Multichannel signal transmission and reception for bluetooth systems

• US 20020150147A1
• Filed: 03/03/2001
• Published: 10/17/2002
• Est. Priority Date: 03/03/2001
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Oxford Semiconductor, Inc. (Broadcom, Inc.)
• Inventors: Liang, Ping
• Granted Patent: US 7,145,934 B2
• Time in Patent Office: Days
• US Class Current: 375/133
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04B 2001/7154 with means for preventing interference
• CPC Class Codes: H04L 27/28 with simultaneous transmission of different frequencies each representing one code element

Abstract

One embodiment of the present invention includes a circuit and a transmitter. The circuit generates a first signal at a first frequency and a second signal at a second frequency. The first frequency is provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding. The transmitter transmits the first and second signals in a radio frequency (RF) band simultaneously within a transmission period. Another embodiment of the invention includes a receiver and a circuit. The receiver receives simultaneously a first signal at a first frequency and a second signal at a second frequency in a radio frequency (RF) band. The first frequency is provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding. The circuit demodulates the first and second signals into first and second data streams, respectively.

Claims

1. An apparatus comprising:

a circuit to generate a first signal at a first frequency and a second signal at a second frequency, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding; and

a transmitter coupled to the circuit to transmit the first and second signals in a radio frequency (RF) band simultaneously within a transmission period.

2. The apparatus of claim 1 wherein the second frequency is provided by a second frequency-hopping sequence, the first and second frequency-hopping sequences being non-colliding.

3. The apparatus of claim 1 wherein the first and second frequencies are different by a fixed frequency interval.

4. The apparatus of claim 1 wherein the circuit comprises:

a shift register to serially shift a first data stream representing the first signal; and

a look-up table (LUT) circuit coupled to the shift register to generate a second data stream representing the second signal.

5. The apparatus of claim 4 wherein the LUT circuit comprises:

a mapper to generate mapping information;

a curve selection decoder to generate curve selection; and

a sine and cosine generator coupled to the mapper and the curve selection decoder to generate the second data stream based on the mapping information and the curve selection.

6. The apparatus of claim 1 wherein the RF band is one of a 2.4 GHz industrial scientific medicine (ISM) band and a bluetooth compatible frequency band.

15. The apparatus of claim 11 wherein the second frequency is provided by a second frequency hopping sequence.

7. An apparatus comprising:

a receiver to receive simultaneously a first signal at a first frequency and a second signal at a second frequency in a radio frequency (RF) band, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding; and

a circuit coupled to the receiver to demodulate the first and second signals into first and second data streams, respectively.

8. The apparatus of claim 7 wherein the second frequency is provided by a second frequency-hopping sequence, the first and second frequency-hopping sequences being non-colliding.

9. The apparatus of claim 7 wherein the first and second frequencies are different by a fixed frequency interval.

10. The apparatus of claim 7 wherein the RF band is one of a 2.4 GHz industrial scientific medicine (ISM) band and a bluetooth compatible frequency band.

11. An apparatus comprising:

first and second circuits to generate first and second signals at first and second frequencies, respectively, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding; and

first and second transmitters coupled to the first and second circuits to transmit the first and second signals in a radio frequency (RF) band simultaneously within a transmission period.

12. The apparatus of claim 11 wherein the second frequency is within a fixed frequency range.

13. The apparatus of claim 12 wherein the first signal skips the fixed frequency range in the first frequency-hopping sequence.

14. The apparatus of claim 12 wherein the second signal is temporarily disabled when the first signal hops into the fixed frequency range.

16. The apparatus of claim 15 wherein the second frequency hopping sequence is a function of the first frequency hopping sequence.

17. The apparatus of claim 11 wherein the first and second frequency-hopping sequences are separated by a fixed frequency interval.

18. The apparatus of claim 11 wherein the first and second circuits are combined into a single circuit.

19. The apparatus of claim 11 wherein the first and second transmitters are combined into a single circuit.

20. An apparatus comprising:

first and second receivers to receive simultaneously first and second signals at first and second frequencies, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding; and

first and second circuits coupled to first and second receivers to demodulate the first and second signals into first and second data streams.

21. The apparatus of claim 20 wherein the second frequency is within a fixed frequency range.

22. The apparatus of claim 21 wherein the first signal skips the fixed frequency range in the first frequency-hopping sequence.

23. The apparatus of claim 21 wherein the second signal is temporarily disabled when the first signal hops into the fixed frequency range.

