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This paper presents a receiver antenna synchronization and carrier frequency offsets pre-mitigation procedure, which is proposed for distributed massive MIMO system. The technique's performance is dependent to the SNR as well as the number of OFDM symbols per transmission packet. It has been shown that the procedure is working using a rapid prototyping platform based on WARP board. The MIMO system...
Massive MIMO has been recognized as a promising technology to meet the demand for higher data capacity for mobile networks in 2020 and beyond. Although promising, each base station needs accurate estimation of the channel state information (CSI), either through feedback or channel reciprocity schemes in order to achieve the benefits of massive MIMO in practice. Time division duplex (TDD) has been...
This paper explores the benefits of application layer forward error correction (AL-FEC) based on Raptor codes for high quality video multicasting over 802.11n multiple-input multiple-output (MIMO) channels. A cross-layer Wi-Fi simulator in combination with a state-of-the-art ray tracing propagation tool was used to analyse the performance of spatial multiplexing (SM) and space time block coding (STBC)...
This paper introduce a new approach for implementation of soft computing methodology of fuzzy cognitive map to control the parameters of Direct Expansion (DX) air-conditioning (A/C) systems. In the past few decades, the application of different controllers on heating, ventilating and air-conditioning system and also air conditioning system separately are considered due to a high demand of these appliances...
5G, a future generation cellular networks is expected to meet the increasing demand of continuous growing mobile users and the emergence of services such as internet of things (IoT), machine-to-machine communication (M2M). Massive MIMO has been identified as a promising technology that offers orders-of-magnitude improvements in spectral-efficiency over 4G technologies. However, one of the major limiting...
Interference alignment (IA) can achieve the optimal degrees of freedom in interference-limited wireless systems. Popular IA schemes assume perfect global knowledge of the MIMO channels at all transmitters and receivers. In this paper, we investigate the error rate performance of interference alignment in MIMO M ×2 X systems at practical signal to noise ratios. Through theoretical analysis and Monte...
This paper proposes a channel tracking technique for MIMO-OFDM system, in order to solve timing sensitivity issue with the pilot-based Channel Estimator (CE) reported in [1]. The proposed technique exploits the pilot symbols embedded within the OFDM symbol to estimate the MIMO channel coefficients. Then the estimated channel values of the pilot subcarriers, as well as the initial LTF-based channel...
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