Coordinating complementary waveforms for sidelobe suppression

Published

Journal Article

We present a general method for constructing radar transmit pulse trains and receive filters for which the radar point-spread function in delay and Doppler, given by the cross-ambiguity function of the transmit pulse train and the pulse train used in the receive filter, is essentially free of range sidelobes inside a Doppler interval around the zero-Doppler axis. The transmit pulse train is constructed by coordinating the transmission of a pair of Golay complementary waveforms across time according to zeros and ones in a binary sequence P. The pulse train used to filter the received signal is constructed in a similar way, in terms of sequencing the Golay waveforms, but each waveform in the pulse train is weighted by an element from another sequence Q. We show that a spectrum jointly determined by P and Q sequences controls the size of the range sidelobes of the cross-ambiguity function and by properly choosing P and Q we can clear out the range sidelobes inside a Doppler interval around the zero-Doppler axis. The joint design of P and Q enables a tradeoff between the order of the spectral null for range sidelobe suppression and the signal-to-noise ratio at the receiver output. We establish this trade-off and derive a necessary and sufficient condition for the construction of P and Q sequences that produce a null of a desired order. © 2011 IEEE.

Full Text

Duke Authors

Cited Authors

  • Dang, W; Pezeshki, A; Howard, S; Moran, W; Calderbank, R

Published Date

  • December 1, 2011

Published In

Start / End Page

  • 2096 - 2100

International Standard Serial Number (ISSN)

  • 1058-6393

Digital Object Identifier (DOI)

  • 10.1109/ACSSC.2011.6190398

Citation Source

  • Scopus