LISA Data Analysis: Doppler Demodulation
Author post print is also available at arXiv.org and is available for download through link above.
The orbital motion of the Laser Interferometer Space Antenna (LISA) produces amplitude, phaseand frequency modulation of a gravitational wave signal. The modulations have the eﬀect of spreading a monochromatic gravitational wave signal across a range of frequencies. The modulations encode useful information about the source location and orientation, but they also have the deleteriousaﬀect of spreading a signal across a wide bandwidth, thereby reducing the strength of the signalrelative to the instrument noise. We describe a simple method for removing the dominant, Doppler,component of the signal modulation. The demodulation reassembles the power from a monochromatic source into a narrow spike, and provides a quick way to determine the sky locations andfrequencies of the brightest gravitational wave sources.
Cornish, N. J., Larson, S. L., May 2003. LISA data analysis: Doppler demodulation. Classical and Quantum Gravity 20 (10), S163+. URL http://dx.doi.org/10.1088/0264-9381/20/10/319