Channel (broadcasting)

Engineering

Sampling (signal processing)

Cognitive radio

MIMO

Electronic engineering

Bandwidth (computing)

Nyquist–Shannon sampling theorem

Computer science

Transmitter

Radar

Wireless

Nyquist rate

Telecommunications

Spatial multiplexing

Detector

Nyquist frequency

IEEE Transactions on Aerospace and Electronic Systems

We present a cognitive prototype that demonstrates a colocated, frequency-division-multiplexed, multiple-input multiple-output (MIMO) radar, which implements both temporal and spatial sub-Nyquist sampling. The signal is sampled and recovered via the Xampling framework. Cognition is due to the fact that the transmitter adapts its signal spectrum by emitting only those subbands that the receiver samples and processes. Real-time experiments demonstrate sub-Nyquist MIMO recovery of target scenes with 87.5% spatio-temporal bandwidth reduction and signal-to-noise-ratio of -10 dB.

A Cognitive Sub-Nyquist MIMO Radar Prototype