Method and apparatus for bit-rate enhancement and wireless communication using the same

Abstract

A method and an apparatus for bit-rate enhancement and a wireless communication system using the same are disclosed. According to the present invention, two approaches are provided for bit-rate enhancement: one is an increase of chip-rate and the other is a decrease of chip number associated with on symbol. As such, the transmission bit-rate can be enhanced significantly so as to facilitate the applications of wireless voice communications or security.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a mapping table of conventional symbol-to-chip at 2.4 GHz bandwidth;

FIG. 2 is a mapping table of conventional symbol-to-chip at 868/915 MHz bandwidth;

FIG. 3 is an exemplary diagram of half-sine pulse waveform;

FIG. 4 is a diagram to explain conventional sampling approach;

FIG. 5 schematically depicts a block diagram of a bit-rate enhancement apparatus in transmitter side in accordance with one preferred embodiment of the present invention;

FIG. 6 is a schematic diagram of comparing the half-sine waveforms according to the conventional approach and the present invention;

FIG. 7 schematically depicts a block diagram of a bit-rate enhancement apparatus in receiver side in accordance with one preferred embodiment of the present invention;

FIG. 8 is a schematic diagram of comparing the half-sine sampling according to the conventional approach and the present invention;

FIG. 9 schematically depicts a block diagram of a bit-rate enhancement apparatus in transmitter side in accordance with another preferred embodiment of the present invention;

FIG. 10 schematically depicts a block diagram of a bit-rate enhancement apparatus in receiver side in accordance with another preferred embodiment of the present invention;

FIG. 11 is a mapping table of symbol-to-chip at 2.4 GHz bandwidth in accordance with another preferred embodiment; and

FIG. 12 is a mapping table of symbol-to-chip at 868/915 MHz bandwidth in accordance with another preferred embodiment.

Claims

1. A method of bit-rate enhancement in the application of a wireless communication system, said method comprising the following steps of: converting bit data to symbol data;converting said symbol date to a plurality of chips, wherein each of said plurality of chips has a period less than 1 μsec; andmodulating said plurality of chips to a radio frequency signal for output.

2. The method as claimed in claim 1, further comprising a step of mixing said plurality of chips with a carrier to generate said radio frequency signal.

3. The method as claimed in claim 2, wherein said carrier has a frequency of 2.4 GHz.

4. The method as claimed in claim 3, wherein each of said plurality of chips has a half-sine waveform.

5. The method as claimed in claim 2, wherein said carrier has a frequency of 868/915 MHz.

6. The method as claimed in claim 5, wherein each of said plurality of chips has a raised-cosine waveform.

7. A method of bit-rate enhancement in the application of a wireless communication system, said method comprising the steps of: receiving a radio frequency signal;demodulating said radio frequency signal to a plurality of chips, wherein each of said plurality of chips has a period less than 1 μsec;converting said plurality of chips to symbol data; andconverting said symbol data to bit data.

8. The method as claimed in claim 7, wherein said radio frequency signal includes a carrier having a frequency of 2.4 GHz.

9. The method as claimed in claim 8, wherein each of said plurality of chips has a half-sine waveform.

10. The method as claimed in claim 7, wherein said radio frequency signal includes a carrier having a frequency of 868/915 MHz.

11. The method as claimed in claim 10, wherein each of said plurality of chips has a raised-cosine waveform.

12. A method of bit-rate enhancement in the application of a wireless communication system, said method comprising the following steps of: converting bit data to symbol data;converting said symbol data to N chips, wherein N is less than 32 at a first bandwidth and less than 15 at a second bandwidth; andmodulating said plurality of chips to a radio frequency signal.

13. The method as claimed in claim 12, further comprising a step of mixing said plurality of chips with a carrier to generate said radio frequency signal.

14. The method as claimed in claim 13, wherein said first bandwidth and said carrier have a frequency of 2.4 GHz.

15. The method as claimed in claim 14, wherein each of said N chips has a half-sine waveform.

16. The method as claimed in claim 13, wherein said second bandwidth and said carrier have a frequency of 868/915 MHz.

17. The method as claimed in claim 16, wherein each of said N chips has a raised-cosine waveform.

18. A method of bit-rate enhancement in the application of a wireless communication system, said method comprising the following steps of: receiving a radio frequency signal;demodulating said radio frequency signal to N chips, wherein N is less than 32 at a first bandwidth and less than 15 at a second bandwidth;converting said N chips to symbol data; andconverting said symbol data to bit data.

19. The method as claimed in claim 18, wherein said first bandwidth and a carrier of said radio frequency signal have a frequency of 2.4 GHz.

20. The method as claimed in claim 19, wherein each of said N chips has a half-sine waveform.

21. The method as claimed in claim 18, wherein said second bandwidth and a carrier of said radio frequency signal have a frequency of 868/915 MHz.

22. The method as claimed in claim 21, wherein each of said N chips has a raised-cosine waveform.

23. An apparatus of bit-rate enhancement in a wireless communication system, the apparatus comprising: means for converting bit data to symbol data;means for converting said symbol date to a plurality of chips, wherein each of said plurality of chips has a period less than 1 μsec; andmeans for modulating said plurality of chips to a radio frequency signal for output.

