Low-Cost and Power-Efficient Massive MIMO Precoding: Architecture and Algorithm Designs

2020 ◽  
Vol 69 (7) ◽  
pp. 7429-7442
Author(s):  
Jung-Chieh Chen
Keyword(s):  
Massive Mimo ◽  
Low Cost ◽  
Power Efficient ◽  
Mimo Precoding

scholarly journals Quantized Polar Transmitters for Power Efficient Massive MIMO Systems

2020 ◽  
pp. 1-1
Author(s):  
Guixian Xu ◽  
Vesa Lampu ◽  
Marko Kosunen ◽  
Kari Stadius ◽  
Jussi Ryynanen ◽  
...  
Keyword(s):  
Massive Mimo ◽  
Mimo Systems ◽  
Power Efficient ◽  
Polar Transmitters

scholarly journals Proficient Car Parking System Based on Cluster Head Routing Protocol Utilizing IEEE 802.15.4

2016 ◽  
Vol 12 (06) ◽  
pp. 58
Author(s):  
Razi Iqbal ◽  
Sharif Arif ◽  
H.H.R Sherazi
Keyword(s):  
Communication Technology ◽  
Routing Protocol ◽  
Ieee 802.15.4 ◽  
Low Cost ◽  
Cluster Head ◽  
Power Efficient ◽  
Proposed Model ◽  
Efficient Communication ◽  
Parking System ◽  
The Coordinator

The paper discusses a proposed model for car parking system based on cluster head routing protocol utilizing a low cost and power efficient communication technology, ZigBee (IEEE 802.15.4). The model is designed in a way that car parking is divided into different clusters and each cluster has a head which acts a messenger for transmitting information to other heads and the coordinator of the network. Each cluster head is a ZigBee Host (Router) which collects the information of car presence in the parking slot. This information is then passed to the coordinator of the network which is used to display the information of available parking slots in a specific car parking area. Since there is only one coordinator in the network, so heads can transmit information to the coordinator using multi-hop communication if direct communication is not possible. Several simulations were performed to gauge the efficiency of the proposed model, and results show that the proposed model is reliable in communication and efficient in its operation.

scholarly journals Energy Efficiency of mmWave Massive MIMO Precoding With Low-Resolution DACs

2018 ◽  
Vol 12 (2) ◽  
pp. 298-312 ◽  
Author(s):  
Lucas N. Ribeiro ◽  
Stefan Schwarz ◽  
Markus Rupp ◽  
Andre L. F. de Almeida
Keyword(s):  
Energy Efficiency ◽  
Massive Mimo ◽  
Low Resolution ◽  
Mimo Precoding

POXN: A New Passive Optical Cross-Connection Network for Low-Cost Power-Efficient Datacenters

2014 ◽  
Vol 32 (8) ◽  
pp. 1482-1500 ◽  
Author(s):  
Wenda Ni ◽  
Changcheng Huang ◽  
Yunqu Leon Liu ◽  
Weiwei Li ◽  
Kin-Wai Leong ◽  
...  
Keyword(s):  
Low Cost ◽  
Power Efficient ◽  
Cross Connection

scholarly journals Development of a low-cost biogas filtration system to achieve higher-power efficient AC generator

2018 ◽  
Author(s):  
Edison E. Mojica ◽  
Ar-Ar S. Ardaniel ◽  
Jeanlou G. Leguid ◽  
Andrea T. Loyola
Keyword(s):  
Low Cost ◽  
Power Efficient ◽  
Filtration System ◽  
Higher Power

scholarly journals Low-Cost and Secure Communication System for SCADA System of Remote Microgrids

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Amjad Iqbal ◽  
M. Tariq Iqbal
Keyword(s):  
Data Storage ◽  
Communication System ◽  
Secure Communication ◽  
Low Cost ◽  
Data Logging ◽  
Local Data ◽  
Authentication Code ◽  
Power Efficient ◽  
Scada System ◽  
Sd Card

Renewable energy-based local microgrids are gaining popularity despite the unavailability of low-cost, power efficient, and secure communication system for its supervisory control and data acquisition (SCADA) system. This research has been carried out to address this issue along with the additional features such as data uploading to a server through a gateway, local data logging, and alerting the concerned crew in case of any fault to minimize the outage time. This paper presents the design of a communication system for the SCADA system of microgrid. ESP32 with LoRa has been used for communication between two nodes or a node and central SCADA unit. Communication security has been achieved by implementing AES cryptography. Data authenticity has been achieved by introducing a unique message authentication code (MAC) for each message. A mesh-like network has been implemented to improve the LoRa range. ESP32 and dragino-uno based LoRa gateways have been tried for uploading the data to the server, and local data storage has been achieved using an SD card. The main controller working as the SCADA unit has the feature of sending emails. Detailed system design and test results are presented in this paper.

scholarly journals A Survey on Massive MIMO Systems in Presence of Channel and Hardware Impairments

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 164 ◽  
Author(s):  
Zahra Mokhtari ◽  
Maryam Sabbaghian ◽  
Rui Dinis
Keyword(s):  
Massive Mimo ◽  
Orthogonal Frequency Division Multiplexing ◽  
Mimo Systems ◽  
Low Cost ◽  
Multiple Input Multiple Output ◽  
Base Station ◽  
Aging Effects ◽  
Hardware Impairments ◽  
Single Carrier ◽  
Input Multiple Output

Massive multiple input multiple output (MIMO) technology is one of the promising technologies for fifth generation (5G) cellular communications. In this technology, each cell has a base station (BS) with a large number of antennas, allowing the simultaneous use of the same resources (e.g., frequency and/or time slots) by multiple users of a cell. Therefore, massive MIMO systems can bring very high spectral and power efficiencies. However, this technology faces some important issues that need to be addressed. One of these issues is the performance degradation due to hardware impairments, since low-cost RF chains need to be employed. Another issue is the channel estimation and channel aging effects, especially in fast mobility environments. In this paper we will perform a comprehensive study on these two issues considering two of the most promising candidate waveforms for massive MIMO systems: Orthogonal frequency division multiplexing (OFDM) and single-carrier frequency domain processing (SC-FDP). The studies and the results show that hardware impairments and inaccurate channel knowledge can degrade the performance of massive MIMO systems extensively. However, using suitable low complex estimation and compensation techniques and also selecting a suitable waveform can reduce these effects.

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