Abstract: Disclosed are systems, devices and methods for determining an angle of arrival (AoA) of a signal transmitted between devices. Particular implementations enable obtaining measurements of AoA from signals that are not pure tone signals. In one aspect, a reference signal may emulate one or more aspects of a packet signal as transmitted by a transmitter. An AoA of the packet signal may be determined based, at least in part, on the packet signal and the reference signal.

Abstract: Embodiments relate to a deployment of a master radio in conjunction with one or more slave radios. The master radio coordinates with a UE, or transmitter, to transmit a particular known set of wireless signals in a defined time window over a dedicated wireless connection between the UE and the master radio. The master radio separately coordinates with the one or more slave radios to monitor for and measure the dedicated wireless connection during the defined time window (e.g., to obtain AoA measurements, signal strength measurements, etc.). The measurements can be reported to the master radio or a separate measurement processing unit to facilitate a location determination of the UE.

Abstract: Disclosed are systems, devices and methods for determining an angle of arrival (AoA) of a signal transmitted between devices. Particular implementations enable obtaining measurements of AoA from signals that are not pure tone signals. In one aspect, a reference signal may emulate one or more aspects of a packet signal as transmitted by a transmitter. An AoA of the packet signal may be determined based, at least in part, on the packet signal and the reference signal.

Abstract: Disclosed are systems, devices and methods for determining a range between devices based, at least in part, on measurements of wireless tone signals transmitted between devices. In particular, two devices may measure tone signals transmitted between the two devices for determination of a round-trip phase measurement. Obtaining multiple round-trip measurements from tone signals transmitted at different carrier frequencies may enable resolving at least some range ambiguities.

Abstract: Embodiments relate to a deployment of a master radio in conjunction with one or more slave radios. The master radio coordinates with a UE, or transmitter, to transmit a particular known set of wireless signals in a defined time window over a dedicated wireless connection between the UE and the master radio. The master radio separately coordinates with the one or more slave radios to monitor for and measure the dedicated wireless connection during the defined time window (e.g., to obtain AoA measurements, signal strength measurements, etc.). The measurements can be reported to the master radio or a separate measurement processing unit to facilitate a location determination of the UE.

Abstract: In an embodiment, an apparatus measures, via a first directional receive antenna array and a second directional receive antenna array that are each coupled to an apparatus, one or more signals that are transmitted by one or more transmitters of the UE. The first and second directional receive antenna arrays are oriented at different directions. The apparatus determines first and second representative values for the first and second directional receive antenna arrays, respectively based on some or all of the measurements. The apparatus determines whether the UE is within a given region based on the first and second representative values.

Abstract: Disclosed are systems, devices and methods for determining a range between devices based, at least in part, on measurements of wireless tone signals transmitted between devices. In particular, two devices may measure tone signals transmitted between the two devices for determination of a round-trip phase measurement. Obtaining multiple round-trip measurements from tone signals transmitted at different carrier frequencies may enable resolving at least some range ambiguities.

Abstract: A method of determining Doppler shift of a received audio chirp signal, the received audio chirp signal having a receive frequency profile Doppler shifted relative to a transmit frequency profile that the received audio chirp signal was transmitted with. The method comprises: correlating the received audio chirp signal with a replica audio chirp signal to form a correlation output; identifying a relative alignment of the received audio chirp signal and the replica audio chirp signal to be that at which the received audio chirp signal and the replica audio chirp signal are most highly correlated; and determining the Doppler shift to be that corresponding to the identified relative alignment.

Abstract: A controller for controlling a system of speakers, the system of speakers being configured to play out audio signals. The controller is configured to, for each speaker of the system of speakers, (i) transmit a signal to that speaker comprising identification data for that speaker, and (ii) transmit a signal to that speaker comprising an indication of a playout time for playing out an identification sound signal comprising the identification data of that speaker. The controller is configured to receive data indicative of a played out identification sound signal from each speaker as received at a listening location, compare the played out identification sound signals received from the speakers, and based on that comparison, control the speakers to adjust parameters of audio signals played out from the speakers so as to align those played out audio signals at the listening location.

Abstract: A controller for determining the location of speakers in a system of speakers configured to play out audio signals received according to a wireless communications protocol. The controller configured is to, for each speaker of the system of speakers, transmit a signal to that speaker comprising an indication of a playout time for playing out an identification sound signal comprising the identification data of that speaker. The controller is configured to receive data indicative of a played out identification sound signal from each speaker as received at least two listening locations, wherein relative positional information about the at least two listening locations is known. For each of the at least two listening locations, the controller determines the locations of the speakers of the speaker system relative to the position of one of the at least two listening locations.

Abstract: A method of communicating data imperceptibly in an audio signal. The method comprises, for each sub-band of the audio signal, identifying the tone in that sub-band having the highest amplitude. An audio code comprising the data to be communicated is scaled by a frequency mask profile, the frequency mask profile having maxima at the frequencies of the identified tones. The audio signal and the scaled audio code are aggregated to form a composite audio signal. The composite audio signal is then transmitted.