Disclosed are techniques for wireless communication. In an aspect, a band-pass filter of a radio frequency front end (RFFE) of a user equipment (UE) receives an analog radio frequency (RF) signal having a first bandwidth associated with a first sampling rate, the analog RF signal comprising a positioning reference signal (PRS). An analog-to-digital converter (ADC) of the UE samples the analog RF signal at a second sampling rate to generate a digital RF signal representing the analog RF signal, wherein the ADC operates at a second bandwidth lower than the first bandwidth, and wherein the second sampling rate is lower than the first sampling rate by an inverse of a folding factor for the first bandwidth. The digital RF signal is then output to a baseband processor of the UE.

An apparatus, computer program and method is described comprising: obtaining, at a receiver, during a first phase of operation, one or more first downlink positioning reference samples from each of a plurality of communication nodes of a mobile communication system, wherein the receiver operates in a wide-beam or omnidirectional mode during the first phase of operation; determining first response estimates of channels between the receiver and each of said each communication nodes, based on the positioning reference samples obtained for the respective communication node; selecting, for each communication node, a receiver beam for receiving positioning signals from the respective communication node, based, at least in part, on the respective first channel response estimate; and receiving, at the receiver, in a second phase of operation, one or more second downlink positioning reference samples from each of the plurality of communication nodes using the selected receiver beams.

Methods and systems are provided for determining a location of a device. The methods can include receiving information associated with a device, which can include one or more radio frequency (RF) signal strength values associated with communication between the device and at least one antenna element of an antenna array. The methods can also include, determining, based at least partly on the information associated with the device, a location for the device.

A system including a polarized RF scanning reference source and one or more cavity sensor receivers.

A method includes: acquiring, from a first communication terminal of a first user via a network, i) a request for an advertisement corresponding to a store and ii) a device identifier (ID) specifying a beacon signal transmitter disposed in the store, the beacon signal being received from the beacon signal transmitter; determining, based on the device ID, one branch store; generating, based on limited product information, the request for the advertisement, and branch store information, privileged advertisement information; and outputting the privileged advertisement information to the first communication terminal.

A beacon signal transmitter is disposed in a store. A first communication terminal within a reception range of a beacon signal transmitted from the beacon signal transmitter receives the beacon signal. The first communication terminal receives a push notification corresponding to the store from a store management system. The first communication terminal issues, based on the push notification, a request for a purchase menu corresponding to the store. Based on limited product information and the request for the purchase menu, privileged purchase menu information in which a limited product indicated by the limited product information is added to the purchase menu is generated. The privileged purchase menu information is output to the first communication terminal.

A method includes: acquiring, from a store terminal via a network, limited product information indicating a limited product for which a time available for sale in one branch store corresponding to the store terminal is limited; acquiring, from a communication terminal of a user via the network, i) a request for a purchase menu of affiliated stores and ii) a branch store identifier (ID) specifying one branch store corresponding to a device ID specifying a beacon signal transmitter disposed in the one branch store; generating, based on the limited product information, the request for the purchase menu, and the branch store ID, privileged purchase menu information corresponding to the one branch store; and outputting the privileged purchase menu information to the communication terminal.

A communications system, including at least one tag and a plurality of beacons. The tags are configured to detect beacon advertisement messages, initiate a connection with at least one of the plurality of and transmit a Constant Tone (CT) to the at least one of the plurality of beacons. The tag is further configured to determine a location thereof based on the sampled CT from both the beacon and the tag and then report the location via the one of the beacons and/or an access point. Phase ranging mitigation techniques which include hop duplication, hop interpolation and ADC DC offset correction are employed so as to provide more accurate ranging values even in the case where there are many other devices in local proximity and which are competing for use of the same RF channels as those used by the tags and beacons.

A wireless receiver receives location pilots embedded in received symbols and uses the location pilots to detect the first path for every base station the network has designated for the receiver to use in time of arrival estimation. The receiver preferably applies matching pursuit strategies to offer a robust and reliable identification of a channel impulse response's first path. The receiver may also receive and use estimation pilots as a supplement to the location pilot information in determining time of arrival. The receiver can use metrics characteristic of the channel to improve the robustness and reliability of the identification of a CIR's first path. With the first path identified, the receiver measures the time of arrival for signals from that path and the receiver determines the observed time difference of arrival (OTDOA) to respond to network requests for OTDOA and position determination measurements.

Co-channel beacon transmissions are provided with at least one of spectral redundancy and temporal redundancy. A receiver produces a snapshot of a superposition of received co-channel beacon transmissions. Subcarrier demodulation, code nulling, or a Class-C linear minimum-mean-square error (MMSE) operation separates multiples ones of the co-channel beacon transmissions or eliminates inter-symbol interference and inter-subcarrier interference in the snapshot. Receiver operations can be performed at a network user, a network node, or a network operations center.