Open AccessHigh‐sensitivity OAM phase gradient detection based on time‐modulated harmonic characteristic analysis
Author(s) -
Chen Jingfeng,
Liang Xianling,
He Chong,
Geng Junping,
Jin Ronghong
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.4689
Subject(s) - sensitivity (control systems) , harmonic , phase (matter) , monte carlo method , signal (programming language) , modulation (music) , sampling (signal processing) , physics , optics , computational physics , electronic engineering , acoustics , computer science , mathematics , engineering , detector , statistics , quantum mechanics , programming language
A novel phase gradient method for detecting orbital angular momentum modes is proposed. By utilising a two‐element time‐modulated array, the phase gradient of the received signal is estimated through analysing the modulated harmonic component. The bit error rate performances are evaluated using Monte‐Carlo simulation. Results show that the sensitivity strongly depends on the number of sampling modulation pulses. Compared with the conventional phase gradient receiver, the proposed method obviously enhances the performance of detection.