Apparatus and method for ultra wideband communication using dual band pass filter

• US 9,172,425 B2
• Filed: 08/14/2013
• Issued: 10/27/2015
• Est. Priority Date: 08/14/2012
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd., Tsinghua University
• Original Assignee: Samsung Electronics Co. Ltd., Tsinghua University
• Inventors: Rhee, Woogeun, Chen, Fei, Kim, Jong Jin, Kim, Dong Wook, Wang, Zhihua
• Primary Examiner(s): Vuong, Quochien B
• Application Number:
  US13/966,462
• Publication Number:
  US 20140050252A1
• Time in Patent Office: 804 Days
• Field of Search: 455/63.1, 455/67.13, 455/130, 455/131, 455/142, 455/296
• US Class Current: 1/1
• 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 wideband low noise amplifier (LNA) configured to remove noise included in a received UWB signal, and amplify the UWB signal from which the noise is removed;

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

a second BPF configured to filter the amplified 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,

wherein the magnitude of the first filtered signal is configured to be at a minimum at the second center frequency of the second BPF, and

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

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

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

4. 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.

5. The apparatus of claim 4, 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.

6. 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.

7. 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.

8. The apparatus of claim 1, 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.

9. 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:

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

band pass filters (BPFs) configured to perform band pass filtering operations based on differing center frequencies with respect to the amplified 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,

wherein the BPFs comprise;

a first BPF configured to filter the amplified UWB signal to produce a first filtered signal, the first BPF having a first center frequency; and

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

wherein the magnitude of the first filtered signal is configured to be at a minimum at the second center frequency of the second BPF, and

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

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

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

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

filtering the amplified 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 amplified 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,

wherein the magnitude of the first filtered signal is configured to be at a minimum at the second center frequency of the second BPF, and

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

14. The method of claim 13, wherein the demodulating comprises:

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

15. The method of claim 13, 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.

16. The method of claim 13, further comprising:

detecting a magnitude of the first filtered signal; and

detecting a magnitude of the second filtered signal.