Non-coherent pulse compression - aperiodic and periodic waveforms

作者：Levanon Nadav^*; Cohen Itzik; Arbel Nadav; Zadok Avinoam

来源：IET Radar Sonar and Navigation, 2016, 10(1): 216-224.

DOI：10.1049/iet-rsn.2015.0046

• codes
• radar detection
• correlation methods
• noncoherent pulse compression waveform
• aperiodic waveform
• periodic waveform
• noncoherent radar-like system
• Manchester encoding
• mismatched reference
• perfect periodic cross-correlation
• integer number
• two-valued reference sequence
• periodic on-off waveform sequence
• quasiCW noncoherent waveform

The growing interest in adopting pulse compression waveforms to non-coherent radar and radar-like systems (e.g. lidar) invites this update and review. The authors present different approaches of designing on-off {1, 0} coded envelopes of transmitted waveforms whose returns can be envelope detected and non-coherently processed. Two approaches are discussed for the aperiodic case: (a) Manchester encoding and (b) mismatched reference. For the periodic case, on-off sequences are described, which produce perfect periodic cross-correlation when cross-correlated with one or more integer number of periods of a two-valued reference sequence {1, -b}. This study provides comprehensive rules for designing periodic on-off waveforms and their references. The periodic waveform's high-average duty cycle (over 50%) makes it a quasi continuous wave (CW) non-coherent waveform', which avoids the pulse-train conflict between average power and unambiguous range. Good experimental results with a laser range finder are presented. Reports on other uses are quoted.

• 出版日期2016-1