Alternate Radio Transmitter and Method for Operating the Same

• US 20120092216A1
• Filed: 12/04/2010
• Published: 04/19/2012
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: National Chung-Shan Institute of Science and Technology
• Original Assignee: Chung-Shan Institute of Science & Technology Armaments Bureau MND (Government of The Republic of China)
• Inventors: Chang, Yu-Cheng, Lin, Yu-San, Chang, Feng-Yu
• Granted Patent: US 8,421,671 B2
• Time in Patent Office: Days
• US Class Current: 342/357.75
• CPC Class Codes: G01S 19/17 Emergency applications
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• CPC Class Codes: H04B 1/02 Transmitters
• CPC Class Codes: H04B 1/3805 with built-in auxiliary receivers

Abstract

An alternate radio transmitter includes a processor, a modulator, a PLL unit and a radio transmission unit. The processor provides a digital signal. The modulator modulates the digital signal, thus providing at least two modulated signals. The PLL unit mixes the modulated signals, thus providing an output signal. The radio transmission unit transmits the output signal.

Claims

1. An alternate radio transmitter including:

a processor 110 for providing a digital signal;

a modulator 120 for modulating the digital signal, thus providing at least two modulated signals;

a PLL unit 130 for mixing the modulated signals, thus providing an output signal; and

a radio transmission unit for transmitting the output signal.

2. The alternate radio transmitter according to claim 1, including a GPS receiver 100 for receiving GPS data and sending the GPS data to the processor 110.

3. The alternate radio transmitter according to claim 1, wherein the modulated signals include an AM signal.

4. The alternate radio transmitter according to claim 1, wherein the modulated signals include a FSK signal.

5. The alternate radio transmitter according to claim 1, wherein the modulated signals include an AM signal and a FSK signal.

6. The alternate radio transmitter according to claim 5, wherein the AM signal is mixed with the FSK signal at a time ratio of 2:

1.

7. The alternate radio transmitter according to claim 4, wherein the FSK signal includes the GPS data.

14. A method for executing a rescue mission including the steps of:

using the alternate radio transmitter according to claim 1 to send an output signal for help, wherein the output signal includes an AM signal and a FSK signal including GPS data;

using an AM receiver to receive the AM signal to determine a direction for the rescue mission; and

using an FSK receiver to receive the FSK signal to determine a precise location for the rescue mission.

8. A method for operating an alternate radio transmitter including the steps of:

providing a GPS receiver 100 for receiving GPS data;

providing a processor 110 for receiving the GPS data and providing a digital signal including the GPS data;

providing a modulator 120 for modulating the digital signal, thus providing at least two modulated signals;

providing a PLL unit 130 for mixing the modulated signals, thus providing an output signal; and

providing a radio transmission unit for transmitting the output signal.

9. The method according to claim 8, wherein the modulated signals include an AM signal.

10. The method according to claim 8, wherein the modulated signals include a FSK signal.

11. The method according to claim 8, wherein the modulated signals include an AM signal and a FSK signal.

12. The method according to claim 11, wherein the AM signal is mixed with the FSK signal at a time ratio of 2:

1.

13. The method according to claim 10, wherein the FSK signal includes the GPS data.