Hybrid system for position determination by a mobile communications terminal

申请公布号：US2002135510(A1)

申请号：US20010880807

申请日期：2001.06.15

申请公布日期：2002.09.26

申请人：

BRUNO RONALD C.;SCHUCHMAN LEONARD

发明人：BRUNO RONALD C.;SCHUCHMAN LEONARD

分类号：G01S1/00;G01S5/00;(IPC1-7):G01S5/14;G01C21/28

主分类号：G01S1/00

摘要：A mobile unit includes a network receiver, such as a GSM telephone, for communication with a wireless network, and a navigation receiver, such as a global positioning system (GPS) receiver for receiving navigation signals. The navigation receiver includes a vector delay lock loop (VDLL) that receives information concerning the navigation sources, such as satellite data messages, transmitted over a common broadcast channel of the wireless network, and receives navigation signals from the navigation receiver. The VDLL uses the navigation signals received from navigation sources that are not obscured and uses satellite data messages broadcast over the wireless network to track a navigation signal that is received only intermittently due, for example, to the navigation source being obscured from view of the mobile unit.

Method and apparatus to facilitate the electronic accumulation and redemption of a value in an account

XML serialization and deserialization

Domain manager and method of use

Computer system for portable digital data capture and data distribution

System and methods for acoustic and language modeling for automatic speech recognition with large vocabularies

Medical image management system

Topical aminolevulinic acid-photodynamic therapy for the treatment of acne vulgaris

Use

Lithographic printing plate precursor and lithographic printing method

Carbon-substituted diketopiperazine delivery systems

Emulsion formulations for hydrophilic active agents

Multilayer plain bearing

Strained dislocation-free channels for CMOS and method of manufacture

Multiple directional scans of test structures on semiconductor integrated circuits

Memory devices having sharp-tipped phase change layer patterns and methods of forming the same

Method and device for carrying out working steps on miniaturized modules

Process for producing single-crystal semiconductor and apparatus for producing single-crystal semiconductor

Automotive clamp accessory

Self-spacing pleated filter insert

Baby diaper changing station