Abstract:
Methods and apparatuses are provided for use with mode switchable navigation radios and the like. The methods and apparatuses may be implemented to selectively switch between certain operating modes based, at least in part, a mode-switching test that takes into consideration one or more non-timed test conditions to determine if mode-switching may be enabled.
Abstract:
Methods and apparatuses are provided for use with mode switchable navigation radios and the like. The methods and apparatuses may be implemented to selectively switch between certain operating modes based, at least in part, a mode-switch-ing test that takes into consideration one or more non-timed test conditions to determine if mode-switching may be enabled.
Abstract:
Un procedimiento que comprende: con circuitos (308) de localización de posición operando en una primera modalidad (202), adquirir señales inalámbricasasociadas a un sistema de posicionamiento por satélite, SPS (106); conmutar selectivamente dichos circuitos (308) de localización de posición, desde dicha primera modalidad (202) a unasegunda modalidad (204), en base, al menos en parte, a satisfacerse al menos una prueba de conmutación demodalidad, en el que dicha al menos una prueba de conmutación de modalidad se basa, al menos en parte, en al menosuna condición de prueba no temporizada, comprendiendo dicha al menos una condición de prueba no temporizada almenos una primera condición de prueba, en la cual se determina si las señales inalámbricas, con al menos una potenciade señal de un primer umbral, han sido adquiridas desde un primer conjunto de vehículos espaciales, SV; y con dichos circuitos (308) de localización de posición operando en dicha segunda modalidad (204), mantener informaciónde reloj local y no adquirir más dichas señales inalámbricas, o bien adquirir dichas señales inalámbricas con menosfrecuencia que durante dicha primera modalidad (202).
Abstract:
The subject matter disclosed herein relates to a system and method for reducing an initial position uncertainty of a mobile station. In one example, although claimed subject matter is not so limited, a process to improve an initial position estimate comprises identifying the locations of a serving cell and at least one other landmark proximate to a receiver and determining an initial estimate of the location of the receiver based, at least in part, on the identified locations of the serving cell and the at least one other landmark..
Abstract:
Various techniques are provided which may be implemented in a mobile device to acquire a first positioning signal transmitted by a first transmitter of a first satellite in geostationary orbit, associate the first positioning signal with a coverage region to determine a rough position of the mobile device, and affect a positioning signal search strategy based, at least in part, on the rough position of the mobile device. The search strategy may identify at least one transmitter of at least one satellite in non- geostationary orbit that is estimated to be located in a position to transmit a second positioning signal within at least a portion of the coverage region, and which may be searched for by the mobile device. Such techniques may, for example, reduce a first time to a position fix in certain instances.