Signal transmission system, transmitting device, receiving device, electronic device, and signal transmisission method

• US 20110194627A1
• Filed: 01/19/2011
• Published: 08/11/2011
• Est. Priority Date: 02/10/2010
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Shinke, Satoru, Fukuda, Satoshi, Kawasaki, Kenichi
• Granted Patent: US 8,824,529 B2
• Time in Patent Office: Days
• US Class Current: 375/259
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: Y10S 505/825 Apparatus per se, device per se, or process of making or operating same
• CPC Class Codes: Y10S 505/866 Wave transmission line, network, waveguide, or microwave storage device

Abstract

A signal transmission system includes: a transmitting section including a first carrier signal generating section configured to generate a carrier signal for modulation and a first frequency converting section configured to generate a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation, the carrier signal for modulation being generated by the first carrier signal generating section; and a receiving section including a second carrier signal generating section configured to generate a carrier signal for demodulation and a second frequency converting section configured to frequency-convert the transmission signal received by the carrier signal for demodulation, the carrier signal for demodulation being generated by the second carrier signal generating section.

Claims

1. A signal transmission system comprising:

a transmitting section including a first carrier signal generating section configured to generate a carrier signal for modulation and a first frequency converting section configured to generate a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation, the carrier signal for modulation being generated by said first carrier signal generating section; and

a receiving section including a second carrier signal generating section configured to generate a carrier signal for demodulation and a second frequency converting section configured to frequency-convert the transmission signal received by the carrier signal for demodulation, the carrier signal for demodulation being generated by said second carrier signal generating section;

wherein at least one of said carrier signal for modulation and said carrier signal for demodulation is set so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.

2. The signal transmission system according to claim 1,

wherein only one of a center of a band of said transmitting section and a center of a band of said receiving section is set so as to be shifted with respect to frequency of said carrier signal.

3. The signal transmission system according to claim 1,

wherein both of a center of a band of said transmitting section and a center of a band of said receiving section is set so as to be shifted in a same direction with respect to frequency of said carrier signal.

4. The signal transmission system according to claim 1,

wherein said second frequency converting section demodulates said transmission object signal by performing said frequency conversion by a synchronous detection system.

5. The signal transmission system according to claim 1,

wherein said second carrier signal generating section generates the carrier signal for demodulation, the carrier signal for demodulation being synchronized with the carrier signal for modulation, the carrier signal for modulation being generated by said first carrier signal generating section, by an injection locking system based on the received signal.

6. The signal transmission system according to claim 1,

wherein said transmitting section has a modulation object signal processing section configured to suppress a component in a vicinity of a direct current of said transmission object signal to be modulated, and

said first frequency converting section generates said transmission signal by frequency-converting a processed signal processed by said modulation object signal processing section by the carrier signal for modulation, the carrier signal for modulation being generated by said first carrier signal generating section.

7. The signal transmission system according to claim 6,

wherein said modulation object signal processing section subjects said transmission object signal in a digital form to direct current-free coding.

8. The signal transmission system according to claims 1,

wherein said receiving section includes an injection locking detecting section configured to detect information indicating a state of injection locking in said second carrier signal generating section, and

at least one of said transmitting section and said receiving section includes an injection locking adjusting section configured to make synchronization adjustment so that said carrier signal for demodulation, said carrier signal for demodulation being generated by said second carrier signal generating section, is synchronized with said carrier signal for modulation, said carrier signal for modulation being generated by said first carrier signal generating section, on a basis of the information indicating said state of injection locking, the information being detected by said injection locking detecting section.

9. The signal transmission system according to claim 1,

wherein said transmitting section and said receiving section are housed within a casing of an identical electronic device, and a radio signal transmission line for allowing information transmission by radio between said transmitting section and said receiving section is formed within said casing.

10. The signal transmission system according to claim 1,

wherein said transmitting section is housed within a casing of a first electronic device, said receiving section is housed within a casing of a second electronic device, and a radio signal transmission line for allowing information transmission by radio between said transmitting section and said receiving section is formed between said transmitting section within said first electronic device and said receiving section within said second electronic device when said first electronic device and said second electronic device are disposed at determined positions and are integral with each other.

11. The signal transmission system according to claim 9,

wherein said radio signal transmission line has a structure for transmitting a radio signal while confining the radio signal in the transmission line.

12. The signal transmission system according to claim 1,

wherein frequency of said carrier signal is set in one of a millimeter wave band and a submillimeter wave band.

13. A transmitting device comprising:

a carrier signal generating section configured to generate a carrier signal for modulation; and

a frequency converting section configured to generate a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation, the carrier signal for modulation being generated by said carrier signal generating section;

wherein said carrier signal generating section sets frequency of said carrier signal so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.

14. A receiving device comprising:

a carrier signal generating section configured to generate a carrier signal for demodulation; and

a frequency converting section configured to frequency-convert a received transmission signal by the carrier signal for demodulation, the carrier signal for demodulation being generated by said carrier signal generating section;

wherein said carrier signal generating section sets frequency of said carrier signal so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.

15. An electronic device comprising:

a transmitting section including a first carrier signal generating section configured to generate a carrier signal for modulation and a first frequency converting section configured to generate a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation, the carrier signal for modulation being generated by said first carrier signal generating section; and

/or

a receiving section including a second carrier signal generating section configured to generate a carrier signal for demodulation and a second frequency converting section configured to frequency-convert the transmission signal received by the carrier signal for demodulation, the carrier signal for demodulation being generated by said second carrier signal generating section;

wherein at least one of said carrier signal for modulation and said carrier signal for demodulation is set so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.

16. A signal transmission method comprising the step of:

in generating a carrier signal for modulation and generating a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation in a transmitting section, and

in generating a carrier signal for demodulation and demodulating said transmission object signal by frequency-converting received said transmission signal by said carrier signal for demodulation in a receiving section,

setting at least one of said carrier signal for modulation and said carrier signal for demodulation so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.

17. A transmitting device comprising:

carrier signal generating means for generating a carrier signal for modulation; and

frequency converting means for generating a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation, the carrier signal for modulation being generated by said carrier signal generating means;

wherein said carrier signal generating means sets frequency of said carrier signal so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.

18. A receiving device comprising:

carrier signal generating means for generating a carrier signal for demodulation; and

frequency converting means for frequency-converting a received transmission signal by the carrier signal for demodulation, the carrier signal for demodulation being generated by said carrier signal generating means;

wherein said carrier signal generating means sets frequency of said carrier signal so as to be shifted with respect to a center of a band of a transmission characteristic between transmission and reception.