Dynamic repeater configuration for multilink satellite systems with robust subchannel interconnect capability

• US 6,341,213 B1
• Filed: 08/11/1999
• Issued: 01/22/2002
• Est. Priority Date: 08/11/1999
• Status: Expired due to Term

• Current Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Original Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Inventors: Wu, Shih-Chang
• Primary Examiner(s): Trost, William
• Assistant Examiner(s): Ferguson, Keith
• Application Number:
  US09/372,532
• Time in Patent Office: 895 Days
• Field of Search: 455/12.1, 455/13.3, 455/13.4, 455/427, 455/428, 455/20, 455/22, 455/429, 455/430, 455/11.1, 455/15, 370/316, 370/323, 370/322, 370/315, 370/916, 342/358, 342/359, 342/368, 342/352
• US Class Current: 455/12.1
• CPC Class Codes: H04B 7/18515 Transmission equipment in satellites or space-based relays

Abstract

A dynamic repeater configuration for satellite systems is disclosed that allows for multiple broadcast of channel information and multiple subchannel allocations on uplink and downlink beam signals. The apparatus comprises an input multiplexer, a subchannel routing switch matrix, a channel routing switch matrix, and an output multiplexer. The input multiplexer receives the uplink signal and produces at least a first channel signal therefrom. The subchannel routing switch matrix receives the uplink signal, separates at least one channel signal into at least one subchannel, routes the subchannel from a selected uplink subchannel into a selected downlink subchannel, and recombines the selected downlink subchannels into a second channel signal. The channel routing switch matrix routes the first channel signal into a first downlink channel signal and the second channel signal into a second downlink channel signal. The output multiplexer combines the first and second downlink channels into the downlink signal.

Claims

1. A dynamic repeater apparatus for interconnecting communication channels and subchannels between an uplink signal and a downlink signal, comprising:

an input multiplexer for receiving the uplink signal and for producing at least a first channel signal therefrom;

a subchannel routing switch matrix for receiving the uplink signal, for separating at least one channel signal into at least one subchannel, for routing the subchannel from a selected uplink subchannel into a selected downlink subchannel, and for recombining the selected downlink subchannels into a second channel signal; and

a channel routing switch matrix, coupled to the input multiplexer through a first input and coupled to the subchannel routing switch matrix through a second input, for routing the first channel signal into a first downlink channel signal and the second channel signal into a second downlink channel signal; and

an output multiplexer for collecting the first and second downlink channels and combining them into the downlink signal.

2. The repeater apparatus of claim 1, wherein the communication channels are transmitted at radio frequencies.

3. The repeater apparatus of claim 1, wherein the subchannel routing switch matrix separates multiple channel signals into multiple subchannel signals and recombines the multiple subchannel signals into selected multiple downlink channel signals.

4. The repeater apparatus of claim 3, wherein the downlink signal contains subchannel signals in more than one downlink channel.

5. A dynamic repeater apparatus for interconnecting communication channels and subchannels between a uplink receive signal and a downlink signal, comprising:

a power divider, for receiving the uplink receive signal and for dividing the uplink receive signal into at least two uplink signals;

a common intermediate frequency (IF) unit, comprising;

(1) a downconverting mixer, for frequency shifting the uplink signal from a frequency of the uplink receive signal to an intermediate frequency (IF) signal having an IF frequency;

(2) a filter, for separating the IF signal into at least a first channel signal at the IF frequency; and

(3) an upconverting mixer, for frequency shifting the first channel signal at the IF frequency to a channel signal at a second frequency;

a subchannel routing switch matrix for receiving the uplink receive signal, for separating the uplink receive signal into at least one subchannel signal, for routing the subchannel signal from a selected uplink subchannel into at least one selected downlink subchannel, and for recombining the selected downlink subchannels into a second channel signal;

a channel routing switch matrix, coupled to the common IF unit through a first input of the channel routing switch matrix and coupled to the subchannel routing switch matrix through a second input of the channel routing switch matrix, for routing the first channel signal into a first downlink channel signal and for routing the second channel signal into a second downlink channel signal; and

an output multiplexer for collecting the first and second downlink channel signals and combining them into a downlink signal.

6. The repeater system of claim 5, wherein the channel routing switch matrix is coupled to the common IF unit at an output of the filter, wherein the channel routing switch matrix routes the first channel signal into a first downlink channel signal and routes the second channel signal into a second downlink channel signal at the IF frequency.

7. The repeater system of claim 6, further comprising an input switch matrix, coupled between the uplink receive signal and the common IF unit, for coupling the uplink receive signal to a selected downconverter mixer.

8. The repeater system of claim 7, wherein the channel routing switch matrix routes the first channel signal into the first downlink channel signal and a third downlink channel signal substantially simultaneously.

9. The repeater system of claim 5, further comprising an input switch matrix, coupled between the uplink receive signal and the common IF unit, for coupling the uplink receive signal to a selected downconverter mixer.

10. The repeater system of claim 9, wherein the channel routing switch matrix routes the first channel signal into the first downlink channel signal and a third downlink channel signal substantially simultaneously.

11. A method for interconnecting communication channels and subchannels between an uplink receive signal and a downlink signal, comprising the steps of:

dividing the uplink receive signal into at least two uplink signals;

frequency shifting the uplink signal from a frequency of the uplink receive signal to an intermediate frequency (IF) signal having an IF frequency;

separating the IF signal into at least a first channel signal at the IF frequency;

frequency shifting the first channel signal at the IF frequency to a channel signal at a second frequency;

separating the uplink receive signal into at least one subchannel signal;

routing the subchannel from a selected uplink subchannel into at least one selected downlink subchannel;

recombining the selected downlink subchannels into a second channel signal;

routing the first channel signal into a first downlink channel signal and the second channel signal into a second downlink channel signal; and

combining the first and second downlink channel signals into a downlink signal.

12. The method of claim 11, wherein the communication channels are transmitted at radio frequencies.

13. The method of claim 11, wherein the step of separating separates multiple channel signals into multiple subchannel signals and the step of recombining recombines the multiple subchannel signals into selected multiple downlink channel signals.

14. The method of claim 13, wherein the downlink signal contains subchannel signals in more than one downlink channel.