Ultra wideband communication system, method and device with low noise reception

• US 20050129153A1
• Filed: 01/31/2005
• Published: 06/16/2005
• Est. Priority Date: 10/10/2000
• Status: Active Grant

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: John W. Mccorkle
• Inventors: McCorkle, John W.
• Granted Patent: US 7,505,538 B2
• Time in Patent Office: Days
• US Class Current: 375/346
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 1/719 Interference-related aspects
• CPC Class Codes: H04L 27/0004 using wavelets

Abstract

An ultra-wide band (UWB) waveform receiver with noise cancellation for use in a UWB digital communication system. The UWB receiver uses a two-stage mixing approach to cancel noise and bias in the receiver. Self-jamming is prevented by inverting a portion of the received signal in the first mixer and then coherently detecting the partially and synchronously inverted signal in the second mixer. Since the drive signals on both mixers are not matched to the desired signal, leakage of either drive signal does not jam the desired signal preventing the receiver from detecting and decoding a weak signal.

Claims

1-3. -3. (canceled)

4. An ultra wideband receiver, comprising:

a self-noise suppression means for suppressing the noise generated by the receiver by using a noise suppression code;

a detection waveform generation means coupled to the self-noise suppression means for receiving ultra wideband wavelets via an antenna and generating a detection waveform having encoded therein a transmitted data source,

wherein the noise suppression code is the same length as a transmit code used to encode the received ultra wideband wavelets,

wherein the noise suppressing code differs in value from the transmit code, and

wherein the noise suppression code and the transmit code do not have inverse values.

5. The ultra wideband receiver of claim 4, further comprising:

an integrator having an input and an output, the input being coupled to the detection waveform generation means, wherein

a signal output by the integrator is used to decode the detection waveform.

6. The ultra wideband receiver of claim 4, further comprising:

a DC bias blocking means for blocking a DC bias component of signals output by the self-noise suppression means.

7-11. -11. (canceled)

12. A two-stage ultra wideband receiving circuit, comprising:

a first stage configured to mix a received signal with a noise suppression code and generate an intermediate signal; and

a second stage configured to mix the intermediate signal with a wavelet to generate an output signal,

wherein the noise suppression code is the same length as a transmit code used to encode the received signal,

wherein the noise suppressing code differs in value from the transmit code, and

wherein the noise suppression code and the transmit code do not have inverse values.

13. The two-stage ultra wideband receiving circuit of claim 12, further comprising an integrator configured to receive and decode the output signal to provide a decoded signal.

14. The two-stage ultra wideband receiving circuit of claim 13, wherein the integrator integrates the output signal separately over two or more portions of the output signal to provide the decoded signal.

15. The two-stage ultra wideband receiving circuit of claim 12, further comprising a DC bias blocking circuit formed between the first stage and the second stage and configured to block a DC bias component of the intermediate signal.

16. The two-stage ultra wideband receiving circuit of claim 12, wherein the noise suppression code is a non-return-to-zero code.