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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yunxia Bao Chi Zhou Peikun He Erke Mao |
| Copyright Year | 2009 |
| Description | Author affiliation: Department of Electronic Engineering, Beijing Institute of Technology, 100081, China (Yunxia Bao; Peikun He; Erke Mao) || Department of ECE, Illinois Institute of Technology, Chicago, 60616, USA (Chi Zhou) |
| Abstract | Stepped-frequency linear frequency modulation (LFM) pulse train is one of the well-known waveforms employed in modern wideband radar to efficiently achieve good range and Doppler resolution without increasing requirements on overall system cost and complexity. Unfortunately, this waveform associates with a drawback of undesirable spikes, known as ‘recurrent lobes or grating lobes’ due to the fixed frequency step. We investigate a generic stepped-frequency LFM pulse train and analyze its significant characteristics by using ambiguity function in more details, especially for zero-Doppler cut and zero-delay cut. Then we propose a method that allows us to reduce grating lobes below a desired threshold level. Two special cases for reduction are discussed for the specific relationships among waveform parameters. Both the analytical and numerical methods for parameter design are given along with distinct examples, which show that selecting a certain larger overlap ratio makes no need to suppress these spikes. |
| Starting Page | 1982 |
| Ending Page | 1988 |
| File Size | 543106 |
| Page Count | 7 |
| File Format | |
| ISBN | 9780982443804 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-07-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | ISIF |
| Subject Keyword | Frequency Gratings Bandwidth Doppler radar Image resolution Signal resolution Phased arrays Chirp modulation Radar countermeasures Radar imaging recurrent lobes Ambiguity function (AF) stepped frequency linear frequency modulation (LFM) reduction |
| Content Type | Text |
| Resource Type | Article |
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