UWB receiver and a data transmission method and system

• US 8,355,425 B2
• Filed: 01/23/2006
• Issued: 01/15/2013
• Est. Priority Date: 01/28/2005
• Status: Active Grant

• Current Assignee: Groupe Des Ecoles Des Telecommunications-Ecole
• Original Assignee: Groupe Des Ecoles Des Telecommunications-Ecole
• Inventors: Ni, Yang
• Primary Examiner(s): Patel, Dhavel
• Application Number:
  US11/795,977
• Publication Number:
  US 20090129441A1
• Time in Patent Office: 2,549 Days
• Field of Search: 375/147, 375/130, 375/149, 375/150, 375/151, 375/152, 375/343, 375/350
• US Class Current: 375/147
• CPC Class Codes: H04B 1/71632 Signal aspects H04B1/7172 and H04B1/7176 take precedence
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 1/7183 Synchronisation

Abstract

The present invention relates to an ultra-wideband signal receiver comprising:

• • at least a first set of sampling cells for sampling the waveform of a received signal;
  • at least a second set of sampling cells for sampling the waveform of the received signal, with a predefined delay δ; and
  • at least one correlator for delivering information depending on the correlation between the waveforms thus sampled.

Claims

1. An ultra-wideband signal receiver comprising:

a first set of sampling cells comprising a first plurality of sampling elements configured to sample a waveform of a received signal;

a second set of sampling cells comprising a second plurality of sampling elements configured to sample a delayed waveform of the received signal; and

a correlator operatively coupled to the first set of sampling cells and to the second set of sampling cells, wherein the correlator is configured to generate an output signal based at least in part on a correlation between the waveform and the delayed waveform.

2. The receiver of claim 1, further comprising:

a first chain of delay elements associated with the first set of sampling cells and configured to control sampling by the first set of sampling cells; and

a second chain of delay elements associated with the second set of sampling cells and configured to control sampling by the second set of sampling cells.

3. The receiver of claim 2, wherein the first chain of delay elements is configured to receive an acquisition signal to control a timing of the sampling by the first set of sampling cells.

4. The receiver of claim 3, further comprising a quartz device configured to generate the acquisition signal.

5. The receiver of claim 3, wherein the second chain of delay includes a first delay element configured to delay the acquisition signal by δ

such that the delayed waveform is delayed by δ

relative to the waveform.

6. The receiver of claim 1, further comprising a single chain of delay elements configured to control sampling of the first set of sampling cells and the second set of sampling cells.

7. The receiver of claim 1, wherein the correlator comprises a parallel cell correlator.

8. The receiver of claim 1, wherein the first set of sampling cells, the second set of sampling cells, and the correlator are part of a monolithic integrated circuit.

9. The receiver of claim 1, wherein the received signal comprises a plurality of impulse multiplets.

10. The receiver of claim 9, wherein impulses of at least one of the impulse multiplets are in phase opposition.

11. The receiver of claim 9, wherein impulses of at least one of the impulse multiplets are in phase.

12. The receiver of claim 9, wherein impulses of at least one of the impulse multiplets occur within a sampling time window for synchronization to be established between the ultra-wideband signal receiver and a transmitting device.

13. The receiver of claim 9, wherein the waveform is sampled at a sampling speed that is greater than or equal to twice a maximum frequency contained in the impulse multiplets.

14. The receiver of claim 1, wherein sampling of the delayed waveform is delayed by a time δ

relative to sampling of the waveform.

15. The receiver of claim 14, wherein the time δ

is based at least in part on a propagation path of the received signal.

16. The receiver of claim 14, wherein the time δ

is between ten nanoseconds and fifty nanoseconds.

17. The receiver of claim 14, wherein the time δ

is constant during a communication session between the ultra-wideband signal receiver and a transmitter.

18. The receiver of claim 14, wherein the time δ

is programmable such that the time δ

varies during a communication session between the ultra-wideband signal receiver and a transmitter.

19. The receiver of claim 18, wherein the time δ

varies based at least in part on a predefined relationship between the ultra-wideband signal receiver and the transmitter.

20. The receiver of claim 14, wherein the received signal comprises a plurality of impulse doublets, and further wherein a pair of the impulse doublets are offset in time by the time δ

.

21. The receiver of claim 1, wherein the received signal includes information that is encoded onto the received signal using at least one of on/off encoding or differential encoding.

22. The receiver of claim 1, wherein the first set of sampling cells samples the waveform by determining a first plurality of voltages corresponding to the waveform, and wherein the second set of sampling cells samples the delayed waveform by determining a second plurality of voltages corresponding to the delayed waveform.

