Survey of RF Communications and Sensing Convergence Research <s> A. AUTOMOTIVE RADAR & V2V COMMUNICATIONS <s> Since traditional radar signals are “unintelligent,” regarding the amount of information they convey on the bandwidth they occupy, a joint radar and wireless communication system would constitute a unique platform for future intelligent transportation networks effecting the essential tasks of environmental sensing and the allocation of ad-hoc communication links, in terms of both spectrum efficiency and cost-effectiveness. In this paper, approaches to the design of intelligent waveforms, that are suitable for simultaneously performing both data transmission and radar sensing, are proposed. The approach is based on classical phase-coded waveforms utilized in wireless communications. In particular, requirements that allow for employing such signals for radar measurements with high dynamic range are investigated. Also, a variety of possible radar processing algorithms are discussed. Moreover, the applicability of multiple antenna techniques for direction-of-arrival estimation is considered. In addition to theoretical considerations, the paper presents system simulations and measurement results of complete “RadCom” systems, demonstrating the practical feasibility of integrated communications and radar applications. <s> BIB001 </s> Survey of RF Communications and Sensing Convergence Research <s> A. AUTOMOTIVE RADAR & V2V COMMUNICATIONS <s> The last couple of years, the vehicle industry tends to increase the performance of lights based on led technologies. Nowadays, led systems are used as a standard by motor vehicles manufacturers. Led lights present higher reliability and are more flexible regarding design or power adjustments. Furthermore, led systems are also very convenient for intensity modulation used in telecommunication fields. We developed a very simple data transmission system based on led lights which is highly robust for short or medium distances ± from a few meters up to 15 meters. This visible light communication is dedicated to the cooperation between vehicles and road infrastructures to enhance traffic security. This paper explains the choices and first results on the data transmission performances. In this paper, we present a first prototype of our system and experimental results. <s> BIB002
The smart car revolution has lead the way in research on intelligent transportation systems (ITS). With self-driving cars on the verge of becoming viable, two clear technological needs emerge: vehicle-to-vehicle (V2V) communications and navigational/avoidance radar. Both RF  and light based BIB002 solutions have been proposed for V2V communications as car technology evolves. Further, vehicle radar is already deployed to consumer vehicles for collision avoidance and self-driving features. However, researchers have already started looking at joint radar-communications systems for V2V applications since these needs are so closely coupled BIB002 , BIB001 .