were proposed later on by [PERSON] and al. and published in their invited paper [7] in 2011. In their previous paper, the authors focused on the use of OFDM RadCom systems for vehicular applications. In fact, OFDM-based signals can easily provide the range and velocity estimation of targets surrounding the transmitter while offering robustness against multipath fading and simple equalization for communicating targets. However, OFDM is very sensitive to the Doppler shift, which can cause intercarrier interference (ICI), thereby deteriorating the communication aspect of the RadCom system. In addition, OFDM radar systems require a high cyclic prefix (CP) padded to the transmitted signal to preserve the time orthogonality of the modulation symbols and prevent intersymbol interference (ISI), but at the cost of reduced spectral efficiency since the CP part of the signal is not used for either detection or communication. In order to overcome the shortcomings of CP-OFDM, multiple candidate waveforms for 5G were investigated over the course of the past few years. To relax the orthogonality condition, they rely on different designs of synthesis functions. Universal filtered multi-carrier (UFMC) is one of the most attractive 5G waveforms candidates, and it was first introduced in [8]. It offers a good trade-off between performance and complexity, and it is suitable for supporting multiple services [9; 10]. Applying filtering per groups of subcarriers [11] (namely, sub-bands), UFMC achieves low out-of-band (OOB) emissions while keeping the simplicity of OFDM [12]. In fact, UFMC decomposes the frequency spectrum into narrow-band orthogonal subcarriers in the complex plane, making use of straightforward OFDM knowledge [12]. More specifically, in the UFMC scheme, the entire band of subcarriers \(N_{c}\) is subdivided into \(S\) sub-bands, with \(Q\) subcarriers each, such that \(S\times Q\leq N_{c}\). Each sub-band is then filtered by a prototype filter of length \(L\) and shifted to the appropriate sub-band frequency [11]. As long as the same length of sub-band filter is used [12], subcarriers in UFMC are orthogonal in the complex plane. Hence, UFMC can use quadrature amplitude modulation (QAM) constellation. Moreover, a RadCom system must be able to operate over a multiuser V2X communication scenario; hence, the need for multiple-access techniques imposes itself. The use of code division multiple access (CDMA) with direct-sequence spread spectrum (DS-CDMA) was proposed in 2015 [13] and earlier in 2006 in [14]. This technique proved to have great range and velocity estimation while allowing for multiple users to share the same time-frequency resource using unique orthogonal codes. However, the conventional DS-CDMA spreads user data to a short-duration chip, causing a wide band transmission. In addition, a complex receiver is needed in order to reduce severe ISI. MC-CDMA, as presented in [15], is an efficient multiple-access technique, where CDMA is associated with multicarrier waveforms to benefit from the simplicity of multicarrier modulation and demodulation while increasing the spectral efficiency provided by the superposition of multiple users. However, MC-CDMA studies were limited to only the OFDM waveform. Consequently, we chose to extend state-of-the-art work, combine CDMA with the UFMC waveform, and evaluate its performance in a vehicular environment. In this paper, we propose a novel multiuser RadCom system where UFMC is used as the RadCom waveform instead of OFDM. The UFMC can offer great power efficiency thanks to the omission of the CP, and retain compatibility with the conventional OFDM signal, which achieves low system complexity. We also propose MC-CDMA as a multiaccess technique in order to support multiuser transmission and increase power efficiency. Meanwhile, the novel system is evaluated with and without MC-CDMA in terms of bit error rate (BER), and a mathematical analysis model of the BER is established and compared with the OFDM RadCom system.