Dual-system transmitting and receiving device

• US 20080008271A1
• Filed: 07/10/2007
• Published: 01/10/2008
• Est. Priority Date: 07/10/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Park, Sang Gyu, Yang, Chang Soo, Kim, Yu Sin, Lee, Kwang Du
• Application Number:
  US11/822,842
• Publication Number:
  US 20080008271A1
• Time in Patent Office: Days
• US Class Current: 375/340
• CPC Class Codes: H04B 1/0483 Transmitters with multiple parallel paths
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04L 27/001 using chaotic signals for secret or secure communication H04L9/001

Abstract

Provided is a dual-system transmitting device comprising a chaos signal generator that generates a chaos signal; a band-pass filter that filters the generated chaos signal into a signal within an information transmission bandwidth preset in a transmission side; an impulse signal generator that generates an impulse signal synchronized with a transmitted signal; a switching element that selectively outputs the chaos signal passing through the band-pass filter and the generated impulse signal; an amplifier that amplifies the signal selected by the switching element; and a signal transmitting unit that transmits the signal amplified by the amplifier through an antenna. When the signal amplified by the amplifier is a chaos signal, the signal transmitting unit modulates the amplified signal through an OOK (on-off keying) scheme such that the signal is transmitted as a carrier of a transmitted signal. When the signal amplified by the amplifier is an impulse signal, the signal transmitting unit passes the signal to transmit.

Provided is a dual-system receiving device, which is applied to both a received signal using a chaos signal as a carrier and a received signal using an impulse signal as a carrier, the dual-system receiving device comprising a band-pass filter that filters a received signal into a signal within an information transmission bandwidth preset in a reception side; an amplifier that amplifies the filtered received signal; a first demodulator that, when the amplified received signal is a received signal using a chaos signal as a carrier, demodulates the amplified received signal; a second demodulator that, when the amplified received signal is a received signal using an impulse signal as a carrier, demodulates the amplified received signal; and a switching element that selectively outputs the received signal amplified by the amplifier to the first or second demodulator.

Claims

1. A dual-system transmitting device comprising:

a chaos signal generator that generates a chaos signal;

a band-pass filter that filters the generated chaos signal into a signal within an information transmission bandwidth preset in a transmission side;

an impulse signal generator that generates an impulse signal synchronized with a transmitted signal;

a switching element that selectively outputs the chaos signal passing through the band-pass filter and the generated impulse signal;

an amplifier that amplifies the signal selected by the switching element; and

a signal transmitting unit that transmits the signal amplified by the amplifier through an antenna,

wherein when the signal amplified by the amplifier is a chaos signal, the signal transmitting unit modulates the amplified signal through an OOK (on-off keying) scheme such that the signal is transmitted as a carrier of a transmitted signal, and

when the signal amplified by the amplifier is an impulse signal, the signal transmitting unit passes the signal to transmit.

2. The dual-system transmitting device according to claim 1,

wherein the impulse signal generator includes a signal oscillating section that generates a square-wave signal with a constant period;

and an impulse signal converting section that converts the square-wave signal into an impulse signal synchronized with a transmitted signal.

3. A dual-system transmitting device comprising:

a chaos signal generator that generates a chaos signal;

a signal oscillator that generates a square-wave signal with a constant period;

a switching element that selectively outputs the generated chaos signal and the generated square-wave signal;

a modulator that modulates the signal selected by the switching element;

a band-pass filter that filters the signal modulated by the modulator into a signal within an information transmission bandwidth preset in a transmission side; and

an amplifier that amplifies the filtered signal to transmit,

wherein when the signal selected by the switching element is a chaos signal, the modulator modulates the chaos signal by using the chaos signal as a carrier signal of a transmitted signal, and

when the signal selected by the switching element is a square-wave signal, the modulator modulates the square-wave signal by converting the square-wave signal into an impulse signal synchronized with a transmitted signal.

4. The dual-system transmitting device according to claim 3,

wherein the modulator includes an impulse signal generating section that generates an impulse signal synchronized with a transmitted signal;

and a mixer section that mixes the chaos signal and a transmitted signal or mixes the square-wave signal and the impulse signal to perform modulating.

5. A dual-system receiving device which is applied to both a received signal using a chaos signal as a carrier and a received signal using an impulse signal as a carrier, the dual-system receiving device comprising:

a band-pass filter that filters a received signal into a signal within an information transmission bandwidth preset in a reception side;

an amplifier that amplifies the filtered received signal;

a first demodulator that, when the amplified received signal is a received signal using a chaos signal as a carrier, demodulates the amplified received signal;

a second demodulator that, when the amplified received signal is a received signal using an impulse signal as a carrier, demodulates the amplified received signal; and

a switching element that selectively outputs the received signal amplified by the amplifier to the first or second demodulator.

6. The dual-system receiving device according to claim 5,

wherein the first demodulator includes:

an envelope detecting section that detects the magnitude of the applied received signal through the envelope of the signal;

a filter section that eliminates noise included in the received signal output by the envelope detecting section;

a gain control section that controls a gain of the signal passing through the filter section such that the signal is included in a level range preset in the reception side; and

a first A/D conversion section that converts the signal, of which the gain is controlled by the gain control section, into a digital signal.

7. The dual-system receiving device according to claim 6,

wherein the filter section is constructed by a low pass filter.

8. The dual-system receiving device according to claim 5,

wherein the second demodulator includes:

an information detecting section that generates an impulse signal synchronized with the applied received signal and correlates the received signal with the generated impulse signal so as to detect an information signal included in the received signal;

an integrating section that integrates the detected signal such that the signal is included in a level range preset in the reception side; and

a second A/D conversion section that converts the integrated signal into a digital signal.

9. The dual-system receiving device according to claim 8,

wherein the information detecting section includes:

an impulse signal generator that generates an impulse signal synchronized with the received signal; and

a mixer that correlates the received signal with the impulse signal generated by the impulse signal generator so as to detect an information signal included in the received signal.