Abstract: The subject matter disclosed herein relates to systems, methods, apparatuses, devices, articles, and means for updating radio models. For certain example implementations, a method for one or more server devices may comprise receiving at one or more communication interfaces at least one measurement that corresponds to a position of a first mobile device within an indoor environment. At least one radio model that is stored in one or more memories may be updated based, at least in part, on the at least one measurement to produce at least one updated radio model. The at least one radio model and the at least one updated radio model may correspond to the indoor environment. The at least one updated radio model may be transmitted to enable a second mobile device to use the at least one updated radio model for positioning within the indoor environment. Other example implementations are described herein.

Abstract: Methods and apparatuses that apply a time-varying delay to symbols to be transmitted from one or more antennas are provided.

Abstract: Calibration for a transmit chain of a device transmitting information to multiple devices over wireless links and receive chains of the multiple devices receiving information over one of the wireless links utilizing each of the estimates for different antennas of an access terminal as a separate estimate.

Abstract: Certain embodiments of the present disclosure allow for detection of a transmitted preamble sequence by processing a correlation of a received signal and a preamble hypothesis in a way that exploits the good correlation properties of the known set of preamble sequences. For certain embodiments, the highest peaks of the correlation output may be compared across all preamble hypotheses to decide which preamble sequence is transmitted.

Abstract: Methods and apparatuses that apply a time-varying delay to symbols to be transmitted from one or more antennas are provided. One such method may include providing a first symbol comprising a first plurality of samples to a first antenna. The first symbol is provided to a second antenna after a first delay period. A second symbol comprising a second plurality of samples is provided to the first antenna. The second symbol is provided to the second antenna after a second delay period that is different than the first delay period.

Abstract: Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate or support one or more navigation or positioning operations or techniques using, for example, a non-map-based location or routing interface for use in or with mobile communication devices.

Abstract: Techniques are provided which may be implemented using various methods and/or apparatuses to allow a mobile station to request and receive translation information associated with a location (e.g., a region, a point of interest, etc.). The translation information may be based, at least in part, on historical information associated with at least one other request associated with the location and previously obtained from at least one other mobile station.

Abstract: Techniques to facilitate estimating the frequency response of a wireless channel in an OFDM system are provided. The method and systems allow for combining signal information across multiple communication channels at one or more channel tap delays in order to determine appropriate taps for channel information.

Abstract: A method and apparatus for transmitting a ChannelMeasurementReport message in a wireless communication system, comprising generating a ChannelMeasurementReport message comprising a 8 bit MessageID field, a 12 bit PilotPN field that indicates the PilotPN of a sector for which a measurement was performed, a 2 bit CarrierID field that indicates a carrier on which the measurements are performed, a 40 bit StartPHYFrameNumber field that indicates a frame number of a PHYFrame where an access terminal made a first measurement reported in the message, a 8 bit MeasurementInterval field that indicates a number of PHYFrames between measurements made by the access terminal, and a 8 bit NumMeasurements field that indicates number of measurements included in the message and transmitting the ChannelMeasurementReport message over a communication link. A method and apparatus is also provided for receiving and processing the ChannelMeasurementReport message.

Abstract: Techniques for sending and receiving signaling in a wireless communication system are described. Multiple (e.g., eight) vectors of modulation symbols may be defined and may be orthogonal to one another. Multiple subscriber stations may share transmission resources and may simultaneously send different vectors of modulation symbols in the same tile. Each subscriber station may be assigned multiple sets of at least one vector of modulation symbols usable by that subscriber station to convey signaling, e.g., one set of three vectors for acknowledgement (ACK) and another set of three vectors for negative acknowledgement (NAK). Each subscriber station may send one set of at least one vector in at least one tile to convey a signaling value. Different subscriber stations may simultaneously send different sets of at least one vector in the at least one tile to convey their signaling values.

Abstract: An appliance facilitates localization of a station (STA) in a network, for example, a short-range wireless network. An automatic response to a request for a measurement related communication is provided. The appliance can include a radio frequency (RF) interface and a media access control (MAC) section. The MAC section can receive the request and generate the automatic response immediately after a uniform period that is uniform among any such appliance within the network. The appliance performs only the generation of the automatic response, though the response can include additional information such as (x, y) coordinates of the appliance.

Abstract: Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The patterns may be selected according to a location of the mobile station with respect to one or more antennas are provided. In some aspects, the pattern may be selected based upon the distance between the mobile station and the one or more antennas. In other aspect, the pattern may be based upon whether the mobile station is in handoff.

Abstract: Techniques are provided which may be implemented in various methods and/or apparatuses to allow a portable electronic device to at least estimate its current position while within or otherwise operatively associated with an operating environment that may have one or more identifiable zones that present a reduced wireless communication condition.

Abstract: A method for efficiently performing ranging in a wireless communication network may be implemented by a mobile station. The method may include sending a ranging code to a base station. The method may also include receiving a ranging response message from the base station. The method may also include determining whether a ranging failure condition is satisfied. The ranging failure condition may relate to something other than a duration of time. The method may further include re-sending the ranging code to the base station if the ranging failure condition is satisfied.

Abstract: Techniques for provided which may be implemented using various methods and/or apparatuses to allow a mobile device to identify and select certain wireless transmitting devices for use in estimating a location of the mobile device. For example with one method, a mobile device may identify a plurality of wireless transmitting devices from which measurements are obtainable to estimate a location of the mobile device, and select a set of wireless transmitting devices based, at least in part, on a location reliability indicator.

Abstract: The subject matter disclosed herein relates to a system and method for receiving, by a first mobile station, a signal transmitted from a second mobile station and addressed to a communication device (e.g., a communication device having a known location). The signal comprises a location estimate for the second mobile station. A range from the first mobile station to the second mobile station is estimated based at least in part on a measured signal strength of the received signal.

Abstract: Techniques are provided that may be implemented in various methods and apparatuses to allow an electronic device to determine when it is transitioning or has transitioned from a first environment to a second environment based, at least in part, on at least one measured parameter. The measured parameter may be based, at least in part, on one or more received wireless signals associated with one or more wireless signal transmitters, and/or one or more signals associated with one or more non-radio sensors. The electronic device may then affect operation of a navigation function (e.g., having a trajectory estimation filter) based, at least in part, on the measured parameter.

Abstract: The subject matter disclosed herein relates to systems, methods, devices, articles, apparatuses, means, etc. for mobile device positioning in a constrained environment. For certain example implementations, a method may comprise obtaining an estimated velocity distribution and an estimated direction of movement distribution of a mobile device for a current position based at least in part on routability information for a constrained environment. A subsequent position of the mobile device may be estimated based at least in part on the estimated velocity distribution and the estimated direction of movement distribution for the current position. Other example implementations are described herein.

Abstract: Techniques are provided which may be implemented in various methods and/or apparatuses to allow a portable electronic device to characterize and/or otherwise identify that certain wireless signals may be multipath signals and/or non-multipath signals. Given such signal/environment characterization information, a portable electronic device may select particular wireless signals for use in signal-based location estimation process and/or other communication processes.

Abstract: A method and apparatus for requesting a ChannelMeasurementReport in a wireless communication system are described.