Wireless transmission system, wireless communication device, and wireless communication method

• US 8,831,073 B2
• Filed: 08/05/2010
• Issued: 09/09/2014
• Est. Priority Date: 08/31/2009
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kawasaki, Kenichi
• Primary Examiner(s): Bayard, Emmanuel
• Application Number:
  US12/805,552
• Publication Number:
  US 20110051780A1
• Time in Patent Office: 1,496 Days
• Field of Search: 375219-222, 375354-359
• US Class Current: 375/219
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04L 27/04 Modulator circuits; Transmitter circuits
• CPC Class Codes: H04L 27/122 using digital generation of carrier signals digital function generators G06F1/02, H04L17/10; generating pulses having stepped portions using digital techniques H03K4/026
• CPC Class Codes: H04L 27/20 Modulator circuits; Transmitter circuits
• CPC Class Codes: H04L 27/365 Modulation using digital generation of the modulated carrier (not including modulation of a digitally generated carrier)

Abstract

A wireless transmission system includes: a communication unit for transmission; and a communication unit for reception. The communication units for transmission and reception are housed in a housing of the same electronic apparatus, or the communication unit for transmission is housed in a housing of first electronic apparatus and the communication unit for reception is housed in a housing of second electronic apparatus and a wireless signal transmission path enabling wireless information transmission between the communication units is formed between the communication units when the first and the second electronic apparatus are disposed at given positions to be integrated with each other. The communication unit for transmission includes a first carrier signal generating unit and a first frequency converter, and the communication unit for reception includes a second carrier signal generating unit, and a second frequency converter.

Claims

1. A wireless transmission system comprising:

a transmission-side frequency converter configured to convert a subject signal into a modulated signal, said transmission-subject signal modulated with a modulation carrier signal becoming said modulated signal;

a transmission-side antenna configured to radiate an amplified signal, said modulated signal after amplification becoming said amplified signal;

a reception-side antenna configured to receive said amplified signal from the transmission-side antenna, said amplified signal after reception by the reception-side antenna becoming a received modulated signal;

a reception-side demodulation functional unit configured to output a synchronous detection signal, said received modulated signal mixed with an oscillator signal becoming said synchronous detection signal;

a reception-side injection locking controller configured to generate an injection signal from said synchronous detection signal, said injection signal controlling said reception-side demodulation functional unit to synchronize said oscillator signal with said modulation carrier signal,

wherein said transmission-side frequency converter and said transmission-side antenna are within a housing of a first electronic apparatus.

2. A wireless transmission system comprising:

a reception-side demodulation functional unit configured to mix a received modulated signal with an oscillator signal, said received modulated signal mixed with said oscillator signal becoming a synchronous detection signal;

a reception-side injection locking controller configured to convert said synchronous detection signal into an injection signal, said injection signal controlling said reception-side demodulation functional unit to synchronize said oscillator signal with a modulation carrier signal.

3. The wireless transmission system according to claim 2, wherein said oscillator signal is a repetitive waveform, said modulation carrier signal being another repetitive waveform.

4. The wireless transmission system according to claim 2, further comprising:

a direct-current component suppressor configured to remove a direct-current component from said synchronous detection signal, said synchronous detection signal without the direct-current component being output to said reception-side injection locking controller.

5. The wireless transmission system according to claim 2, further comprising:

a reception-side phase adjuster within said reception-side demodulation functional unit, said reception-side phase adjuster being configured to cancel a phase difference between said injection signal and said oscillator signal.

6. The wireless transmission system according to claim 5, wherein said phase difference is a difference in phase between a modulation axis on which the subject signal is carried and an axis on which said reference carrier signal is carried.

7. The wireless transmission system according to claim 2, further comprising:

a transmission-side modulation functional unit configured to modulate a subject signal modulated with said modulation carrier signal, said subject signal modulated with said modulation carrier signal becoming a modulated signal.

8. The wireless transmission system according to claim 7, further comprising:

a reception-side filter processor configured to remove said subject signal from said synchronous detection signal.

9. The wireless transmission system according to claim 7, further comprising:

a transmission-side antenna configured to radiate an amplified signal, said modulated signal after amplification becoming said amplified signal.

10. The wireless transmission system according to claim 9, further comprising:

a reception-side antenna configured to output said received modulated signal, said amplified signal wirelessly received by said reception-side antenna becoming said received modulated signal.

11. The wireless transmission system according to claim 7, wherein said transmission-side modulation functional unit is controllable to synchronize said modulation carrier signal with said oscillator signal.

12. The wireless transmission system according to claim 7, wherein said reception-side injection locking controller is configured to output a reference carrier signal, said reference carrier signal controlling said transmission-side modulation functional unit to synchronize said oscillator signal with said modulation carrier signal.

13. The wireless transmission system according to claim 7, wherein said reception-side injection locking controller is configured to output a reference carrier signal, said reference carrier signal controlling said transmission-side modulation functional unit to synchronize said modulation carrier signal with said oscillator signal.

14. The wireless transmission system according to claim 7, further comprising:

a transmission-side local oscillator within said transmission-side modulation functional unit, said transmission-side local oscillator being configured to generate said modulation carrier signal.

15. The wireless transmission system according to claim 14, further comprising:

a reception-side local oscillator within said reception-side demodulation functional unit, said reception-side local oscillator being configured to generate said oscillator signal.

16. The wireless transmission system according to claim 7, further comprising:

a housing of a first electronic apparatus, said transmission-side modulation functional unit and said transmission-side antenna being enclosed within said housing of the first electronic apparatus.

17. The wireless transmission system according to claim 16, wherein said reception-side injection locking controller is enclosed within said housing of the first electronic apparatus.

18. The wireless transmission system according to claim 16, wherein said reception-side antenna and said reception-side demodulation functional unit being enclosed within said housing of the first electronic apparatus.

19. The wireless transmission system according to claim 16, further comprising:

a housing of a second electronic apparatus, said reception-side antenna and said reception-side demodulation functional unit being enclosed within said housing of the second electronic apparatus.

20. The wireless transmission system according to claim 19, wherein said reception-side injection locking controller is enclosed within said housing of the second electronic apparatus.