24. The apparatus as claimed in claim 23, further comprising means for mixing said plurality of chips with a carrier to generate said radio frequency signal.

25. The apparatus as claimed in claim 24, wherein said carrier has a frequency of 2.4 GHz.

26. The apparatus as claimed in claim 25, wherein each of said plurality of chips has a half-sine waveform.

27. The apparatus as claimed in claim 24, wherein said carrier has a frequency of 868/915 MHz.

28. The apparatus as claimed in claim 27, wherein each of said plurality of chips has a raised-cosine waveform.

29. An apparatus of bit-rate enhancement in a wireless communication system, the apparatus comprising: means for receiving a radio frequency signal;means for demodulating said radio frequency signal to a plurality of chips, wherein each of said plurality of chips has a period less than 1 μsec;means for converting said plurality of chips to symbol data; andmeans for converting said symbol data to bit data.

30. The apparatus as claimed in claim 29, wherein said radio frequency signal includes a carrier having a frequency of 2.4 GHz.

31. The apparatus as claimed in claim 30, wherein each of said plurality of chips has a half-sine waveform.

32. The apparatus as claimed in claim 29, wherein said radio frequency signal includes a carrier having a frequency of 868/915 MHz.

33. The apparatus as claimed in claim 32, wherein each of said plurality of chips has a raised-cosine waveform.

34. An apparatus of bit-rate enhancement in a wireless communication system, the apparatus comprising: means for converting bit data to symbol data;means for converting said symbol data to N chips, wherein N is less than 32 at a first bandwidth and less than 15 at a second bandwidth; andmeans for modulating said plurality of chips to a radio frequency signal.

35. The apparatus as claimed in claim 34, further comprising a step of mixing said plurality of chips with a carrier to generate said radio frequency signal.

36. The apparatus as claimed in claim 35, wherein said first bandwidth and said carrier have a frequency of 2.4 GHz.

37. The apparatus as claimed in claim 36, wherein each of said N chips has a half-sine waveform.

38. The apparatus as claimed in claim 35, wherein said second bandwidth and said carrier have a frequency of 868/915 MHz.

39. The apparatus as claimed in claim 38, wherein each of said N chips has a raised-cosine waveform.

40. An apparatus of bit-rate enhancement in a wireless communication system, the apparatus comprising: means for receiving a radio frequency signal;means for demodulating said radio frequency signal to N chips, wherein N is less than 32 at a first bandwidth and less than 15 at a second bandwidth;means for converting said N chips to symbol data; andmeans for converting said symbol data to bit data.

41. The apparatus as claimed in claim 40, wherein said first bandwidth and a carrier of said radio frequency signal have a frequency of 2.4 GHz.

42. The apparatus as claimed in claim 41, wherein each of said N chips has a half-sine waveform.

43. The apparatus as claimed in claim 40, wherein said second bandwidth and a carrier of said radio frequency signal have a frequency of 868/915 MHz.

44. The apparatus as claimed in claim 43, wherein each of said N chips has a raised-cosine waveform.

45. A wireless communication system of bit-rate enhancement, comprising: in a transmitter comprising: means for converting bit data to symbol data;means for converting said symbol date to a plurality of chips, wherein each of said plurality of chips has a period less than 1 μsec; andmeans for modulating said plurality of chips to a radio frequency signal for output;in a receiver comprising: means for receiving said radio frequency signal;means for demodulating said radio frequency signal to a plurality of received chips, wherein each of said plurality of received chips has a period less than 1 μsec;means for converting said plurality of received chips to received symbol data; andmeans for converting said received symbol data to received bit data.

46. The apparatus as claimed in claim 45, further comprising means for mixing said plurality of chips with a carrier to generate said radio frequency signal.

47. The apparatus as claimed in claim 46, wherein said carrier has a frequency of 2.4 GHz.

48. The apparatus as claimed in claim 47, wherein each of said plurality of chips has a half-sine waveform.

49. The apparatus as claimed in claim 46, wherein said carrier has a frequency of 868/915 MHz.

50. The apparatus as claimed in claim 49, wherein each of said plurality of chips has a raised-cosine waveform.

51. A wireless communication system of bit-rate enhancement, comprising: in a transmitter, comprising: means for converting bit data to symbol data;means for converting said symbol data to N chips, wherein N is less than 32 at a first bandwidth and less than 15 at a second bandwidth; andmeans for modulating said plurality of chips to a radio frequency signal;in a receiver, comprising: means for receiving said radio frequency signal;means for demodulating said radio frequency signal to N received chips, wherein N is less than 32 at a first bandwidth and less than 15 at a second bandwidth;means for converting said N received chips to received symbol data; andmeans for converting said received symbol data to received bit data.

52. The system as claimed in claim 51, further comprising means for mixing said N chips with a carrier to generate said radio frequency signal.

53. The apparatus as claimed in claim 52, wherein said first bandwidth and said carrier have a frequency of 2.4 GHz.

54. The apparatus as claimed in claim 53, wherein each of said N chips has a half-sine waveform.

55. The apparatus as claimed in claim 52, wherein said second bandwidth and said carrier have a frequency of 868/915 MHz.

56. The apparatus as claimed in claim 55, wherein each of said N chips has a raised-cosine waveform.