NDLI: Joint carrier frequency and DOA estimation using a modified ULA based MWC discrete compressed sampling receiver

Content Provider	IET Digital Library
Author	Chen, Tao Liu, Lizhi Guo, Limin
Abstract	The uniform linear array (ULA) based modulated wideband converter discrete compressed sampling (CS) receiver is a recently introduced sub-Nyquist sampling scheme for effective acquisition of the carrier frequency (CF) and direction-of-arrival (DOA) of the received radar signal. However, the ULA based system needs to correct the phase differences of the CS data in order to estimate DOA, which would cause a low DOA estimation performance. In this study, the authors propose a modified ULA based system to improve the DOA estimation performance, where another similar branch is added in each antenna to construct the proposed symmetry system. First, the received signal is mixed to basebands. Then, the mixed signals are low-pass filtered and down-sampled to get the CS data. Second, the two branches of the CS data received in one antenna can be utilised to estimate CF. The CS data received in the added branches can be used to estimate DOA without correcting the phase differences. Finally, simulations illustrate the validity of the proposed modified ULA based system and show the proposed system outperforms the ULA based system in DOA estimation when signal-to-noise ratio is more than −10 dB and the number of snapshots is more than 20.
Starting Page	873
Ending Page	881
Page Count	9
ISSN	17518784
Volume Number	12
e-ISSN	17518792
Issue Number	Issue 8, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/12/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2017.0436
Journal	IET Radar, Sonar & Navigation
Publisher Date	2018-04-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Array Signal Processing CS Data Direction of Arrival Estimation Joint Carrier Frequency Low DOA Estimation Performance Low-pass Filter Mixed Signal Modified ULA Based System Modulated Wideband Converter Discrete Compressed Sampling Receiver Noise Figure 10.0 DB Phase Differences Radar Signal Processing Radio Link And Equipment Received Radar Signal Received Signal Recently Introduced Sub-Nyquist Sampling Scheme Signal Processing And Detection Signal Sampling Statistics Symmetry System Uniform Linear Array
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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