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The TD-LTE wireless private network for electric power systems is an important component of smart grids, and coverage analysis and interference identification are essential in operating and optimizing of power wireless private networks. This paper presents an approach to analyzing indoor and outdoor coverage scopes of cell radio signals and recognizing locations and sources of intra-network interference...
Same frequency networking (SFN) technology is widely used in modern wireless network to achieve high area spectrum efficiency. However, it brings the inter-cell interference to the users at the cell edge. Frequency allocation and power control is extensively used to diminish the effect of the interference. Most of the researches are focus on the downlink data transmission due to the fact that the...
Massive multi-input multi-output (MIMO) can provide high throughput improvements by using a large number of antennas to serve a small number of terminals simultaneously. Due to channel hardening of massive MIMO, this paper directly investigates the approximate network throughput with zero-forcing beamforming (ZFBF) and conjugate beamforming (CBF) schemes when channel state information (CSI) acquisition...
In this paper, a novel technology, namely, device-to-device communications in the unlicensed spectrum (D2D-U) is proposed, which can allow D2D users to transmit on the unlicensed spectrum and coexist with the incumbent Wi-Fi networks. In D2D-U networks, D2D users can share the licensed spectrum with the existing cellular users or share the unlicensed spectrum with legacy Wi-Fi networks. Therefore,...
This paper proposes limited feedback spatial division multiple access (SDMA) schemes for transmit correlated channels by using statistical channel state information (SCSI) and instantaneous channel state information (ICSI). Different from conventional codebook-based MU-MIMO scheme, the proposed multi-beam selection with single channel quality indicator (CQI) feedback (MBS-SCF) scheme determines the...
In this paper, we propose two improved turbo equalizers for Long Term Evolution (LTE) uplink in presence of transmitter (Tx) in-phase and quadrature-phase imbalance (IQI) which are known at the receiver. For multi-user multiple-input multiple-output (MU-MIMO) single-carrier frequency division multiple access (SC-FDMA) systems, we derive a optimal joint linear turbo equalizer under minimum mean-square...
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