UFMC Waveform and Multiple-Access Techniques for 5G RadCom

Imane Khelouani,Raja Elassali,Noureddine Idboufker,Fouzia Elbahhar,Kawtar Zerhouni

doi:10.3390/electronics10070849

Imane Khelouani, Raja Elassali + Show 3 more

Open Access

https://doi.org/10.3390/electronics10070849

Copy DOI

Journal: Electronics	Publication Date: Apr 2, 2021
Citations: 3	License type: CC BY 4.0

Affiliation: Cadi Ayyad University, Université Gustave Eiffel

Abstract

In recent years, multiple functions traditionally realized by hardware components have been replaced by digital-signal processing, making radar and wireless communication technologies more similar. A joint radar and communication system, referred to as a RadCom system, was proposed to overcome the drawbacks of the conventional existent radar techniques while using the same system for intervehicular communication. Consequently, this system enhances used spectral resources. Conventional orthogonal frequency division multiplexing (OFDM) was proposed as a RadCom waveform. However, due to OFDM’s multiple shortcomings, we propose universal filtered multicarrier (UFMC), a new 5G waveform candidate, as a RadCom waveform that offers a good trade-off between performance and complexity. In addition to that, we propose multicarrier code division multiple access (MC-CDMA) as a multiple-access (MA) technique that can offer great performance in terms of multiuser detection and power efficiency. Moreover, we study how UFMC filter length and MC-CDMA spreading sequences can impact overall performance on both radar and communication separately under a multipath channel. Analysis of the bit error rate (BER) of the UFMC waveform was performed in order to confirm the experiment results.

Highlights

In recent years, either dedicated or cellular-based communication standards were developed across the globe to enable vehicular communication
We propose a novel multiuser RadCom system where universal filtered multicarrier (UFMC) is used as the RadCom waveform instead of orthogonal frequency division multiplexing (OFDM)
Afterwards, UFMC and UFMC-code division multiple access (CDMA) communication systems are evaluated over different channels and compared with OFDM

Summary

Introduction

Either dedicated or cellular-based communication standards were developed across the globe to enable vehicular communication. Standardization bodies keep in mind that vehicular communication has stringent requirements. The frequency range was recommended by the International Telecommunication. Union (ITU) [1] to be in the range of 76–81 GHz in order to meet appropriate wireless solutions for automotive RadCom systems. Classical radar waveform designs aim at creating waveforms with optimal autocorrelation properties to minimize sidelobe levels in distance estimation, reducing its estimation errors. One of the most popular signals achieving such a property are linear frequency modulated pulses known as “chirp” signals. Designing a RadCom system on this basis, heavily degrades the symbol rate, which is important for communication systems [2]

Objectives

Results

Conclusion