A Flexible 5G Receiver Architecture Adapted to VLSI Implementation
A flexible data frame structure adapted to 5G operations and designed to support high bandwidth pipes or sporadic traffic is described. The frame structure imposes to consider receiver architectures that are adapted to orthogonal frequency division mutlip
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Abstract. A flexible data frame structure adapted to 5G operations and designed to support high bandwidth pipes or sporadic traffic is described. The frame structure imposes to consider receiver architectures that are adapted to orthogonal frequency division mutliplexing (OFDM) for structured synchronous traffic and alternative flexible asynchronous waveforms such as filterbank multicarrier (FBMC) for sporadic traffic. OFDM and FBMC receivers are reviewed and a new flexible receiver architecture is then proposed and described. The design of the new architecture is centered on a memory unit complemented with co-processor units improving the flexibility of the digital signal processing operations of the receiver. The architecture is particularly adapted to application specific integrated circuit. The throughput imposed on the memory and the associated data receiver bus has been evaluated. The evaluation concluded that the throughput is suitable for very large scale integration implementations.
Keywords: FBMC
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· OFDM · LTE · 5G · Architecture
Introduction
So far, the appetite for broadband service has fueled the development of mobile cellular networks. Mobile communications started with wireless real time voice communications in the first and second generations of cellular systems (1G and 2G) to provide reliable voice connectivity everywhere. It was then followed by internet data connectivity in the third generation (3G) when the adoption of laptop computers became widespread to bring internet on-the-go. Finally, the advent of the smart-phone accelerated the demand for high bandwidth with the world information accessed at the tip of everyone’s finger everywhere at anytime. Therefore, the aim to deliver high-bandwidth pipes has logically been the main driver for the current fourth generation (4G) also called Long Term Evolution (LTE) and LTE-Advanced (LTE-A). In order to maximize spectral efficiency, strict synchronization and orthogonality between users within a single cell is imposed by LTE and LTE-A standards. However, sporadic traffic has emerged as an important service for future generations of cellular networks (5G). Machine Type Communications (MTC) c ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2016 D. Noguet et al. (Eds.): CROWNCOM 2016, LNICST 172, pp. 487–497, 2016. DOI: 10.1007/978-3-319-40352-6 40
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V. Berg and J.-B. Dor´e
devices of the Internet of Things are expected to inherently generate sporadic data traffic to the network and should not be forced to be integrated into the constrained synchronization procedure of LTE-A in order to limit signaling overhead. Furthermore, a previously unforeseen mechanism designed to save battery usage of the handset also called fast dormancy has resulted in significant control signaling growth. This mechanism causes the user equipment (UE) to go into a deep sleep mode and break any connection to the network. When the UE changes back to an active state the mobile has to go through a complete synchronization procedure again. This phe
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