Sub-Nyquist pulse Doppler MIMO radar

Abstract

Pulse Doppler multiple input multiple output (MIMO) radar allows to simultaneously detect targets' range, azimuth and velocity. Achieving high resolution requires a large number of transmit and receive antennas, as well as high sampling rates leading to a torrent of samples. Overcoming the rate bottleneck, sub-Nyquist sampling methods have been proposed that break the link between single antenna radar signal bandwidth and range resolution. In this work, we present a sub-Nyquist MIMO radar (SUMMeR) system that extends these methods to a multiple antenna setting. We apply the Xampling framework both in time and space, thus reducing both the number of deployed antennas and samples per receiver, without degrading time and spatial resolution, as illustrated in the simulations.

Multi-Point Vehicular Positioning via Millimeter-Wave Transmissions

“…Each TV antenna transmits the superposition of two waveforms for facilitating different operations of COMPOP. One is a signature waveform (a multi-tone waveform) transmission (similar to that in [20]) enabling the SV to estimate the SV-TV system clock difference so as to eliminate its negative effect on the positioning. The second is a SFCW waveform (also a multi-tone waveform) in a separate bandwidth from the signature, which facilitates COMPOP at the SV.…”

“…2) Algorithm Description: The synchronized demodulation (17) enables to express y k m as (20), which can be rewritten in a 3D surface integral form as…”

“…Two types of TV transmissions are considered depending on different purposes. The first is the SFCW transmission enabling to obtain TV's position at the SV, and the second is a signature waveform (SW) transmission [24] to compensate the SV-TV synchronization gap.…”

“…Some intuitions are made from Lemma 1. First, it is shown in (24) that the coordinates of (x a , x b ) can be calculated when θ 1 and θ 2 are given. Second, noting that φ 1 and φ 2 are observable from VPs 1 and 2 directly, θ 2 is easily calculated when θ 1 is given.…”