Millimetre-wave imaging with reduced number of degrees of freedom in array signal processing: concepts for enhanced angular resolution
This paper deals with millimetre-wave imaging systems based on linear receiving arrays and is focused on the issue of angular resolution and coverage for arrays where the number M of ports is smaller than the number N of elements due to forming of subarrays. For a wide angular coverage a trade-off b...
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| Published in | Advances in radio science Vol. 1; no. 9; pp. 119 - 124 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English German |
| Published |
Copernicus GmbH
05.05.2003
Copernicus Publications |
| Subjects | |
| Online Access | Get full text |
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| Summary: | This paper deals with millimetre-wave imaging systems based on linear receiving arrays and is focused on the issue of angular resolution and coverage for arrays where the number M of ports is smaller than the number N of elements due to forming of subarrays. For a wide angular coverage a trade-off between a narrow beam width and a high side-lobe suppression is shown to occur which requires proper synthesis of the subarray pattern. Two concepts for an enhanced angular resolution are presented. The first uses a combination of a frequency dependent distribution network (frequency scanning) with array signal processing to enhance angular resolution by cost of a reduced range resolution. The second approach takes advantage of relative movements to enhance angular resolution via a combined angular and temporal (Doppler) processing. |
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| ISSN: | 1684-9973 1684-9965 1684-9973 |
| DOI: | 10.5194/ars-1-119-2003 |