Cooperative Passive Coherent Location: A Promising 5G Service to Support Road Safety

Abstract

5G promises many new vertical service areas beyond simple communication and data transfer. We propose CPCL (cooperative passive coherent location), a distributed MIMO radar service, which can be offered by mobile radio network operators as a service for public user groups. CPCL comes as an inherent part of the radio network and takes advantage of the most important key features proposed for 5G. It extends the well-known idea of passive radar (also known as passive coherent location, PCL) by introducing cooperative principles. These range from cooperative, synchronous radio signaling, and MAC up to radar data fusion on sensor and scenario levels. By using software-defined radio and network paradigms, as well as real-time mobile edge computing facilities intended for 5G, CPCL promises to become a ubiquitous radar service which may be adaptive, reconfigurable, and perhaps cognitive. As CPCL makes double use of radio resources (both in terms of frequency bands and hardware), it can be considered a green technology. Although we introduce the CPCL idea from the viewpoint of vehicle-tovehicle/infrastructure (V2X) communication, it can definitely also be applied to many other applications in industry, transport, logistics, and for safety and security applications.Index Terms-5G verticals, vehicle-to-x (V2X), cooperative driving, intelligent transport systems (ITS), joint communication and radar, passive coherent location (PCL), passive OFDM radar, distributed MIMO radar network, radar resource management, high-resolution radar parameter estimation All authors are with the Technische Universität Ilmenau (Ilmenau University of Technology). Carsten Andrich, Michael Döbereiner, and Giovanni Del Galdo are with the Fraunhofer IIS.

OFDM waveform for distributed radar sensing in automotive scenarios

“…This paper builds on the concept of CPCL, an OFDM-based, distributed radar sensing approach, that applies to mobile communication scenarios [3]. Due to the nature of a communication system, the placement of the Tx/Rx corresponds to that of passive radar.…”

“…. , M. As the receiver repeats the channel estimation for each OFDM symbol m, we obtain the matrix in (3).…”

“…In contrast, this paper 1 presents an experimental demonstration of the OFDM radar technique for a distributed radar sensing system with bi-static geometry in an automotive scenario. With the evaluation, we attempt to demonstrate its general feasibility and efficiency for an approach as introduced in [3]. We start by providing a short introduction to the OFDM radar in section "OFDM radar sensing".…”

Localization of Discrete Mobile Scatterers in Vehicular Environments Using Delay Estimates

“…Exploiting the network structure and evaluating the individual links allows to infer the location and velocity of road users. A similar idea is followed in [5], where all devices that transmit signals are considered as possible illuminators of opportunity. That means, besides static network nodes also mobile devices can be used.…”

“…Following the idea of the surveillance systems of [4] and [5], this paper presents a complementary localization approach. The corresponding measurement model is derived and performance bounds are provided.…”