APPARATUS AND METHOD FOR ULTRA WIDEBAND COMMUNICATION USING DUAL BAND PASS FILTER

• US 20140050252A1
• Filed: 08/14/2013
• Published: 02/20/2014
• Est. Priority Date: 08/14/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd., Tsinghua University
• Original Assignee: Samsung Electronics Co. Ltd., Tsinghua University
• Inventors: RHEE, Woogeun, KIM, Dong Wook, WANG, Zhihua, CHEN, Fei, KIM, Jong Jin
• Granted Patent: US 9,172,425 B2
• Time in Patent Office: Days
• US Class Current: 375/148
• CPC Class Codes: H03D 3/26 by means of sloping amplitude/frequency characteristic of tuned or reactive circuit H03D3/28 - H03D3/32 takes precedence
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 1/719 Interference-related aspects

Abstract

An apparatus and method for ultra wideband (UWB) communication, using a dual band pass filter (BPF) is disclosed. The UWB communication apparatus may include a first BPF performing a first band pass filtering with respect to a UWB signal, a second BPF that has a center frequency differing from a center frequency of the first BPF, and performs a second band pass filtering with respect to the UWB signal, a first envelope detector that detects a size of a first signal filtered in the first BPF, a second envelope detector that detects a size of a second signal filtered in the second BPF, and a demodulator that demodulates a UWB signal, using the size of the first signal and the size of the second signal.

Claims

1. An apparatus for ultra wideband (UWB) communication, comprising:

a first band pass filter (BPF) configured to filter a UWB signal to produce a first filtered signal, the first BPF having a first center frequency;

a second BPF configured to filter the UWB signal to produce a second filtered signal, the second BPF having a second center frequency that differs from the first center frequency; and

a demodulator configured to demodulate the UWB signal using a magnitude of the first filtered signal and a magnitude of the second filtered signal.

2. The apparatus of claim 1, wherein the demodulator is configured to increase a signal to noise ratio (SNR) of the UWB signal through increasing a difference between the magnitude of the first filtered signal and the magnitude of the second filtered signal.

3. The apparatus of claim 1, further comprising:

a low noise amplifier (LNA) configured to remove noise included in the UWB signal, and amplify the UWB signal from which the noise is removed.

4. The apparatus of claim 1, wherein the magnitude of the first signal is configured to be at a maximum at the first center frequency, and the magnitude of the first signal decreases at frequencies that are increasingly distant from the first center frequency, and

the magnitude of the second signal is configured to be at a maximum at the second center frequency, and the magnitude of the second signal decreases at frequencies that are increasingly distant from the second center frequency.

5. The apparatus of claim 4, wherein the magnitude of the first signal is configured to be at a minimum at the second center frequency, and

the magnitude of the second signal is configured to be at a minimum at the first center frequency.

6. The apparatus of claim 1, wherein the demodulated UWB signal is produced with a greater signal to noise (SNR) ratio than a noisy UWB signal.

7. The apparatus of claim 6, wherein the noisy UWB signal is a frequency modulation (FM) signal and the demodulated UWB signal is an amplitude modulation (AM) signal that corresponds to the noisy UWB signal.

8. The apparatus of claim 1, wherein the first BPF is configured to perform the first band pass filtering operation with respect to an edge signal associated with the first center frequency, and

the second BPF is configured to perform the second band pass filtering operation with respect to an edge signal associated with the second center frequency.

9. The apparatus of claim 1, wherein the first BPF and the second BPF are configured to perform the first band pass filtering operation and the second band pass filtering operation, respectively, with respect to the UWB signal and configured to convert a frequency modulation (FM) signal to an amplitude modulation (AM) signal.

18. The apparatus of claim 3, the low noise amplifier (LNA), configured to:

receive a noisy UWB signal, comprising signal information and noise information; and

process the noisy UWB signal to produce a processed UWB signal, wherein the processed UWB signal comprises amplified signal information and reduced noise information.

19. The apparatus of claim 1, further comprising:

a first envelope detector configured to detect a magnitude of the first filtered signal;

a second envelope detector configured to detect a magnitude of the second filtered signal.

10. An apparatus for ultra wideband (UWB) communication, comprising:

band pass filters (BPFs) configured to perform band pass filtering operations based on differing center frequencies with respect to a UWB signal;

envelope detectors configured to detect magnitudes of filtered signals on which the band pass filtering operations are performed; and

a demodulator configured to demodulate the UWB signal, using differences detected between the filtered signals.

11. The apparatus of claim 10, wherein the demodulator is configured to increase a signal to noise ratio (SNR) of the UWB signal through increasing a magnitude difference between the UWB signals detected.

12. The apparatus of claim 10, further comprising:

a low noise amplifier (LNA) configured to remove noise included in the UWB signal, and amplify the UWB signal from which the noise is removed.

13. The apparatus of claim 10, wherein the demodulator is configured to calculate a difference between the UWB signals detected, using at least one of a subtractor or an adder.

14. A method for ultra wideband (UWB) communication, comprising:

filtering a UWB signal to produce a first filtered signal, using a first band pass filter (BPF), the first BPF having a first center frequency;

filtering the UWB signal to produce a second filtered signal, using a second BPF, the second BPF having a second center frequency that differs from the first center frequency; and

demodulating the UWB signal, using the magnitude of the first filtered signal and the magnitude of the second filtered signal.

15. The method of claim 14, wherein the demodulating comprises:

increasing a signal to noise ratio (SNR) of the UWB signal through increasing a magnitude difference between the first signal and the second signal.

16. The method of claim 14, further comprising:

removing noise included in the UWB signal, and amplifying a signal from which the noise is removed.

17. The method of claim 14, wherein the performing of the first filtering comprises:

performing the first filtering with respect to an edge signal associated with a center frequency of the first BPF, and

the performing of the second filtering comprises;

performing the second filtering operation with respect to an edge signal associated with a center frequency of the second BPF.

20. The method of claim 14, further comprising:

detecting a magnitude of the first filtered signal; and

detecting a magnitude of the second filtered signal.