A method for transmitting a bit sequence to be transmitted at a frequency f.sub.b. A set of codes is determined in advance, wherein each code is associated with a possible value from a block of N.sub.b bits, and each code includes an ordered set of N.sub.s binary symbols intended to be transmitted at a frequency f.sub.s. The method includes splitting the bit sequence into N blocks of N.sub.b bits, the frequency f.sub.s and the numbers N and N.sub.b being selected such that N.sub.s×f.sub.b=N×N.sub.b×f.sub.s, associating a code with each of the N blocks according to the value from the blocks, interleaving the binary symbols of the N codes respectively corresponding to the N blocks of bits to be transmitted, the interleaved binary symbols being transmitted at a frequency f.sub.c such that N×f.sub.s=f.sub.c.

Methods, systems, and devices for wireless communications are described. In a wireless communications system, one or more user equipments (UEs) may implement distance-limited sidelink-based ranging techniques. An initiating UE may transmit one or more positioning reference signal (PRS) request messages to one or more target UEs via a sidelink channel. In some cases, the initiating UE may receive one or more response messages from at least one target UE that is located within a threshold distance from the initiating UE. In some examples, based on receiving the one or more response messages, the initiating UE may transmit PRSs to each target UE that transmitted a response message.

A transmitter at a first location transmits the message at a symbol rate of the reference clock using a first carrier, whose phase is locked to a phase of the reference clock and whose frequency is a first integer times a frequency of the reference clock. It also transmits the message at the symbol rate of the reference clock using a second carrier, whose phase is locked to the phase of the reference clock and whose frequency is a second integer times the frequency of the reference clock. The second integer is unequal to the first integer. A receiver at a second location receives the message at the first carrier and at the second carrier, and accurately determines a time of a first phase difference between the first carrier and the second carrier. It determines a time of receiving the message from the time of the first phase difference.

Disclosed herein are methods, devices, and systems for determining geographic location and time. In one embodiment, a radio and a processor configured for deriving a first signal tone originating from a first remote antenna located at a first location; deriving a second signal tone originating from a second remote antenna located at a second location; deriving a third signal tone originating from a third remote antenna located at a third location; determining a first frequency and a first phase at a first time of the first signal tone; determining a second frequency and a second phase at a second time of the second signal tone; and determining a third frequency and a third phase at a third time of the third signal tone. The method further includes determining a geographic location based on the first, second, and third frequencies; the first, second, and third phases; and the first, second, and third locations.

Disclosed are techniques for positioning a user equipment (UE). In aspects, a listening node determines a first time of arrival (ToA) at the listening node of a first radio frequency (RF) signal sent by a transmission-reception point (TRP) to the UE, determines a second ToA at the listening node of a second RF signal sent by the UE to the TRP, determines a time difference between the first ToA and the second ToA, and enables a positioning entity to estimate a location of the UE based on the time difference. The positioning entity calculates a distance between the listening node and the UE based on the time difference, a propagation time between the TRP and the listening node, a propagation time between the TRP and the UE, and a time difference between a ToA of the first RF signal at the UE and a transmission time of the second RF signal.

A method for signal measuring, a terminal and a network-side device are provided. The method is applied to a terminal, and the method includes: receiving a measurement-configuration information sent by a network-side device, wherein the measurement-configuration information contains at least a reported group quantity of a measured value of a target measurement parameter, and the target measurement parameter refers to a parameter of a target measurement signal; according to the measurement-configuration information, measuring the target measurement parameter; and sending the measured value of the target measurement parameter to the network-side device. The embodiments of the method solve the problem that, in the conventional 5G NR system, the configuration information for reference signals has not been complete.

An example method of determining a position of a mobile device includes, for each of a plurality of anchor points, receiving respective relative position information between the respective anchor point and the mobile device such that the received relative position information for the plurality of anchor points forms a set of position information, each relative position information including at least one of: a direction between the respective anchor point and the mobile device, a distance between the respective anchor point and the mobile device, or a direction and a distance between the respective anchor point and the mobile device. The method includes determining an estimated position of the mobile device based on the set of position information; defining a set of loci, each locus of the set of loci being based on one or more of the relative position information from the set of position information; determining, for each locus of the set of loci, a distance value between the estimated position of the mobile device and the respective locus; determining, for each locus of the set of loci, a weight factor as a function of the determined distance values; and determining a refined position of the mobile device based on the set of position information and the determined weight factors. A positioning engine for determining a position of a mobile device is disclosed as well.

Disclosed are some examples of techniques for positioning of a user equipment (UE) using positioning reference signal (PRS). One or more units of messages may be communicated between an initiator UE and a responder UE. A unit of message may include a pre-PRS message, a PRS message and a post-PRS message. The pre-PRS message and the post-PRS message may be sent or received using a license spectrum. The PRS message may be sent or received using an unlicensed spectrum. The communication between the initiator UE and the responder UE may be initiated by the initiator UE identifying the responder UE from a plurality of UEs based on positioning properties of the responder UE. The positioning properties of the responder UE may include one or more of a direction, a velocity, a location confidence and a location of the responder UE.

Systems, methods, and devices for wireless communication that support mechanisms for determining a joint priority of sidelink and access link (Uu) positioning reference signal (PRS) transmissions in a wireless communication system. A joint priority of a PRS transmission may refer to a priority of the PRS transmission over the entire set of PRS transmissions including sidelink PRS transmissions and Uu PRS transmissions transmitted to a target UE in a sidelink positioning session. In aspects, a joint priority of a sidelink PRS transmission from an anchor UE may be determined with respect to not only other sidelink transmissions, but also with respect to other Uu PRS transmissions from other anchor base stations. Similarly, a joint priority of a Uu PRS transmission from an anchor base station may be determined with respect to not only other Uu transmissions, but also with respect to other sidelink PRS transmissions from other anchor UEs.

A positioning method includes: establishing a positioning session between a plurality of positioning devices including a first positioning device and a second positioning device; obtaining line-of-sight/non-line-of-sight status (LOS/NLOS status) for a plurality of positioning device pairs, each being a pair of the plurality of positioning devices; and transmitting a disable message to the first positioning device based on the LOS/NLOS status of at least one of the first positioning device or the second positioning device being non-line-of-sight relative to at least a subset of the plurality of positioning devices, the disable message indicating to disable at least one of transmission of one or more first positioning reference signals from the first positioning device or measurement of one or more second positioning reference signals from the second positioning device by the first positioning device.