Abstract: Systems for providing location determination information to an assisted location service associated with a wireless communication network include a satellite positioning system receiver that generates a set of first format location information based on measurements of signals transmitted from positioning system satellites. A conversion circuit of the system, separate from the satellite positioning system receiver, is configured to receive the set of first format location information from the satellite positioning system receiver and to convert the set of first format location information to a second format, different from the first format to provide the location determination information. The system further includes a transmitter configured to transmit the location determination information to the assisted location service over the wireless communication network.

Abstract: A wireless communications mobile terminal conserves bandwidth by determining which position detection assisting devices within a position detection system are available for use and limiting ephemeris information inquiries to only those devices that are available. To make this determination, mobile terminals are provided with an almanac of position information relating to the position detection system. Once the ephemeris information is provided to the mobile terminal, the mobile terminal may determine its location relatively quickly and with a minimal imposition on the mobile network.

Abstract: Systems for providing location determination information to an assisted location service associated with a wireless communication network include a satellite positioning system receiver that generates a set of first format location information based on measurements of signals transmitted from positioning system satellites. A conversion circuit of the system, separate from the satellite positioning system receiver, is configured to receive the set of first format location information from the satellite positioning system receiver and to convert the set of first format location information to a second format, different from the first format to provide the location determination information. The system further includes a transmitter configured to transmit the location determination information to the assisted location service over the wireless communication network.

Abstract: A mobile terminal uses stored GPS data to expedite position determination when placing emergency calls. The mobile terminal receives supporting GPS data such as almanac and ephemeris information from a supporting digital wireless network when digital service is available. When operating in an analog service area where GPS data is not available from the analog wireless network, the mobile terminal uses GPS data previously received in a digital service area, unless that data is too old to be useful. Additionally, the mobile terminal can periodically update its stored GPS data while in standby in an analog service area, based on receiving the needed data directly from available GPS satellites. The mobile terminal or digital wireless network may automatically update GPS data stored in the mobile terminal based on the age of stored data, or based on the probability of moving into an analog service area.

Abstract: A mobile terminal uses stored GPS data to expedite position determination when placing emergency calls. The mobile terminal receives supporting GPS data such as almanac and ephemeris information from a supporting digital wireless network when digital service is available. When operating in an analog service area where GPS data is not available from the analog wireless network, the mobile terminal uses GPS data previously received in a digital service area, unless that data is too old to be useful. Additionally, the mobile terminal can periodically update its stored GPS data while in standby in an analog service area, based on receiving the needed data directly from available GPS satellites. The mobile terminal or digital wireless network may automatically update GPS data stored in the mobile terminal based on the age of stored data, or based on the probability of moving into an analog service area.

Abstract: A system for encoding voice while suppressing acoustic background noise and a method for suppressing acoustic background noise in a voice encoder are described herein. The voice encoder includes a sampler that captures frames of time-domain samples of an audio signal. A voice activity detector operatively coupled to the sampler determines presence or absence of speech in the current frame. A transformer is operatively coupled to the sampler for transforming the frame of time-domain audio samples into an estimate of the power spectrum of that frame. A noise model adapter operatively associated with the transformer updates a frequency-domain noise model based on the power spectrum estimate of the current frame if the voice activity detector indicates an absence of speech in this frame. A filter computation block operatively coupled to the noise model adapter and the transform computes a spectral enhancement (noise suppression) filter based on the current power spectrum estimate and the adapted noise model.