam

Roberto Rimini

Anant Gupta

Sheng-Yuan Tu

Ahmad Bassil Zoubi

An apparatus is disclosed that implements interference and/or clutter cancellation using cross-channel equalization. In example aspects, the apparatus includes a wireless transceiver configured to be connected to multiple feed ports. The wireless transceiver is also configured to transmit an electromagnetic signal using a first feed port of the multiple feed ports. A modulated spur is generated based on the transmission of the electromagnetic signal. The wireless transceiver is additionally configured to receive two versions of a receive signal respectively via two feed ports of the multiple feed ports. The receive signal comprises the modulated spur and a mutual-coupling component associated with the transmission of the electromagnetic signal. The wireless transceiver is further configured to generate a filtered signal by attenuating the mutual-coupling component and the modulated spur within one of the two versions of the receive signal using cross-channel equalization.

Interference and/or clutter cancellation using cross-channel equalization

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless device may transmit a frequency-modulated continuous-waveform (FMCW) dual ramp radar signal over a time duration that sweeps from a first frequency to a second frequency and from the second frequency to the first frequency. The wireless device may receive a reflection of the radar signal with a first reflected part that corresponds to the first part of the radar signal and a second reflected part that corresponds to the second part of the radar signal. The wireless device may compare the first reflected part and a time-inverted version of the second reflected part to estimate a noise pattern. The wireless device may perform an action based at least in part on the noise pattern. Numerous other aspects are described.

Noise estimation with signal ramps for radar

In some aspects, a radar device may receive a plurality of received signals comprising a plurality of reflected frequency modulated continuous wave radar signals and phase noise. The radar device may obtain a frequency-domain representation of the received signals comprising a plurality of frequency-domain spectrums. The radar device may determine a shaped noise component of the frequency-domain representation corresponding to a negative distance portion of the frequency-domain representation. The radar device may determine a shaped decision boundary for target detection based at least in part on the shaped noise component, wherein the shaped decision boundary corresponds to a positive distance portion of the frequency-domain representation. The radar device may detect a radar target based at least in part on the shaped decision boundary. The radar device may perform an action based at least in part on detecting the radar target. Numerous other aspects are described.

Growing community of inventors

San Diego, CA, United States of America

Neevan Ramalingam