Adaptive radio transceiver with a local oscillator

• US 7,720,444 B2
• Filed: 01/26/2006
• Issued: 05/18/2010
• Est. Priority Date: 10/21/1999
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Darabi, Hooman, Rofougaran, Ahmadreza, Rofougaran, Maryam
• Primary Examiner(s): PHAM, TUAN
• Application Number:
  US11/340,038
• Publication Number:
  US 20060205374A1
• Time in Patent Office: 1,573 Days
• Field of Search: 455/75, 455/76, 455/183.1, 455/209, 455/208, 455/315, 455/236.1, 455/265, 455/255
• US Class Current: 455/73
• CPC Class Codes: H03B 21/01 by beating unmodulated signals of different frequencies
• CPC Class Codes: H03B 27/00 Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
• CPC Class Codes: H03H 11/1291 Current or voltage controlled filters
• CPC Class Codes: H03H 2011/0494 Complex filters
• CPC Class Codes: H03H 21/0001 Analogue adaptive filters
• CPC Class Codes: H03H 21/0012 Digital adaptive filters
• CPC Class Codes: H03J 2200/10 Tuning of a resonator by means of digitally controlled capacitor bank
• CPC Class Codes: H04B 1/30 for homodyne or synchrodyne receivers demodulator circuits H03D1/22
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 17/104 of other parameters, e.g. DC offset, delay or propagation times
• CPC Class Codes: H04B 17/14 of the whole transmission and reception path, e.g. self-test loop-back
• CPC Class Codes: H04B 17/19 Self-testing arrangements

Abstract

An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.

Claims

1. A wireless communications device, comprising:

a local oscillator comprising;

a first oscillator configured to generate a first signal having a first frequency,

a frequency divider configured to generate a second signal from the first signal, the second signal having a second frequency, and

a first mixer configured to mix the first signal and the second signal to produce a third signal having a third frequency;

a transmitter having a second mixer configured to mix the third signal and a fourth signal; and

a receiver having a third mixer configured to mix the third signal and a fifth signal with a first control signal applied to the programmable divisor input,

wherein the first oscillator comprises a voltage controlled oscillator,

wherein the local oscillator comprises a phase locked loop configured to control the first frequency of the first signal generated by the voltage controlled oscillator,

wherein the local oscillator comprises a second oscillator and a second frequency divider,

wherein the second frequency divider is operatively coupled to the second oscillator,

wherein the voltage controlled oscillator is phase locked to an output of the second frequency divider,

wherein the second frequency divider comprises a programmable divisor input,

wherein the third signal and the fourth signal are mixed by the second mixer with a second control signal applied to the programmable divisor input, and

wherein the second control signal is different from the first control signal.

2. The wireless communications device according to claim 1, wherein the first oscillator, the frequency divider, the first mixer and the second mixer are each quadrature.

3. The wireless communications device according to claim 1, wherein the third frequency comprises a sum of the first frequency and the second frequency.

4. The wireless communications device according to claim 1, wherein the fourth signal comprises a baseband signal.

5. The wireless communications device according to claim 1, wherein the frequency divider is programmable.

6. The wireless communications device according to claim 1, wherein the wireless communications device performs orthogonal frequency division multiplexing.

7. The wireless communications device according to claim 1, wherein the wireless communications device performs spread spectrum modulation.

8. The wireless communications device according to claim 1, wherein the wireless communications device performs frequency hopping.

9. The wireless communications device according to claim 1, wherein the wireless communications device performs direct sequence spread spectrum modulation.

10. The wireless communications device according to claim 1, wherein the local oscillator and the transmitter are integrated on a single integrated circuit chip.

11. The wireless communications device according to claim 1, wherein the local oscillator or the transmitter is integrated on an integrated circuit chip.

12. The wireless communications device according to claim 1, wherein the local oscillator employs CMOS technology.

13. The wireless communications device according to claim 1, wherein the transmitter employs CMOS technology.

14. The wireless communications device according to claim 1, wherein the transmitter and the local oscillator employ CMOS technology.

15. The wireless communications device according to claim 1, wherein the wireless communications device can be programmed to support a plurality of different wireless spread spectrum modulation techniques.

16. The wireless communications device according to claim 1, wherein the wireless communications device supports a plurality of different wireless spread spectrum modulation techniques.

17. The wireless communications device according to claim 1, wherein the wireless communications device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using spread spectrum modulation.

