Abstract:
Provided are apparatus and methods for ranging between a plurality of wireless devices. An exemplary method includes, at a first wireless device, transmitting a primary portion symbol comprising a first packet and transmitting a secondary portion symbol. The secondary portion symbol is transmitted simultaneously at a lower transmit power than the primary portion symbol, and the secondary portion symbol comprises a second packet identical to the first packet. The primary portion symbol can be transmitted in a first channel having a substantially 20 MHZ bandwidth and the secondary portion can be transmitted in a second channel having a substantially 20 MHZ bandwidth. The first and second channels are substantially adjacent in frequency. After transmitting the primary portion symbol, for example, a high-throughput long-training-field symbol or a very-high-throughput long-training-field symbol can be repetitively transmitted. This exemplary method enhances time-of-arrival estimation accuracy, minimizes decoding bottlenecking, and maximizes wireless device range.
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 operations and/or techniques for enhanced passive positioning with adaptive round trip time (RTT)-type ranging, such as for use in or with a mobile communication device, for example.
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 operations and/or techniques for enhanced passive positioning with adaptive round trip time (RTT)-type ranging, such as for use in or with a mobile communication device, for example.
Abstract:
Disclosed embodiments pertain to a method on a UE may comprise determining a first absolute position of the UE at a first time based on GNSS measurements from a set of satellites. At a second time subsequent to the first time, the UE may determine a first estimate of displacement of the UE relative to the first absolute position using non-GNSS measurements. Further, at the second time, the UE may also determine a second estimate of displacement relative to the first absolute position and/or a second absolute position of the UE based, in part, on: the GNSS carrier phase measurements at the first time from the set of satellites, and GNSS carrier phase measurements at the second time from a subset comprising two or more satellites of the set of satellites, and the first estimate of displacement of the UE.
Abstract:
Methods, apparatuses, systems, and devices are described for wireless communication in an unlicensed spectrum. In one method, a clear-to-send (CTS) signal may be employed to manage or otherwise limit potential interference for communications in the unlicensed spectrum. For example, communications using long term evolution (LTE) may employ an unlicensed spectrum, particularly for small cell deployment. In such case, the LTE communications may be protected from interference due to communications by other networks, such as WiFi, using the unlicensed spectrum.
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a serving base station. The serving base station receives channel feedback from a plurality of UEs. The channel feedback is based on predetermined phase rotations used by the serving base station. The serving base station selects at least one UE of the UEs for a data transmission based on the received channel feedback. The serving base station maps at least one data stream to a set of resource blocks. The serving base station transmits the set of resource blocks to the at least one UE with a phase rotation determined based on the predetermined phase rotations.
Abstract:
Methods, systems, and devices are described for detecting dedicated short range communications (DSRC) transmissions to determine whether to use at least a portion of the DSRC spectrum. In one embodiment, a multi-mode device may be operated outside of the DSRC spectrum using a first clock rate, and may then be switched to a second clock rate while operating outside of the DSRC spectrum to detect DSRC transmissions using the DSRC spectrum.
Abstract:
Methods, systems, and devices for wireless communication are described. A wireless device may identify a configuration for transmitting ranging signals in a vehicle-based communication system. The configuration may identify a plurality of channels to be used for the ranging signals and timing for the ranging signals. The wireless device may transmit the configuration to a receiver and transmit ranging signals based at least in part on the configuration. The receiver may use the ranging signals to determine a distance between the receiver and the wireless device. The receiver may use the determined distance to update positioning information or operate a motor vehicle.
Abstract:
Disclosed embodiments pertain to a method on a UE may comprise determining a first absolute position of the UE at a first time based on GNSS measurements from a set of satellites. At a second time subsequent to the first time, the UE may determine a first estimate of displacement of the UE relative to the first absolute position using non-GNSS measurements. Further, at the second time, the UE may also determine a second estimate of displacement relative to the first absolute position and/or a second absolute position of the UE based, in part, on: the GNSS carrier phase measurements at the first time from the set of satellites, and GNSS carrier phase measurements at the second time from a subset comprising two or more satellites of the set of satellites, and the first estimate of displacement of the UE.
Abstract:
Disclosed are implementations that include a method, at a mobile device, including receiving multiple broadcast messages transmitted by multiple stationary wireless devices, and obtaining first information relating to each of the multiple broadcast messages, with at least some of the first information being included in the multiple broadcast messages, and second information relating to at least one earlier broadcast communication received by at least one of the multiple stationary wireless devices, prior to transmission of the at least one of the multiple broadcast messages, from at least one other of the multiple stationary wireless devices, with the second information included in the at least one of the multiple broadcast messages. The method also include determining location information for the mobile device based on the first information, the second information, and known positions of at least some of the multiple stationary wireless devices.