An invitation to hypercomplex phase retrieval: Theory and applications [hypercomplex signal and image processing]

R Jacome, KV Mishra, BM Sadler… - IEEE Signal Processing …, 2024 - ieeexplore.ieee.org
Hypercomplex signal processing (HSP) provides state-of-the-art tools to handle
multidimensional signals by harnessing the intrinsic correlation of the signal dimensions …

Phase retrieval for radar waveform design

S Pinilla, KV Mishra, BM Sadler… - … and Inference: A …, 2024 - academic.oup.com
The ability of a radar to discriminate in both range and Doppler velocity is completely
characterized by the ambiguity function (AF) of its transmit waveform. Mathematically, it is …

Octonion phase retrieval

R Jacome, KV Mishra, BM Sadler… - IEEE Signal Processing …, 2024 - ieeexplore.ieee.org
Signal processing over hypercomplex numbers arises in many optical imaging applications.
In particular, spectral image or color stereo data are often processed using octonion algebra …

WaveMax: FrFT-based convex phase retrieval for radar waveform design

S Pinilla, KV Mishra, B Sadler - 2021 IEEE International …, 2021 - ieeexplore.ieee.org
We consider the recovery of a complex band-limited radar waveform from the magnitude of
the fractional Fourier transform (FrFT) formulation of its ambiguity function (AF). This is …

Group-theoretic wideband radar waveform design

KV Mishra, S Pinilla, A Pezeshki… - … on Information Theory …, 2022 - ieeexplore.ieee.org
We investigate the theory of affine groups in the context of designing radar waveforms that
obey the desired wideband ambiguity function (WAF). The WAF is obtained by correlating …

WaveMax: Radar Waveform Design via Convex Maximization of FrFT Phase Retrieval

S Pinilla, KV Mishra, BM Sadler - ar**
One distinguished feature of cognitive radar is the ability of intelligent sensing, which relies
much on the transmit waveform in a self-perpetuating manner. On the one hand, the transmit …

Unique Bispectrum Inversion for Signals with Finite Spectral/Temporal Support

S Pinilla, KV Mishra, BM Sadler - ICASSP 2023-2023 IEEE …, 2023 - ieeexplore.ieee.org
Retrieving a signal from its triple correlation spectrum, also called bispectrum, arises in a
wide range of signal processing problems. Conventional methods do not provide an …