Satellite telecommunications repeaters and retransmission methods

• US 5,937,332 A
• Filed: 03/21/1997
• Issued: 08/10/1999
• Est. Priority Date: 03/21/1997
• Status: Expired due to Term

• Current Assignee: Optis Cellular Technology LLC (Brevet Capital)
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Karabinis, Peter D.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): NGUYEN, DUC M
• Application Number:
  US08/823,027
• Time in Patent Office: 872 Days
• Field of Search: 455/11.1, 455/12.1, 455/13.1, 455/427, 455/428, 455/429, 455/561, 343/702, 248/291.1
• US Class Current: 455/12.1
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/18536 Shadowing compensation therefor, e.g. by using an additional terrestrial relay

Abstract

Satellite telecommunications repeaters are provided which receive, amplify, and locally retransmit the downlink signal received from a satellite thereby increasing the effective downlink margin in the vicinity of the satellite telecommunications repeaters and allowing an increase the penetration of uplink and downlink signals into buildings, foliage, transportation vehicles, and other objects which can reduce link margin. Both portable and non-portable repeaters are provided.

Claims

1. A satellite telecommunications repeater comprising:

means for receiving downlink satellite telecommunication signals from at least one satellite;

means for amplifying said downlink satellite telecommunication signals, said means for amplifying said downlink satellite telecommunication signals having a first gain;

means for retransmitting said downlink satellite telecommunication signals from said at least one satellite to at least one radiotelephone, said means for retransmitting said downlink satellite telecommunication signals having a first isolation from said means for receiving said downlink satellite telecommunication signals;

means for receiving uplink satellite telecommunication signals from said at least one radiotelephone;

means for amplifying said uplink satellite telecommunication signals from said at least one radiotelephone, said means for amplifying said uplink satellite telecommunication signals having a second gain; and

means for retransmitting said uplink satellite telecommunication signals from said at least one radiotelephone to said at least one satellite, said means for retransmitting said uplink telecommunication signals having a second isolation from said means for receiving said uplink satellite telecommunication signals;

wherein said first gain produced by said means for amplifying said downlink satellite telecommunication signals does not exceed said first isolation, and wherein said second gain produced by said means for amplifying said uplink satellite telecommunication signals does not exceed said second isolation;

wherein said uplink and said downlink satellite telecommunications signals are only amplified and are not processed by said satellite telecommunications repeater;

a portable hand-held housing, said satellite telecommunications repeater being embodied in said portable hand-held housing;

wherein said means for receiving said downlink satellite telecommunications signals and said means for retransmitting said uplink satellite telecommunications signals further comprise a patch antenna assembly integral with a flap movably mounted to said housing of said satellite telecommunications repeater;

at least one extension on said hand-held housing, wherein said portable hand held housing is maintained at a desired orientation by said at least one extension and said at least one extension may be positioned to place said housing in said desired orientation; and

means, responsive to said means for receiving said downlink telecommunications signals, for assisting an operator to align said satellite telecommunications repeater in relation to said at least one satellite to increase received signal strength.

2. The satellite telecommunications repeater of claim 1 further comprising:

means, responsive to said means for receiving said downlink telecommunications signals, for determining said downlink signal strength; and

an operator display of downlink signal strength such that the satellite telecommunications repeater can be aligned in relation to said at least one satellite to achieve increased received signal strength.

3. A satellite radiotelephone communications system comprising:

at least one satellite;

at least one radiotelephone;

means for processing satellite radiotelephone telecommunication signals between said satellite and said radiotelephone; and

a satellite telecommunications repeater placed in sufficient proximity to said radiotelephone to receive, amplify, and retransmit uplink and downlink satellite telecommunication signals between said satellite and said radiotelephone, said satellite telecommunications repeater further comprising;

means for receiving downlink satellite telecommunication signals from said at least one satellite;

means for amplifying said downlink satellite telecommunication signals from said at least one satellite;

means for retransmitting said downlink satellite telecommunication signals from said at least one satellite to said at least one radiotelephone;

means for receiving uplink satellite telecommunication signals from said at least one radiotelephone;

means for amplifying said uplink satellite telecommunication signals from said at least one radiotelephone; and

