scholarly journals Laser-phase-fluctuation-insensitive offset-frequency-spaced two-tone optical coherent detection scheme and its transmission for radio-over-fiber systems

2015 ◽  
Vol 23 (19) ◽  
pp. 24140 ◽  
Author(s):  
Toshiaki Kuri ◽  
Takahide Sakamoto ◽  
Tetsuya Kawanishi
Keyword(s):  
Phase Fluctuation ◽  
Radio Over Fiber ◽  
Coherent Detection ◽  
Detection Scheme ◽  
Offset Frequency

Laser-Phase-Fluctuation-Insensitive Optical Coherent Detection Scheme for Radio-over-Fiber System

2014 ◽  
Vol 32 (20) ◽  
pp. 3803-3809 ◽  
Author(s):  
Toshiaki Kuri ◽  
Takahide Sakamoto ◽  
Guo-Wei Lu ◽  
Tetsuya Kawanishi
Keyword(s):  
Phase Fluctuation ◽  
Radio Over Fiber ◽  
Coherent Detection ◽  
Fiber System ◽  
Detection Scheme ◽  
Radio Over Fiber System

scholarly journals Realization of multiplierless coherent detection scheme in digital domain

1988 ◽  
Vol 76 (10) ◽  
pp. 1394-1395
Author(s):  
Kang Cheol-Ho ◽  
Ryu Heunggyoon ◽  
C.H. Lee
Keyword(s):  
Coherent Detection ◽  
Detection Scheme

Output Signal Frequency Optional Full-duplex Radio over Fiber System Based on Coherent Detection

2020 ◽  
Vol 49 (5) ◽  
pp. 506004
Author(s):  
雷珂珂 LEI Ke-ke ◽  
罗吴金 LUO Wu-jin ◽  
谢胜超 XIE Sheng-chao ◽  
张诗友 ZHANG Shi-you ◽  
韩一石 HAN Yi-shi
Keyword(s):  
Output Signal ◽  
Radio Over Fiber ◽  
Coherent Detection ◽  
Full Duplex ◽  
Signal Frequency ◽  
Fiber System ◽  
Radio Over Fiber System

scholarly journals Advanced Noncoherent Detection in Massive MIMO Systems via Digital Beamspace Preprocessing

Telecom ◽  
2020 ◽  
Vol 1 (3) ◽  
pp. 211-227
Author(s):  
Stephan Bucher ◽  
Christian Waldschmidt
Keyword(s):  
Mimo Systems ◽  
Near Field ◽  
Multiple Input Multiple Output ◽  
Low Complexity ◽  
Base Station ◽  
Coherent Detection ◽  
Noncoherent Detection ◽  
Detection Scheme ◽  
Channel Knowledge ◽  
Residual Performance

Noncoherent detection in massive multiple-input/multiple-output (MIMO) uplink systems provides a low-complexity alternative to its coherent counterpart. Requiring no actual channel knowledge but the per-user induced power at the base station, comparable performance as channel-estimation-based detection can be achieved when the users are located in the near-field of the base station. However, noncoherent detection fails in scenarios where users are in the far-field due to an insufficient capability to separate the users in terms of their spatially induced power. For this purpose, a dielectric lens or an analog beamforming structure can be employed, which are capable to focus the power of the incident waves to a smaller subset of the antennas at the base station. These so-called analog beamspace techniques have been demonstrated to enable again the noncoherent detection scheme. Analogous to a spatial Fourier transform, beamspace techniques can be also realized in the digital domain offering more flexibility. Its applicability to noncoherent detection is studied in this paper. It is shown numerically that by means of digital beamspace preprocessing, considerable performance gains can be achieved. Applied in dominant line-of-sight channels, a large number of users can be accommodated and the residual performance gap to coherent detection with perfect channel knowledge is minimal.

Radio over fiber link with adaptive order n-QAM optical phase modulated OFDM and digital coherent detection

2011 ◽  
Vol 53 (10) ◽  
pp. 2245-2247 ◽  
Author(s):  
Valeria Arlunno ◽  
Robert Borkowski ◽  
Neil Guerrero Gonzalez ◽  
Antonio Caballero ◽  
Kamau Price ◽  
...  
Keyword(s):  
Radio Over Fiber ◽  
Coherent Detection ◽  
Optical Phase ◽  
Fiber Link
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