Abstract:
Methods, systems, computer-readable media, and apparatuses for using a smart meter as a reliable crowd-sourcing agent are presented. In some embodiments, a smart meter installed at a location may observe one or more wireless signals at the location. Subsequently, the smart meter may provide, to at least one signal almanac server, information that identifies the location and describes one or more detected properties of the one or more observed wireless signals. In at least one arrangement, the information provided to the at least one signal almanac server may be configured to be used by the at least one signal almanac server in providing position assistance information to one or more mobile devices located in a vicinity of the location.
Abstract:
Methods and apparatus are directed to mobile devices utilizing motion and/or position sensors for improving operating performance and/or power efficiency. In one example, a method for reducing power consumption in a mobile device includes receiving movement information, establishing movement data based on the movement information, determining if the mobile device is stationary using the movement data; and reducing the frequency of searching for a base station when the mobile device is stationary. In another example, a mobile device which reduces power consumption based upon movement data includes an RF front end, a receiver coupled to the RF front end, a data demodulator coupled to the receiver, a searcher, coupled to the RF front end and the receiver, which searches for base stations, and a processing unit coupled to the searcher, wherein the processing unit controls the searcher based upon the stationarity of the mobile device.
Abstract:
A communication repeater for use in conjunction with a base transceiver subsystem (BTS) of a wireless communication system (Fig. 2). The repeater expands the coverage area of the BTS and allows receivers to identify whether the source of a communication signal was directly from a BTS or was broadcast by a repeater (Fig. 2, 212). Identification of the signal source facilitates position determination, particularly in hybrid position determination systems. The repeater implements differential delay modulation of the transmitted signal. The repeater re-transmits the original BTS signal as well as a time delayed version of the signal. Additionally, the repeater introduces synthetic path diversity in the form of spatial diversity or polarity diversity to de-correlate the re-transmitted original signal from the time delayed signal. The repeater can broadcast the delayed signal with the same power as the re-transmitted original signal or can attenuate the delayed signal relative to the re-transmitted original signal.
Abstract:
Techniques are provided which may be implemented using various methods and/or apparatuses in a receiver and/or other like device to determine an SPS time using SPS signals based on a correlation process. A verification process may be performed, for example, that verifies a maximum peak in comparison with other peak information resulting from the correlation process, for example, by considering a ratio of a maximum peak to a next maximum peak. A time-setting algorithm may be selected, for example, based, at least in part, on a time uncertainty and/or on a type of demodulation performed on the SPS signal. The time-setting algorithm may operatively control one or both of the correlation and/verification processes in a desired manner given the time uncertainty and/or type/mode of demodulation performed.
Abstract:
The subject matter disclosed herein relates to determining a location of a mobile device using more than one location-determining technology.
Abstract:
Methods and apparatuses are provided for use by, or use with or in, a portable wireless device that allow for a wireless network signal acquisition rate to based, at least in part, on movement data associated with the portable wireless device.
Abstract:
Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered "half-symbols" and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the lenght (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodualted symbols. One or more correlators can be assigned to process one or more instances of each transmiteed signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being prcessed by that correlator.