means for retransmitting said uplink satellite telecommunication signals from said at least one radiotelephone to at least one satellite;

a portable hand-held housing, said satellite telecommunications repeater being embodied in said portable hand-held housing;

wherein said means for receiving said downlink satellite telecommunications signals and said means for retransmitting said uplink satellite telecommunications signals further comprise a patch antenna assembly integral with a flap movably mounted to said housing of said satellite telecommunications repeater;

at least one extension on said hand-held housing, wherein said portable hand held housing is maintained at a desired orientation by said at least one extension and said at least one extension may be positioned to place said housing in said desired orientation; and

means, responsive to said means for receiving said downlink telecommunications signals, for assisting an operator to align said satellite telecommunications repeater in relation to said at least one satellite to increase received signal strength;

wherein said uplink and said downlink satellite telecommunications signals are only amplified and are not processed by said satellite telecommunications repeater.

4. The satellite radiotelephone communications system of claim 3 further comprising:

means, responsive to said means for receiving said downlink telecommunications signals, for determining said downlink signal strength; and

an operator display of downlink signal strength such that the satellite telecommunications repeater can be aligned in relation to said at least one satellite to achieve increased received signal strength.

5. A method of satellite radiotelephone communications comprising the steps of:

providing a satellite telecommunications repeater embodied in a portable hand-held housing, said repeater including at least one extension on said hand-held housing, a patch antenna assembly integral with a flap movably mounted to said housing of said satellite telecommunications repeater, and means for assisting an operator to align said satellite telecommunications repeater in relation to at least one satellite to increase received signal strength;

positioning the at least one extension to place said hand-held housing in a desired orientation and thereby maintaining said portable hand-held housing at the desired orientation;

receiving downlink satellite telecommunication signals from at least one satellite using the patch antenna assembly;

amplifying said downlink satellite telecommunication signals;

retransmitting said downlink satellite telecommunication signals to at least one radiotelephone;

receiving uplink satellite telecommunication signals from said at least one radiotelephone;

amplifying said uplink satellite telecommunication signals; and

retransmitting said uplink satellite telecommunication signals to said at least one satellite using the patch antenna assembly;

wherein said downlink satellite telecommunication signals are not processed between said steps of receiving and retransmitting said downlink satellite telecommunication signals;

wherein said uplink satellite telecommunication signals are not processed between said steps of receiving and retransmitting said uplink satellite telecommunication signals; and

wherein said steps of receiving, amplifying and retransmitting are performed within said portable hand-held housing.

6. A satellite telecommunications repeater comprising:

means for receiving downlink satellite telecommunication signals from at least one satellite;

means for amplifying said downlink satellite telecommunication signals;

means for retransmitting said downlink satellite telecommunication signals from said at least one satellite to at least one radiotelephone;

means for receiving uplink satellite telecommunication signals from said at least one radiotelephone;

means for amplifying said uplink satellite telecommunication signals from said at least one radiotelephone; and

means for retransmitting said uplink satellite telecommunication signals from said at least one radiotelephone to said at least one satellite;

wherein said uplink and said downlink satellite telecommunications signals are only amplified and are not processed by said satellite telecommunications repeater;

a portable hand-held housing, said satellite telecommunications repeater being embodied in said portable hand-held housing;

wherein said means for receiving said downlink satellite telecommunications signals and said means for retransmitting said uplink satellite telecommunications signals further comprise a patch antenna assembly integral with a flap movably mounted to said housing of said satellite telecommunications repeater;

at least one extension on said hand-held housing, wherein said portable hand held housing is maintained at a desired orientation by said at least one extension and said at least one extension may be positioned to place said housing in said desired orientation; and

means, responsive to said means for receiving said downlink telecommunications signals, for assisting an operator to align said satellite telecommunications repeater in relation to said at least one satellite to increase received signal strength.

7. The satellite telecommunications repeater of claim 6 further comprising:

means, responsive to said means for receiving said downlink telecommunications signals, for determining said downlink signal strength; and

an operator display of downlink signal strength such that the satellite telecommunications repeater can be aligned in relation to said at least one satellite to achieve increased received signal strength.