Coherent Distributed Bistatic Radar Using Wireless Frequency Syntonization and Internode Ranging
Abstract
We present a distributed microwave radar system operating at 4.8 GHz that uses wireless frequency transfer and internode ranging. We implement wireless frequency alignment (syntonization) using a sparse two-tone signal transmitted from the primary node and a self-mixing receiver on the secondary node. The primary node acts as a distributed radar transmitter, sending a linear frequency modulated (LFM) waveform downrange, towards the target. There is also a repeater which retransmits a LFM transmitted from the secondary node that is used to estimate the separation of the node to correct for the phase rotation of the frequency signal due to propagation. The secondary node also locks its oscillator to the primary node and captures the signal reflected from the scene. We demonstrate the ability of the fully wireless distributed radar system to perform bistatic ranging in an outdoor environment at 4.8GHz using software-defined radios. Measurements to a wall yielded a maximum standard deviation of 1.7 cm and a maximum bias of 14.9 cm.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 03, 2023
- Accession Number
- AD1204942
Entities
People
- Anton Schlegel
- Jason M. Merlo
- Jeffrey A. Nanzer
Organizations
- Michigan State University