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A miniaturized multilayer internally multiple-input multiple-output (MIMO) printed antenna system combined with hybrid decoupling elements to improve isolation between two antennas at triple Long-Term Evolution (LTE) bands is presented in this paper. To reduce the single antenna size, the meander lines are stretched perpendicularly on the two respective layers that its overall dimensions are 14 ×...
A novel co-planner multiple-input-multiple-output (MIMO) antenna system combined with decoupling structure for enhancing the port isolation between two antennas at penta Long-Term Evolution (LTE) bands 700MHz, 900MHz, 1800MHz, 2300MHz and 2600MHz operation in this paper. For compact single antenna, the design is used to building a single multi-band antenna with 75×18×1.6 . In the decoupling work,...
A novel multiple-input and multiple-output (MIMO) antenna system combined with decoupling element for enhancing the port isolation between two antennas at triple Long-Term Evolution (LTE) bands is presented in this paper. For compact single antenna, an orthogonal strip layout design is used to build a single antenna with its dimension 14 × 15 × 3.2 mm3 only. A spiral decoupling structure is added...
Spatial division multiple access can be used to boost spectrum efficiency if perfect channel information is available at the transmitter. By using equal-gain beamforming, this paper reformulates the difficult non-convex optimization problem of finding the optimal multiuser beamforming vectors into a convex one. Consequently, the Nash equilibrium solution can be reached based on a non- cooperative...
A 4-port antenna is designed for evaluating the performance of an MIMO system in indoor environment. Diversity gain, correlation coefficient and channel capacity are calculated and discussed in this paper. The selection diversity becomes more unapparent when using more antennas in MIMO system. Correlation in both rich scattering and high K-factor environment are found below 0.2 and 0.5 respectively...
Based on the basic principle of spread spectrum systems, this paper proposes a hybrid automatic-repeat-request (HARQ) scheme with interference mitigation for multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. The proposed hybrid media access control (MAC) and physical layer (PHY) design orthogonally spreads signals in the transmission domain to separate...
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