NDLI: Waveform design for radar-embedded communications exploiting spread spectrum technology

Content Provider	IET Digital Library
Author	Li, Baoguo Lei, Jing Cao, Wei Wen, Lei Mou, Yuheng
Abstract	Radar-embedded communication (REC) provides a reliable and low probability of intercept (LPI) communication link to the intended receivers while masking its presence from intercept receivers. This study summarises all the waveform design schemes as well as receiver processing strategies for intra-pulse REC, which forms the communication symbol waveform during one pulse interval and utilises de-correlation processing on the receiver side. Based on the set of eigenvectors after eigen-decomposition of sampled radar waveform, three design approaches are considered: eigenvectors-as-waveforms, weighted-combining and dominant-projection (DP). Specifically, DP performs better than the other two approaches even in multipath environment by using one projection matrix masked random vector to represent a communication symbol. Aimed by the drawbacks of DP, the authors propose a novel waveform generation approach called modified DP (MDP) in this study. MDP uses a common digitally-modulated communication symbol spread by a pseudorandom sequence, so that it can enlarge the Euclidean distances between different data symbols and generate soft information for soft decision decoding, thus improving symbol error ratio and bit error ratio. Simulation results show that MDP significantly improves the reliability performance especially when channel coding is used, while also maintaining a relatively equal anti-intercept performance.
Starting Page	1631
Ending Page	1639
Page Count	9
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 13, Sep (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0936
Journal	IET Communications
Publisher Date	2016-09-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antiintercept Performance Bit Error Ratio Channel Coding Communication Symbol Waveform Data Symbols De-correlation Processing Digitally-modulated Communication Symbol Eigen-decomposition Eigenvectors Euclidean Distances Intercept Communication Link Pseudorandom Sequence Radar Equipment Radar Receiver Radar-embedded Communication Receiver Receiver Processing Strategy Soft Decision Decoding Spread Spectrum Radar Spread Spectrum Technology Symbol Error Ratio System And Application Waveform Design Waveform Generation Approach
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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