Systems, apparatuses, and methods for determining locations of wireless nodes in a network architecture are disclosed herein. In one example, a system includes a first wireless node having a wireless device with one or more processing units and RF circuitry for transmitting and receiving communications in the wireless network architecture including a first RF signal having a first packet. A second wireless node having a wireless device with a transmitter and a receiver enables bi-directional communications with the first wireless node in the wireless network architecture including a second RF signal with a second packet. The one or more processing units of the first wireless node are configured to execute instructions to determine a round trip time estimate of the first and second packets, to determine channel state information (CSI) of the first and second wireless nodes, and to calibrate hardware to determine hardware delays of the first and second wireless nodes.

Systems, apparatuses, and methods for determining locations of wireless nodes in a network architecture are disclosed herein. In one example, a system includes a first wireless node having a wireless device with one or more processing units and RF circuitry for transmitting and receiving communications in the wireless network architecture including a first RF signal having a first packet. A second wireless node having a wireless device with a transmitter and a receiver enables bi-directional communications with the first wireless node in the wireless network architecture including a second RF signal with a second packet. The one or more processing units of the first wireless node are configured to execute instructions to determine a round trip time estimate of the first and second packets, to determine channel state information (CSI) of the first and second wireless nodes, and to calibrate hardware to determine hardware delays of the first and second wireless nodes.

Systems and apparatuses for determining location of a wireless arbitrary device are disclosed herein. In one example, a computer implemented method for localization of a wireless arbitrary device in a wireless network architecture comprises initializing the wireless network architecture having a plurality of wireless anchor nodes and a plurality of wireless sensor nodes. The method further includes preparing, with the plurality of wireless anchor nodes, for localization of the wireless arbitrary device, waiting to receive a packet from the wireless arbitrary device, receiving a communication including a packet from the wireless arbitrary device, and transmitting a communication including a synchronization packet to other anchor nodes of the plurality of wireless anchor nodes.

Systems and apparatuses for determining location of a wireless arbitrary device are disclosed herein. In one example, a computer implemented method for localization of a wireless arbitrary device in a wireless network architecture comprises initializing the wireless network architecture having a plurality of wireless anchor nodes and a plurality of wireless sensor nodes. The method further includes preparing, with the plurality of wireless anchor nodes, for localization of the wireless arbitrary device, waiting to receive a packet from the wireless arbitrary device, receiving a communication including a packet from the wireless arbitrary device, and transmitting a communication including a synchronization packet to other anchor nodes of the plurality of wireless anchor nodes.

A communication device including a clock, a memory, and at least one processor is disclosed. The at least one processor is configured to execute instructions stored in the memory that cause the at least one processor to perform operations including receiving at least one message from a second communication device of a plurality of communication devices over a preconfigured time duration, determining a first local time of the clock of the communication device at which the at least one message from the second communication device is received, and determining a sync-time of the second communication device based on the at least one message from the second communication device. The operations include mapping the sync-time of the second communication device based on the first local time and the determined sync-time of the second communication device and adjusting a sync-time of the communication device based on the second local time.

A communication device including a clock, a memory, and at least one processor is disclosed. The at least one processor is configured to execute instructions stored in the memory that cause the at least one processor to perform operations including receiving at least one message from a second communication device of a plurality of communication devices over a preconfigured time duration, determining a first local time of the clock of the communication device at which the at least one message from the second communication device is received, and determining a sync-time of the second communication device based on the at least one message from the second communication device. The operations include mapping the sync-time of the second communication device based on the first local time and the determined sync-time of the second communication device and adjusting a sync-time of the communication device based on the second local time.