18. The wireless communications device according to claim 1, wherein the wireless communications device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using direct sequence spread spectrum modulation.

19. The wireless communications device according to claim 1, wherein the wireless communications device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using frequency hopping.

20. The wireless communications device according to claim 1, wherein the wireless communications device supports wireless communications using orthogonal frequency division multiplexing, wireless communications using frequency hopping and wireless communications using direct sequence spread spectrum modulation.

21. A wireless spread spectrum communications device, comprising:

a local oscillator comprising;

a quadrature oscillator that generates a first signal having a first frequency,

a quadrature frequency divider that generates a second signal from the first signal, the second signal having a second frequency, and

a first quadrature mixer that mixes the first signal and the second signal and produces a third signal having a third frequency; and

a transmitter having a second quadrature mixer, the second quadrature mixer mixing the third signal with a fourth signal.

22. The device according to claim 21, comprising:

a receiver having a third mixer configured to mix the third signal and a fifth signal with a first control signal applied to the programmable divisor input,

wherein the third signal and the fourth signal are mixed by the second mixer with a second control signal applied to the programmable divisor input, and

wherein the second control signal is different from the first control signal.

24. The device according to claim 21, wherein the device performs orthogonal frequency division multiplexing.

25. The device according to claim 21, wherein the device performs frequency hopping.

26. The device according to claim 21, wherein the device performs direct sequence spread spectrum modulation.

27. The device according to claim 21, wherein the local oscillator and the transmitter are integrated on a single integrated circuit chip.

28. The device according to claim 21, wherein the local oscillator or the transmitter is integrated on an integrated circuit chip.

29. The device according to claim 21, wherein the local oscillator employs CMOS technology.

30. The device according to claim 21, wherein the transmitter employs CMOS technology.

31. The device according to claim 21, wherein the transmitter and the local oscillator employ CMOS technology.

32. The device according to claim 21, wherein the device can be programmed to support a plurality of different wireless spread spectrum modulation techniques.

33. The device according to claim 21, wherein the device supports a plurality of different wireless spread spectrum modulation techniques.

34. The device according to claim 21, wherein the device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using spread spectrum modulation.

35. The device according to claim 21, wherein the device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using direct sequence spread spectrum modulation.

36. The device according to claim 21, wherein the device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using frequency hopping.

37. The device according to claim 21, wherein the device supports wireless communications using orthogonal frequency division multiplexing, wireless communications using frequency hopping and wireless communications using direct sequence spread spectrum modulation.

23. A wireless communications device, comprising:

a local oscillator comprising;

a first oscillator configured to generate a first signal having a first frequency,

a frequency divider configured to generate a second signal from the first signal, the second signal having a second frequency, and

a first mixer configured to mix the first signal and the second signal to produce a third signal having a third frequency;

a transmitter having a second mixer configured to mix the third signal and a fourth signal; and

a receiver having a third mixer configured to mix the third signal and a fifth signal with a first control signal applied to the programmable divisor input, wherein the third signal and the fourth signal are mixed by the second mixer with a second control signal applied to the programmable divisor input, and wherein the second control signal is different from the first control signal.

38. The device according to claim 23, wherein the device performs orthogonal frequency division multiplexing.

39. The device according to claim 23, wherein the device performs frequency hopping.

40. The device according to claim 23, wherein the device performs direct sequence spread spectrum modulation.

41. The device according to claim 23, wherein the local oscillator and the transmitter are integrated on a single integrated circuit chip.

42. The device according to claim 23, wherein the local oscillator or the transmitter is integrated on an integrated circuit chip.

43. The device according to claim 23, wherein the local oscillator employs CMOS technology.

44. The device according to claim 23, wherein the transmitter employs CMOS technology.

45. The device according to claim 23, wherein the transmitter and the local oscillator employ CMOS technology.

46. The device according to claim 23, wherein the device can be programmed to support a plurality of different wireless spread spectrum modulation techniques.

47. The device according to claim 23, wherein the device supports a plurality of different wireless spread spectrum modulation techniques.

48. The device according to claim 23, wherein the device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using spread spectrum modulation.

49. The device according to claim 23, wherein the device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using direct sequence spread spectrum modulation.

50. The device according to claim 23, wherein the device supports wireless communications using orthogonal frequency division multiplexing and wireless communications using frequency hopping.

51. The device according to claim 23, wherein the device supports wireless communications using orthogonal frequency division multiplexing, wireless communications using frequency hopping and wireless communications using direct sequence spread spectrum modulation.