TY - JOUR
T1 - High-resolution low-sidelobe laser ranging based on incoherent pulse compression
AU - Kravitz, Daniel
AU - Grodensky, Daniel
AU - Levanon, Nadav
AU - Zadok, Avi
N1 - Funding Information:
Manuscript received June 28, 2012; revised September 10, 2012; accepted September 28, 2012. Date of publication October 3, 2012; date of current version November 20, 2012. This work was supported in part by the German-Israeli Foundation under Grant I-2219-1978.10/2009.
PY - 2012
Y1 - 2012
N2 - A technique for high-resolution laser detection and ranging with strong sidelobe suppression is experimentally demonstrated. This method relies on the transmission of a long unipolar sequence of intensity-modulated pulses, the incoherent direct detection of reflected echoes, and subsequent processing by proper digital filters at the receiver end. The obtained sidelobe suppression nearly replicates that of the bipolar sequences, even though the transmitted sequence is unipolar. Both the transmitted sequence and the receiver-end filter are derived from a bipolar code through a pulse position modulation algorithm. Mismatched filters are used for further sidelobe suppression. Due to the processing gain, ranging measurements are successfully performed at signal-to-noise ratios as low as -20 dB.A range change of 2.5 cm is accurately resolved. The proposed method provides the sidelobe suppression of a complex coherent receiver while using simple incoherent detection.
AB - A technique for high-resolution laser detection and ranging with strong sidelobe suppression is experimentally demonstrated. This method relies on the transmission of a long unipolar sequence of intensity-modulated pulses, the incoherent direct detection of reflected echoes, and subsequent processing by proper digital filters at the receiver end. The obtained sidelobe suppression nearly replicates that of the bipolar sequences, even though the transmitted sequence is unipolar. Both the transmitted sequence and the receiver-end filter are derived from a bipolar code through a pulse position modulation algorithm. Mismatched filters are used for further sidelobe suppression. Due to the processing gain, ranging measurements are successfully performed at signal-to-noise ratios as low as -20 dB.A range change of 2.5 cm is accurately resolved. The proposed method provides the sidelobe suppression of a complex coherent receiver while using simple incoherent detection.
KW - Laser detection and ranging (LADAR)
KW - matched filtering
KW - optical signal processing
KW - pulse compression
KW - ranging measurements
UR - http://www.scopus.com/inward/record.url?scp=84870400059&partnerID=8YFLogxK
U2 - 10.1109/LPT.2012.2222367
DO - 10.1109/LPT.2012.2222367
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:84870400059
SN - 1041-1135
VL - 24
SP - 2119
EP - 2121
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 23
M1 - 6320614
ER -