| EPSRC Reference: |
GR/L53540/01 |
| Title: |
FEASIBILITY STUDY OF LOW WAVEFORM REPETITION FREQUENCY FOR FMCW HF RADARS |
| Principal Investigator: |
Salous, Professor S |
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| Department: |
Electrical Engineering & Electronics |
| Organisation: |
UMIST |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 July 1997 |
Ends: |
30 September 1999 |
Value (£): |
103,343
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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Summary on Grant Application Form |
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HF radar are operated either in skywave mode to ranges of 1000 to 4000 km or in surface wave mode to ranges from 10 to 400km. Applications of HF radar include ship detection, aircraft detection, ice and iceberg detection, repeater tracking and remote sensing of sea surface currents , winds and waves. HF radar systems employ pulse transmissions or frequency modulated continuous wave (FMCW) transmissions. The FMCW transmission avoids the pulse radar requirement for a high peak power and causes less interference to other users of the channel. HF radar's major limitations are: for the skywave mode excess noise caused by ionospheric instability and for the surface wave mode meteors with a monetary doppler spectrum of 50Hz and passing aircraft with a doppler changing within the coherent integration time. Raising the waveform repetition frequency of the radar to combat high doppler rates creates range ambiguities. For pulsed radar these limitations are overcome by using staggered pulses. Since FMCW signals are in widespread use it is essential to find a solution to overcome the range/doppler ambiguity of FMCW radar. It is the aim of this proposal to identify this solution and its implications for the signal processing of the doppler spectrum.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
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| Description |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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