Channel estimation, equalisation, and evaluation for high-mobility airborne hyperspectral data transmission

2016 ◽  
Vol 10 (18) ◽  
pp. 2656-2662 ◽  
Author(s):  
Vahid Vahidi ◽  
Ali Pour Yazdanpanah ◽  
Ebrahim Saberinia ◽  
Emma E. Regentova
Keyword(s):  
Channel Estimation ◽  
Data Transmission ◽  
High Mobility ◽  
Hyperspectral Data

QoS-Constrained Resource Allocation Scheduling for LTE Network

2015 ◽  
Vol 4 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Hung-Chin Jang ◽  
Yun-Jun Lee
Keyword(s):  
Resource Allocation ◽  
Data Transmission ◽  
Orthogonal Frequency Division Multiplexing ◽  
Transmission Rate ◽  
High Mobility ◽  
System Throughput ◽  
Frequency Division ◽  
High Data ◽  
Single Carrier ◽  
Allocation Method

The goal of LTE (Long Term Evolution) is to provide high data transmission rate, scalable bandwidth, low latency, high-mobility, etc. LTE employs OFDM (Orthogonal Frequency Division Multiplexing) and SC-FDMA (Single Carrier - Frequency Division Multiple Access) for downlink and uplink data transmission, respectively. As to SC-FDMA, there are two constraints in doing resource allocation. First, the allocated resource blocks (RBs) should be contiguous. Second, those of the allocated RBs are forced to use the same modulation technique. The aim of this research is to propose a QoS-constraint resource allocation scheduling to enhance data transmission for uplink SC-FDMA. The proposed scheduling is a three-stage approach. In the first stage, it uses a time domain scheduler to differentiate user equipment (UE) services according to their distinct QoS service requirements. In the second stage, it uses a frequency domain scheduler to prioritize UE services based on channel quality. In the third stage, it limits the number of times of modulation downgrade of RBs allocation in order to enhance system throughput. In the simulations, the proposed method is compared to fixed sub-carrier dynamic resource allocation method and adaptive dynamic sub-carrier resource allocation method. Simulation results show that the proposed method outperforms the other two methods in terms of throughput, transmission delay, packet loss ratio, and RB utilization.

scholarly journals Fundamental Tradeoff Between Doppler Diversity and Channel Estimation Errors in SIMO High Mobility Communication Systems

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 21867-21878 ◽  
Author(s):  
Mahamuda Alhaji Mahamadu ◽  
Jingxian Wu ◽  
Zheng Ma ◽  
Weixi Zhou ◽  
Youhua Tang ◽  
...  
Keyword(s):  
Channel Estimation ◽  
Communication Systems ◽  
High Mobility ◽  
Estimation Errors ◽  
Channel Estimation Errors ◽  
Doppler Diversity
Sign in / Sign up

Export Citation Format

Share Document