Accelerated satellite acquisition scheme
a satellite acquisition and satellite technology, applied in the field of satellite communications networks, can solve the problems of not being able to see satellites in both leo and meo, and not being able to be desired
Inactive Publication Date: 2018-06-14
THE BOEING CO
View PDF8 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention is a method and apparatus for establishing communication with a satellite using a reconfigurable phased array antenna with multiple antenna elements. The apparatus can broaden the field of regard of the antenna, receive signals from multiple satellites, and select the desired satellite for communication based on the attributes of the received signals. The invention also includes a mechanism for switching to a directional mode and tracking the selected satellite. The technical effects of the invention include improved signal quality, reduced signal interference, and efficient use of the available satellite resources.
Problems solved by technology
A problem exists in that satellites in both LEO and MEO are not visible from any given point on the Earth at all times, unlike GEO satellites.
Specifically, this feature benefits the normal communication channel speed, but it is not desired during acquisition of the satellite signal.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023]In the following description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration a specific embodiment in which the invention may be practiced. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention.
[0024]System Description
[0025]FIG. 1 is a diagram showing an exemplary communications system, according to one embodiment. The communications system comprises a satellite network 100 that includes one or more satellites 102, and one or more satellite-capable user terminals 104 are provided, which are also labeled as a terrestrial user terminal 104 and an airborne user terminal 104 in FIG. 1, for communicating with the satellites 102.
[0026]Also in the example of FIG. 1, the satellite network 100 includes a ground station 106 for transmitting and receiving data to and from the satellites 102....
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A user terminal includes a reconfigurable phased array antenna having a plurality of antenna elements. The user terminal is operable for: broadening a field of regard of the reconfigurable phased array antenna; receiving signals from a plurality of satellites within the field of regard using the reconfigurable phased array antenna; determining one or more attributes of the received signals for each of the satellites; and selecting one of the plurality of satellites for communication based on the attributes of the received signals. After the satellite has been selected, the user terminal is configured for: switching to a directional mode for the reconfigurable phased array antenna; establishing the communication with the selected satellite using the reconfigurable phased array antenna; and tracking the selected satellite. Ephemeris data broadcast by the satellites is used by the user terminal to track the satellites and to perform handovers between satellites.
Description
BACKGROUND INFORMATION1. Field[0001]The present invention relates to satellite communications networks, and in particular to an accelerated satellite acquisition scheme for satellite-capable user terminals.2. Description of the Related Art[0002]In recent years, there has been an increased demand for wireless communications services. Various capabilities and services are being integrated into mobile devices, including the use of satellites operating in low Earth orbit (LEO) and medium Earth orbit (MEO), as well as geostationary or geosynchronous Earth orbit (GEO).[0003]LEO is the simplest and cheapest for satellite placement, and it provides high bandwidth and low latency for communications services. Similarly, the most common use for satellites in MEO is for communications services, although navigation and geodetic / space environment science applications use MEO as well.[0004]A problem exists in that satellites in both LEO and MEO are not visible from any given point on the Earth at ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01S19/28H01Q21/22H01Q21/24H01Q3/34H01Q21/20
CPCG01S19/28H01Q21/22H01Q21/205H01Q3/34H01Q21/245H01Q1/50H01Q3/28H01Q21/29H01Q21/293H04B7/0691H04B7/0874H04B7/18513H04B7/18517H01Q3/26H04B7/18519H01Q1/38H01Q21/065H01Q1/16H01Q1/22
Inventor FERIA, YING J.WHELAN, DAVIDRAMANUJAM, PARTHASARATHY
Owner THE BOEING CO