Superior signal-to-noise ratio of a new AA1 sequence for random-modulation continuous-wave lidar

Adam Rybaltowski*, Allen Taflove

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

In an earlier work [Proc. SPIE 4484, 216 (2001)] we proposed a new AA1 modulation sequence for random-modulation continuous-wave lidar. It possesses significantly better signal properties than other pseudorandom codes (the M, A1, and A2 sequences). We derive and compare the signal-to-noise ratio (SNR) of the new AA1 sequence with those of previous modulation sequences. Using a figure of merit proposed for pseudorandom sequences in additive (and generally colored) noise, we show that the SNR of the AA1 sequence in 1/f noise can be as much as 50 times better than that of the commonly used M sequence. This improved SNR should permit as much as a 7:1 increase of the maximum lidar sensing range in baseband-modulation direct-detection infrared lidar with no significant changes to the transmitter and receiver.

Original languageEnglish (US)
Pages (from-to)1709-1711
Number of pages3
JournalOptics Letters
Volume29
Issue number15
DOIs
StatePublished - Aug 1 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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