Low Complexity Single-Step Digital Backpropagation for High-order QAM Subcarrier-Multiplexing Transmission

2017 ◽  
Author(s):  
Zhuopeng Xiao ◽  
Qunbi Zhuge ◽  
Songnian Fu ◽  
Fangyuan Zhang ◽  
Meng Qiu ◽  
...  
Keyword(s):  
Low Complexity ◽  
Single Step ◽  
High Order ◽  
Subcarrier Multiplexing

scholarly journals Low-Complexity Detection of High-Order QAM Faster-Than-Nyquist Signaling

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 14579-14588 ◽  
Author(s):  
Ebrahim Bedeer ◽  
Mohamed Hossam Ahmed ◽  
Halim Yanikomeroglu
Keyword(s):  
Low Complexity ◽  
High Order

scholarly journals A Single-Step Method for Over-the-Horizon Geolocation Using Importance Sampling

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Jiexin Yin ◽  
Ding Wang ◽  
Bin Yang ◽  
Xin Yang
Keyword(s):  
Importance Sampling ◽  
Low Complexity ◽  
Single Step ◽  
Step Method ◽  
Position Information ◽  
Importance Function ◽  
Localization Performance ◽  
Monte Carlo Importance Sampling ◽  
Simulation Results ◽  
Cramer Rao Bound

This paper investigates the geolocation for an over-the-horizon (OTH) transmitter observed by widely separated arrays. We propose a maximum likelihood (ML) based direct position determination (DPD) method to directly locate the transmitter in a single step by exploiting the position information embedded in azimuth angles. The Monte Carlo importance sampling (IS) technique is employed to find an approximate global solution to this DPD problem, where the importance function analogous to Gaussian distribution is derived. This enables the transmitter to be precisely located with low complexity in a noniterative manner. Additionally, we derive the Cramér–Rao bound (CRB) expression for the investigated problem. The simulation results corroborate the superior localization performance of the proposed method with respect to the conventional two-step approaches and the iterative DPD method.

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