A method is disclosed for determining a signal's time of arrival at a receiver device, the signal being transmitted by a transmitter device to the receiver device. The method comprises correlating the signal as transmitted by the transmitter device and the signal as received by the receiver device with each other. The signal comprises in its frequency spectrum a first signal component spanning a first frequency range, a second signal component spanning a second frequency range and a third signal 5 component spanning a third frequency range. The first frequency range and second frequency range are separated by a first intermediate frequency range that does not contain a signal component of the signal. The second frequency range and third frequency range are separated by a second intermediate frequency range that does not contain a signal component of the signal. The method further comprises, based on the performed correlation, determining said time of arrival.

A method is disclosed for determining a signal's time of arrival at a receiver device, the signal being transmitted by a transmitter device to the receiver device. The method comprises correlating the signal as transmitted by the transmitter device and the signal as received by the receiver device with each other. The signal comprises in its frequency spectrum a first signal component spanning a first frequency range, a second signal component spanning a second frequency range and a third signal 5 component spanning a third frequency range. The first frequency range and second frequency range are separated by a first intermediate frequency range that does not contain a signal component of the signal. The second frequency range and third frequency range are separated by a second intermediate frequency range that does not contain a signal component of the signal. The method further comprises, based on the performed correlation, determining said time of arrival.

The invention relates to methods and systems for phase-based determination of a distance and/or a frequency offset between a first node and a second node in a wireless network. The method may comprise the first node transmitting a first request message based on a first carrier signal to the second node and receiving a plurality of first response messages from the second node, the plurality of first response messages being transmitted based on a first reference carrier signal by the second node to the first node; the first node transmitting a second request message based on a second carrier signal to the second node and the first node receiving a plurality of second response messages from the second node, the plurality of second response messages being transmitted based on a second reference carrier signal by the second node to the first node; the first node receiving a first phase difference and second phase difference from the second node, the first phase difference defining a difference between a phase of the first carrier signal and a phase of the first reference carrier signal at a predetermined time instance associated with the first request message and the second phase defining a difference between a phase of the second carrier signal and a phase of the second reference carrier signal at a predetermined time instance associated with the second request message; the first node determining a set of third phase differences and a set of fourth phase differences based on the plurality of first response messages and the plurality of second response messages respectively, each of the set of third phase differences defining a difference between a phase of the first reference carrier signal and a phase of the first carrier signal at a predetermined time instance associated with one of the plurality of first response messages; and, each of the set of fourth phase differences defining a difference between a phase of the second reference carrier signal and a phase of the second carrier signal at a predetermined time instance associated with one of the plurality of second response messages; and, the first node and/or the second node determining a distance and/or a frequency offset between the first node and the second node based on the first and second phase difference and the set of third and fourth phase differences.

The invention relates to methods and systems for phase-based determination of a distance and/or a frequency offset between a first node and a second node in a wireless network. The method may comprise the first node transmitting a first request message based on a first carrier signal to the second node and receiving a plurality of first response messages from the second node, the plurality of first response messages being transmitted based on a first reference carrier signal by the second node to the first node; the first node transmitting a second request message based on a second carrier signal to the second node and the first node receiving a plurality of second response messages from the second node, the plurality of second response messages being transmitted based on a second reference carrier signal by the second node to the first node; the first node receiving a first phase difference and second phase difference from the second node, the first phase difference defining a difference between a phase of the first carrier signal and a phase of the first reference carrier signal at a predetermined time instance associated with the first request message and the second phase defining a difference between a phase of the second carrier signal and a phase of the second reference carrier signal at a predetermined time instance associated with the second request message; the first node determining a set of third phase differences and a set of fourth phase differences based on the plurality of first response messages and the plurality of second response messages respectively, each of the set of third phase differences defining a difference between a phase of the first reference carrier signal and a phase of the first carrier signal at a predetermined time instance associated with one of the plurality of first response messages; and, each of the set of fourth phase differences defining a difference between a phase of the second reference carrier signal and a phase of the second carrier signal at a predetermined time instance associated with one of the plurality of second response messages; and, the first node and/or the second node determining a distance and/or a frequency offset between the first node and the second node based on the first and second phase difference and the set of third and fourth phase differences.