# System and method for detection of dispersed broadband signals

## Abstract

A system and method for detecting the presence of dispersed broadband signals in real time are disclosed. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos[l brace]2[phi](t)[r brace]. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase [phi](t), the trajectory of a joint time-frequency representation of x(t) is used as an approximationmore »

- Inventors:

- Issue Date:

- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (United States)

- OSTI Identifier:
- 6325821

- Patent Number(s):
- 5910905 A

- Application Number:
- PPN: US 8-744435

- Assignee:
- National Instruments Corp., Austin, TX (United States) PTO; EDB-99-080902

- DOE Contract Number:
- W-7405-ENG-36

- Resource Type:
- Patent

- Resource Relation:
- Patent File Date: 8 Nov 1996

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 42 ENGINEERING; DATA ANALYSIS; DATA TRANSMISSION; DESIGN; DETECTION; ELECTRONIC EQUIPMENT; REAL TIME SYSTEMS; SIGNALS; USES; COMMUNICATIONS; EQUIPMENT; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)

### Citation Formats

```
Qian, S., and Dunham, M.E.
```*System and method for detection of dispersed broadband signals*. United States: N. p., 1999.
Web.

```
Qian, S., & Dunham, M.E.
```*System and method for detection of dispersed broadband signals*. United States.

```
Qian, S., and Dunham, M.E. Tue .
"System and method for detection of dispersed broadband signals". United States.
```

```
@article{osti_6325821,
```

title = {System and method for detection of dispersed broadband signals},

author = {Qian, S. and Dunham, M.E.},

abstractNote = {A system and method for detecting the presence of dispersed broadband signals in real time are disclosed. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos[l brace]2[phi](t)[r brace]. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase [phi](t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of [phi][prime](t). 10 figs.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1999},

month = {6}

}