Abstract
Next generation wireless communication networks intend to take advantage of the integration of terrestrial and aerospace infrastructures. Besides, multiple-input multiple-output (MIMO) architecture is the key technology, which has brought the wireless gigabit vision closer to reality. In this direction, high-altitude platforms (HAPs) could act as relay stations in the stratosphere transferring information from an uplink to a downlink MIMO channel. This paper investigates the performance of a novel transmission scheme for the delivery of mobile-to-mobile (M-to-M) services via a stratospheric relay. It is assumed that the source, relay, and destination nodes are equipped with multiple antennas and that amplify-and-forward (AF) relaying is adopted. The performance is analyzed through rigorous simulations in terms of the bit-error rate (BER) by using a recently proposed 3D geometry-based reference model in spatially correlated flat-fading MIMO channels, employing a hierarchical broadcast technique and minimum mean square error (MMSE) receivers.
Highlights
Mobile-to-mobile (M-to-M) communications are expected to be a fundamental component of future mobile ad hoc networks, intelligent highway vehicular systems (IHVS), broadband mobile multimedia services, and relay-based cellular networks
The successful design and deployment of multiple-input multiple-output (MIMO) M-to-M via stratospheric relay (MMSR) systems require a detailed knowledge of the underlying radio channel and the mechanisms of radio wave propagation
This paper focuses on the performance of minimum mean square error (MMSE) detectors at the receivers over spatially correlated double-Rician flat-fading MIMO MMSR channels, since these receivers offer better performance than ZF receivers and avoid the noise-enhancement effect
Summary
Mobile-to-mobile (M-to-M) communications are expected to be a fundamental component of future mobile ad hoc networks, intelligent highway vehicular systems (IHVS), broadband mobile multimedia services, and relay-based cellular networks. Since impairments of the signal are mainly caused by the environment near the user, the starting point of the performance evaluation is a recently proposed three-dimensional (3D) reference geometry-based model for MIMO MMSR channels in dual-hop amplify-and-forward (AF) networks [23]. This model enables a realistic positioning of the scatterers in the vicinity of the source and the destination and assumes that these scatterers are nonuniformly distributed within two cylinders, which reflect the influence of two heterogeneous 3D nonisotropic scattering environments.
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