Generation of Coherent Signals for the Verification of Signal Processing Algorithms in Radio Astronomy Next generation radio telescopes (e.g. SKA, ngVLA) are required to meet stringent requirements in signal quality. Simulation methods have been extensively used for both design and verification of the signal chains of these telescopes. A key aspect of the simulation methods is the generation of coherent xe2x80x98noiselikexe2x80x99 test sequences that mimic celestial radiation and the variation of propagation delays to the different receptors due to the rotation of the Earth. The large decimation factors associated with the signal chains of these radio telescopes require the generation of long sequences of coherent wideband signals. An efficient method based on the chirpz transform (CZT) for generating wideband coherent pseudorandom test sequences is presented in the following.

Multipath Suppression for Continuous Wave Radar via Slepian Sequences In continuous wave (CW) radar systems, multiple signal copies impinge the receiver simultaneously. Often, undesired multipath and directpath copies are many times stronger than potential targets. When applying matched filter signal processing techniques, the undesired signal components can mask weaker targets and decrease performance of postprocessing techniques, such as target indication or estimation. In this manuscript, we propose a method of rejecting multipathscattered returns over a continuous region in range and Doppler. We explore the computational cost of this method and additionally propose an approximate method of rejection which leverages the wellknown discrete prolate spheroidal sequences (DPSS)xe2x80x93typically referred to as Slepian sequencesxe2x80x93to gain a computational advantage. Results are shown to decrease the effective noise floor when applying matched filtering techniques as well as increase target signaltointerferenceplusnoise ratio (SINR) outside of an undesired multipath region. Comparisons are shown to traditional CW multipath removal in terms of rejection performance and runtime.