## 1 Introduction  
The next generation of mobile networks (5G) is being deployed [1, 2, 3], which will bring new challenges and opportunities, enabling the creation and integration of new networks such as the Internet of Things (IoT), meeting the explosive growth in data traffic and lower latency requirements demanded in today's communications and enabling and improving the quality of services in a multitude of applications, such as social networking, media streaming, video calls, and other broadband services [4, 5, 6, 7, 8, 9]. In this sense, 5G cellular communication networks are expected to have a more reliable transmission link, better connectivity, and to approach the challenges involved with the mobility scenarios. The 3 rd Generation Partnership Project (3 GPP) has standardized the new radio waveform of the 5G new mobile generation [10, 11], which proposes several ways for spectral efficiency and capacity improvement. The key enablers among the alternative approaches proposal can be found, for example, massive multi-input multi-output (mMIMO), ultra-dense network, millimeter-wave (mmWave), cell-free mMIMO, and co-operative networks, which can be achieved via the development of many access points of different types; that is why it is possible to have a higher resource block per unit area, improving the capacity of the user equipment (UE) and communication networks [12, 13, 14, 15, 16]. The co-operative architecture has been introduced and standardized within the 5G communication networks paradigm [17] by the 3 GPP, for which the key benefits are enabling the flexible and very dense deployment of the new radio base station without increasing the cost-effective of its implementation. In this context, a diverse range of scenarios can be encompassed, as indoor-to-outdoor, outdoor-to-indoor, mobile urban, and rural environments [18; 19; 20; 21]. It should be highlighted that the co-operative architecture for LTE communication network has been studied and standardized by the 3 GPP [22], for which the most common relaying protocols proposed are the amplify-and-forward (A&F) and decode-and-forward (D&F) [23; 24]. Nevertheless, due to the expensiveness of existing LTE mobile networks spectrum for backhaul link and small-cell deployments, it has been limited and restricted in its handful of commercial deployment in LTE timeline. co-operative 5G network is expected to achieve more commercial deployment than relay node co-operative LTE architecture due to mmWave communications, for which the key challenge is undertaken by the very high propagation loss being substantially limited by distance in comparison with LTE frequency band. co-operative architecture simple is composed of base station, relay node (RN), and UE, where the backhaul link is established between gnodeB and relaying technology, therefore, the access link is considered between relay node and UE, as been described in [16]. In-band and out-of-band backhauling with respect to the access link can be used to implement the co-operative network, and the relay node can support access and backhaul in sub-6 GHz (FR1) and above-6 GHz (FR2) spectrum, as has been defined by the 3 GPP in [17]. Therefore, the main advantage to achieve a commercial success of the relay node co-operative network is the limited coverage of mmWave access, which creates a higher demand for backhauling deployment. In addition, the mmWave spectrum provides a more economically viable opportunity to deployment of wireless backhauling, being a key advantage over fiber [25]. At present, there are several testbench platforms to implement and evaluate the wireless communication technologies, which, with the Industry 4.0. is expected to increment demand to design and deploy the new nodes proposed by the 5G mobile communication network. Some platforms are based on field programmable gate arrays (FPGAs); however, their high cost hinders the usage by the research communities.