A Simplified Sub-Nyquist Receiver Architecture for Joint DOA and Frequency Estimation

TL;DR

This paper introduces a simplified sub-Nyquist receiver architecture that efficiently estimates joint DOA and frequency of multiple signals, reducing hardware complexity and sampling rate requirements.

Contribution

It presents a novel, simplified receiver design and algorithms for joint DOA and frequency estimation using sub-Nyquist sampling, building on previous work.

Findings

Feasible joint DOA and frequency estimation demonstrated through simulations.

Reduced sampling rate and hardware complexity achieved.

Effective performance of the proposed architecture confirmed.

Abstract

Joint estimation of carrier frequency and direction of arrival (DOA) for multiple signals has been found in many practical applications such as Cognitive Radio (CR). However, Nyquist sampling mechanism is costly or implemented due to wide spectrum range. Taking advantage of sub-Nyquist sampling technology, some array receiver architectures are proposed to realize joint estimation of carrier frequency and DOA. To further decrease equivalent sampling rate and hardware complexity, we propose a simplifying receiver architecture based on our previous work. We come up with joint DOA and frequency estimation algorithms for the novel architecture. The simulations demonstrate that the receiver architecture and the proposed approaches are feasible.