24. The apparatus of claim 20 wherein the second frequency is provided by a second frequency hopping sequence.

25. The apparatus of claim 24 wherein the second frequency hopping sequence is a function of the first frequency hopping sequence.

26. The apparatus of claim 20 wherein the first and second frequency-hopping sequence are separated by a fixed frequency interval.

27. The apparatus of claim 20 wherein the first and second circuits are combined into a single circuit.

28. The apparatus of claim 20 wherein the first and second receivers are combined into a single circuit.

30. The method of claim 29 wherein the second frequency is provided by a second frequency-hopping sequence, the first and second frequency-hopping sequences being non-colliding.

31. The method of claim 29 wherein the first and second frequencies are different by a fixed frequency interval.

32. The method of claim 29 wherein generating comprises:

serially shifting a first data stream representing the first signal; and

generating a second data stream representing the second signal by a look-up table (LUT) circuit.

33. The method of claim 32 wherein generating the second data stream comprises:

generating mapping information;

generating curve selection; and

generating the second data stream from a sine and cosine generator based on the mapping information and the curve selection.

34. The method of claim 29 wherein the RF band is one of a 2.4 GHz industrial scientific medicine (ISM) band and a bluetooth compatible frequency band.

36. The method of claim 35 wherein the second frequency is provided by a second frequency-hopping sequence, the first and second frequency-hopping sequences being non-colliding.

37. The method of claim 35 wherein the first and second frequencies are different by a fixed frequency interval.

38. The method of claim 35 wherein the RF band is one of a 2.4 GHz industrial scientific medicine (ISM) band and a bluetooth compatible frequency band.

39. The method of claim 35 wherein the second frequency is within a fixed frequency range.

40. The method of claim 39 wherein the first signal skips the fixed frequency range in the first frequency-hopping sequence.

41. The method of claim 39 further comprising:

temporarily disabling the second signal when the first signal hops into the fixed frequency range.

29. A method comprising:

generating a first signal at a first frequency and a second signal at a second frequency, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding; and

transmitting the first and second signals in a radio frequency (RF) band simultaneously within a transmission period.

35. An method comprising:

receiving simultaneously a first signal at a first frequency and a second signal at a second frequency in a radio frequency (RF) band, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding; and

demodulating the first and second signals into first and second data streams, respectively.

42. A system comprising:

a link manager to manage wireless connections between at least a mobile device and a processing unit;

a link controller coupled to the link manager to control the wireless connections; and

a radio unit coupled to the link controller to process radio frequency (RF) signals for the wireless connections, the radio unit comprising;

a circuit to generate a first signal at a first frequency and a second signal at a second frequency, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding, and

a transmitter coupled to the circuit to transmit the first and second signals in an RF band simultaneously within a transmission period.

43. The system of claim 42 wherein the second frequency is provided by a second frequency-hopping sequence, the first and second frequency-hopping sequences being non-colliding.

44. The system of claim 42 wherein the first and second frequencies are different by a fixed frequency interval.

45. The system of claim 42 wherein the RF band is one of a 2.4 GHz industrial scientific medicine (ISM) band and a bluetooth compatible frequency band.

47. The system of claim 46 wherein the second frequency is provided by a second frequency-hopping sequence, the first and second frequency-hopping sequences being non-colliding.

48. The system of claim 46 wherein the first and second frequencies are different by a fixed frequency interval.

49. The system of claim 46 wherein the RF band is one of a 2.4 GHz industrial scientific medicine (ISM) band and a bluetooth compatible frequency band.

46. A system comprising:

a link manager to manage wireless connections between at least a mobile device and a processing unit;

a link controller coupled to the link manager to control the wireless connections; and

a radio unit coupled to the link controller to process radio frequency (RF) signals for the wireless connections, the radio unit comprising;

a receiver to receive simultaneously a first signal at a first frequency and a second signal at a second frequency in a radio frequency (RF) band, the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding, and a circuit coupled to the receiver to demodulate the first and second signals into first and second data streams, respectively.

50. An apparatus comprising:

a circuit to transmit first and second signals at first and second frequencies, the first frequency being provided by a first frequency-hopping sequence; and

a controller coupled to the circuit to co-ordinate transmission of the first and second signals such that the first and second frequencies are non-colliding.

51. An apparatus comprising:

a first transmitting circuit to generate a first signal at a first frequency, the first signal being received by a second receiving circuit; and

a first receiving circuit to receive a second signal at a second frequency simultaneously with the first transmitting circuit, the second signal being transmitted by a second transmitting circuit;

wherein the first frequency being provided by a first frequency-hopping sequence such that the first and second frequencies are non-colliding.