An ultra-wideband receiver with enhanced signal detection capabilities is provided. In one example, the receiver includes a first processing path comprising first de-spreading circuitry that de-spreads a received UWB signal based on a first bit value to generate a first magnitude value, a second processing path comprising second de-spreading circuitry that de-spreads the received UWB signal based on a second bit value to generate a second magnitude value, and data recovery circuitry. Data recovery circuitry is configured to compare the first magnitude value to the second magnitude value and output a bit value based on the comparison.

A method for using a vehicle system that has stored a portable identifier is proposed. The system and the identifier are configured to communicate using a UWB communication protocol within a first perimeter around the vehicle and to communicate using a BLE communication protocol within a second perimeter that includes the first perimeter. The method comprises, while a user carrying the identifier is approaching the vehicle, detecting that the identifier is located within the second perimeter and performing two distance measurements between the user and the vehicle. The method then comprises determining a speed of the user and predicting a time remaining for the user to reach a predetermined near distance from the vehicle. After the predicted remaining time has elapsed, the method comprises initiating a communication using the UWB communication protocol. The method provides for improved use of the portable identifier.

The embodiments of the present disclosure disclose a method, a device, and a system for UWB communication. The UWB communication method includes: sending a ranging start frame to a plurality of second devices; receiving response frames from the plurality of second devices in a plurality of response time slots; sending a ranging end frame to the plurality of second devices; where each of the second devices maintains at least two sessions with the first device. The embodiments of the present disclosure optimize UWB ranging interactions under a plurality of sessions.