23. The receiver of claim 22, wherein the correlator is configured to:

multiply a first waveform voltage from the first plurality of voltages by a first delayed waveform voltage from the second plurality of voltages to obtain a first product;

multiply a second waveform voltage from the first plurality of voltages by a second delayed waveform voltage from the second plurality of voltages to obtain a second product; and

add the first product and the second product to obtain a sum, wherein the output signal is based at least in part on the sum.

24. The receiver of claim 23, wherein the first waveform voltage is multiplied by the first delayed waveform voltage using a Gilbert cell.

25. A method comprising:

sampling a waveform of a received signal with a first set of sampling cells comprising a first plurality of sampling elements of a receiving device;

sampling a delayed waveform of the received signal with a second set of sampling cells comprising a second plurality of sampling elements of the receiving device, wherein the delayed waveform is delayed by a predefined δ

; and

generating an output signal based at least in part on a correlation between the waveform and the delayed waveform.

26. The method of claim 25, wherein the received signal comprises at least two mutually correlated impulses.

27. The method of claim 26, wherein the two mutually correlated impulses are offset in time by the predefined δ

.

28. The method of claim 25, wherein the received signal is generated by a fast step recovery diode circuit at a transmitter in communication with the receiving device.

29. The method of claim 25, further comprising receiving the received signal from a transmitter in communication with the receiving device.

30. The method of claim 25, wherein the first set of sampling cells comprises between 100 and 300 individual sampling cells.

31. The method of claim 25, further comprising receiving an acquisition signal at the first set of sampling cells, wherein the acquisition signal controls the sampling of the waveform.

32. The method of claim 31, further comprising receiving the acquisition signal at the second set of sampling cells the predefined δ

after the acquisition signal is received at the first set of sampling cells.

33. The method of claim 25, wherein the received signal is received by the first set of sampling cells and by the second set of sampling cells in parallel.

34. The method of claim 25, wherein the received signal is received by the second set of sampling cells after the received signal is received by the first set of sampling cells.

35. A system comprising:

a transmitting device comprising;

a circuit configured to generate a signal; and

a transmitter configured to transmit the signal to a receiving device; and

the receiving device comprising;

a first set of sampling cells comprising a first plurality of sampling elements configured to sample a waveform of the signal;

a second set of sampling cells comprising a first plurality of sampling elements configured to sample a delayed waveform of the signal; and

a correlator operatively coupled to the first set of sampling cells and to the second set of sampling cells, wherein the correlator is configured to generate an output signal based at least in part on a correlation between the waveform and the delayed waveform.

36. The system of claim 35, wherein the circuit comprises a fast step recovery diode circuit.

37. The system of claim 35, wherein the receiving device further comprises a first chain of delay elements associated with the first set of sampling cells and configured to receive an acquisition signal to control sampling of the waveform by the first set of sampling cells.

38. The system of claim 35, wherein sampling of the delayed waveform is delayed by a time δ

relative to sampling of the waveform, wherein the received signal comprises a plurality of impulse doublets, and further wherein a pair of the impulse doublets are offset in time by the time δ

.

39. The system of claim 35, wherein the first set of sampling cells samples the waveform by determining a first plurality of voltages corresponding to the waveform, and wherein the second set of sampling cells samples the delayed waveform by determining a second plurality of voltages corresponding to the delayed waveform.

40. An ultra-wideband signal receiver comprising:

a first set of sampling cells comprising a first plurality of sampling elements configured to sample a waveform of a received signal when an acquisition signal is received;

a second set of sampling cells comprising a second plurality of sampling elements configured to sample the waveform of the received signal when a delayed acquisition signal is received;

a correlator operatively coupled to the first set of sampling cells and to the second set of sampling cells, wherein the correlator is configured to generate an output signal based at least in part on a correlation between a first output of the first set of sampling cells and a second output of the second set of sampling cells.

41. A method comprising:

sampling a waveform of a received signal when an acquisition signal is received with a first set of sampling cells comprising a first plurality of sampling elements of a receiving device;

sampling the waveform of the received signal when a delayed acquisition signal is received with a second set of sampling cells comprising a second plurality of sampling elements of the receiving device; and

generating an output signal based at least in part on a correlation between a first output of the first set of sampling cells and a second output of the second set of sampling cells.

42. A system comprising:

a transmitting device comprising;

a circuit configured to generate a signal; and

a transmitter configured to transmit the signal to a receiving device; and

the receiving device comprising;

a first set of sampling cells comprising a first plurality of sampling elements configured to sample a waveform of the signal when an acquisition signal is received;

a second set of sampling cells comprising a first plurality of sampling elements configured to sample the waveform of the signal when a delayed acquisition signal is received; and

a correlator operatively coupled to the first set of sampling cells and to the second set of sampling cells, wherein the correlator is configured to generate an output signal based at least in part on a correlation between a first output of the first set of sampling cells and a second output of the second set of sampling cells.