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In current cellular networks, Spatial Modulation with Orthogonal Frequency Division Multiplexing (SM OFDM) is a newly designed transmission method that substitutes Multiple Input Output (MIMO) OFDM transmission. practical frameworks, estimation of the channel vital for recovering transmitted data. conventional DFT-based algorithm, impact noise reduced in time domain. It retains significant valu...

Metasurfaces are two-dimensional arrangements of optical scatterers rationally arranged to control optical wavefronts. Despite the significant advances made in wavefront engineering through metasurfaces, most of these devices are designed for and operate at a single wavelength. Here we show that spatial multiplexing schemes can be applied to increase the number of operation wavelengths. We use ...

In this paper, we study opportunistic round robin (ORR) uplink scheduling for vertical Bell Labs layered space-time architecture (V-BLAST) systems over multiuser multiple-input multiple-output (MIMO) channels. The proposed ORR scheduling method is compared to greedy scheduling. In greedy scheduling, the base station selects the best user based on a certain criterion without any consideration fo...

In this paper, we evaluate the performance of the Hybrid-MIMO Receiver Scheme (HMRS) in Cognitive Radio network (CR-network). We investigate the efficiency of the proposed scheme which the energy level and user number of primary user are varied according to the characteristic of CR-network. HMRS can allow users to transmit either Space-Time Block Code (STBC) or Spatial-Multiplexing (SM) streams...

We consider an uplink multi-user scenario and investigate the use of reconfigurable intelligent surfaces (RIS) to optimize spatial multiplexing performance when a linear receiver is used. study two different formulations problem, namely maximizing effective rank minimum singular value RIS-augmented channel. employ gradient-based optimization solve problems compare solutions in terms sum-rate ac...

Given a Space-Time Block Code (STBC) Multiple-Input Multiple-Output SpatialMultiplexing system (MIMO-SM), both diversity gain and spatial multiplexing gain can be obtained simultaneously [1, 2]. An optimum decision algorithm is proposed to achieve an additional weight gain in the Multiple-Input Multiple-Output (MIMO) Space-Time Block Coding (STBC) wireless system design without increased hardwa...

Long Term Evolution (LTE) is a standard for the future wireless technology and a step towards the fourth generation (4G). The current generation of mobile telecommunication standard is 3G and the limitations in response time, download speed and cost led to the development of LTE.LTE uses Multiple-Input Multiple-Output (MIMO) technologies with four antennas in conjunction with Orthogonal Frequen...