Orthogonal wideband hybrid-coding radar waveforms design. Issue 1 (January 2017)

• Record Type: Journal Article
• Authors: Wang, Libao; Gao, Fei; Xu, Jia; Wang, Dangwei; He, Mi; Yuan, Junquan
• Is Part Of: Signal, image and video processing. Volume 11:Issue 1(2017)
• Page Start: 103
• Page End: 111
• Publication Date: 2017-01
• Subjects: Orthogonal waveform -- Waveform design -- Genetic algorithm -- Polyphase coding (PPC) -- Discrete frequency coding (DFC); Signal processing -- Digital techniques -- Periodicals; Image processing -- Digital techniques -- Periodicals; Digital video -- Periodicals; 621.3822
• DOI: 10.1007/s11760-016-0905-6
• Languages: English
• ISSNs: 1863-1703

Abstract

Abstract To obtain wideband orthogonal waveforms of radar systems with high-range resolution and good correlation properties, this paper proposes two types of orthogonal wideband hybrid-coding waveforms, polyphase discrete frequency (PDF) waveforms and polyphase signed-chirp (PSC) waveforms. Using an intra-pulse hybrid modulation, high-range resolution can be obtained, and good correlation properties between different waveforms are easier to optimize within a larger optimization space. Specifically, good correlation properties of the PDF waveforms are indeed easier to achieve without a loss of range resolution, as occurs with a discrete frequency coding waveform. Compared with polyphase coding waveforms, the signal bandwidth of each PSC waveform is twice as large as that of sub-pulse chirp signals, and superior correlation properties are obtained. Finally, various designed waveforms optimized by the genetic algorithm are provided to demonstrate the effectiveness of these proposed wideband hybrid-coding waveforms.