Self-powered positioning and modem system for two-way radio

• US 7,881,728 B2
• Filed: 06/24/2005
• Issued: 02/01/2011
• Est. Priority Date: 06/25/2004
• Status: Expired due to Fees

• Current Assignee: Henry Liou
• Original Assignee: Henry Liou
• Inventors: Liou, Henry
• Primary Examiner(s): Eng; George
• Assistant Examiner(s): FARAGALLA, MICHAEL A
• Application Number:
  US11/165,653
• Publication Number:
  US 20050288039A1
• Time in Patent Office: 2,048 Days
• Field of Search: 455/404.1, 455/404.2, 455/457, 455/456.1, 455/456.2, 455/456.6, 342/357.1
• US Class Current: 455/456.1
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• CPC Class Codes: H04M 1/72409 by interfacing with external accessories hands-free H04M1/60
• CPC Class Codes: H04M 2250/10 including a GPS signal receiver

Abstract

A self-powered positioning and modem system, which is adapted for linking to a radio frequency transmitter of a communication device to communicating with a communication system through radio frequency signals, includes a GPS controller for communicatively linking to the radio frequency transmitter. The GPS controller includes a position information receptor receiving a positioning data, a signal converter linked to the position information receptor to encode the positioning data into a RF positioning signal in form of audio signal, wherein the GPS controller is triggered for wirelessly transmitting the RF positioning signal through the radio frequency transmitter to the communication system.

Claims

1. A self-powered positioning and modem system for an existing two-way radio which comprises a speaker-microphone set having an Push-to-Talk (PTT) activation circuit controlling an audio signal to be wirelessly sent and received by a radio frequency transmitter between a transmit mode and a receive mode, wherein said self-powered positioning and modem system comprises:

a GPS controller for externally and directly connecting to speaker-microphone set in such a manner that said GPS controller is triggered to wirelessly transmit said positioning signal when said activation circuit of said speaker-microphone set is activated, wherein said GPS controller comprises;

a position information receptor arranged to receive positioning signal, wherein said GPS controller is triggered for wirelessly transmitting said positioning signal through said radio frequency transmitter;

a signal converter linked to said position information receptor to encode said positioning signal into a RF positioning signal, such that said positioning signal is encoded and transmitted as said RF positioning signal in a wireless manner through said radio frequency transmitter; and

a baseband signal processor arranged to mix said positioning signal with a RF audio signal of said speaker-microphone set for wirelessly transmitting said positioning signal through said radio frequency transmitter, wherein said self-powered positioning and modem system is adapted to transmit said positioning information by receiving said positioning signal through said GPS controller, and then wirelessly transmitting said positioning signal through said radio frequency transmitter when said activation circuit of said speaker-microphone set is activated, in such a manner that said positioning signal is mixed with said audio signal for wirelessly transmitting said positioning signal through said radio frequency transmitter, and that said positioning signal is encoded into a corresponding RF positioning signal, wherein said GPS controller is periodically self-triggered to wirelessly transmit said positioning signal without said audio signal.

2. The system, as recited in claim 1, further comprising a portable case receiving said GPS controller therein, wherein said portable case is adapted for externally connecting between said speaker-microphone set and said radio frequency transmitter to communicatively link said GPS controller between said speaker-microphone set and said radio frequency transmitter.