Rake receiver

• US 7,346,136 B1
• Filed: 06/18/2003
• Issued: 03/18/2008
• Est. Priority Date: 06/20/2002
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Staccato Communications Incorporated
• Inventors: Aiello, Roberto
• Primary Examiner(s): Tran, Khai
• Application Number:
  US10/465,830
• Time in Patent Office: 1,735 Days
• Field of Search: 375/347, 375/130, 375/316, 375/328, 375/324, 375/267, 455/260, 455/553.1, 332/167
• US Class Current: 375/347
• CPC Class Codes: H03D 3/007 by converting the oscillations into two quadrature related signals H03D3/245 takes precedence

Abstract

A receiver system and method are disclosed for processing multipath propagated signals and multiband signals. The receiver includes a zero-intermediate frequency converter for demodulating one of the plurality of multipath propagated signals to produce a demodulated signal; and a sampling module for sampling the demodulated signal.

Claims

1. A receiver for processing a plurality of multipath propagated signals, comprising:

a receiver configured to receive at least one of the plurality of multipath propagated signals, wherein the plurality of multipath propagated signals are associated with an ultra-wideband signal;

a zero-intermediate frequency converter for demodulating at least one of the plurality of multipath propagated signals to produce a demodulated signal;

a first sampling module for sampling a first sampling input signal that is associated with (1) the demodulated signal and (2) a first one of the plurality of multipath propagated signals; and

a second sampling module for sampling a second sampling input signal that is associated with (1) the demodulated signal and (2) a second one of the plurality of multipath propagated signals.

2. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, wherein the zero-intermediate frequency converter includes a mixer for mixing the at least one of the plurality of multipath propagated signals with a reference signal.

3. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, further including a frequency synthesizer for generating a reference signal, wherein the zero-intermediate frequency converter includes a mixer for mixing the at least one of the plurality of multipath propagated signals with the reference signal.

4. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, wherein the zero-intermediate frequency converter includes a first mixer for mixing the at least one of the plurality of multipath propagated signals with a first reference signal and a second mixer for mixing the at least one of the plurality of multipath propagated signals with a second reference signal having a phase shift relative to the first reference signal.

5. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, wherein the zero-intermediate frequency converter includes a first mixer for mixing the at least one of the plurality of multipath propagated signal with a first reference signal to obtain an I component;

and a second mixer for mixing the at least one of the plurality of multipath propagated signal with a second reference signal having a 90°

phase shift relative to the first reference signal to obtain a Q component.

6. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, wherein the plurality of multipath propagated signals includes multiband signals.

7. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, wherein the sampling module includes a track-and-hold module and a analog-to-digital converter for digitizing the output of the track-and-hold module.

8. A receiver for processing a plurality of multipath propagated signals as recited in claim 1, further including a baseband processor for processing the output of the sampling module.

9. A method for processing a plurality of multipath propagated signals comprising:

receiving at least one of the plurality of multipath propagated signals, wherein the plurality of multipath propagated signals are associated with an ultra-wideband signal;

demodulating at least one of the plurality of multipath propagated signals using zero-intermediate frequency conversion to produce a demodulated signal;

sampling a first sampling input signal that is associated with (1) the demodulated signal and (2) a first one of the plurality of multipath propagated signals; and

sampling a second sampling input signal that is associated with (1) the demodulated signal and (2) a second one of the plurality of multipath propagated signals.

10. A method for processing a plurality of multipath propagated signals as recited in claim 9, wherein sampling includes sampling a plurality of demodulated signals to produce a plurality of sampled signals and the method further comprises combining the plurality of sampled signals.

11. A method for processing a plurality of multipath propagated signals as recited in claim 9, wherein the plurality of multipath propagated signals includes multiband signals.

12. A method for processing a plurality of multipath propagated signals as recited in claim 9, further comprising selecting a subband.

13. A method for processing a plurality of multipath propagated signals as recited in claim 9, further comprising selecting a subband using a matched filter.

14. A method for processing a plurality of multipath propagated signals as recited in claim 9, wherein demodulating includes generating a continuous reference signal using a local oscillator.

15. A method for processing a plurality of multipath propagated signals as recited in claim 9, wherein demodulating includes mixing the multipath propagated signals with a reference signal.

16. A method for processing a plurality of multipath propagated signals as recited in claim 9, wherein demodulating includes mixing the multipath propagated signals with a reference signal and a phase shifted version of the reference signal.