Digital coherent detection of multi-gigabit 40 GHz carrier frequency radio-over-fibre signals using photonic downconversion

2010 ◽  
Vol 46 (1) ◽  
pp. 57 ◽  
Author(s):  
A. Caballero ◽  
D. Zibar ◽  
I. Tafur Monroy
Keyword(s):  
Carrier Frequency ◽  
Coherent Detection ◽  
Radio Over Fibre

scholarly journals A New Multiple-Symbol Differential Detection Strategy for Error-Floor Elimination of IEEE 802.15.4 BPSK Receivers Impaired by Carrier Frequency Offset

2019 ◽  
Vol 2019 ◽  
pp. 1-26 ◽  
Author(s):  
Gaoyuan Zhang ◽  
Congzheng Han ◽  
Baofeng Ji ◽  
Congyu Shi ◽  
Ping Xie ◽  
...  
Keyword(s):  
Spread Spectrum ◽  
Carrier Frequency ◽  
Ieee 802.15.4 ◽  
Carrier Frequency Offset ◽  
Frequency Offset ◽  
Coherent Detection ◽  
Differential Detection ◽  
Error Floor ◽  
Detection Strategy ◽  
Spectrum Coding

In this paper, we pay our attention towards the noncoherent demodulation aspect of binary phase shift keying (BPSK) receivers for IEEE 802.15.4 wireless sensor networks (WSNs), and a carrier frequency offset invariant as well as error-floor free multiple-symbol differential detection (MSDD) strategy is proposed over the flat fading channel. This detector is an alternative to the multiple-symbol detector that has been considered almost exclusively in the past. In this new configuration, the receivers do not perform chip-level precompensation as in conventional scheme but bit-level postcompensation. That is, the bit-level autocorrelation operation is first implemented with the “raw” chip sample, and then the carrier frequency offset effect (CFOE) embedded in the achieved statistic is compensated. Correspondingly, the cumulative error in the detection metric is decreased so much that the pervasive error floor for the conventional MSDD scheme is suppressed. Also, complexity efficient estimators for the MSDD scheme are reinvestigated, analyzed, and summarized. Simulation results demonstrate that this new detection strategy may achieve rather more encouraging gain from differential and spread spectrum coding than the conventional single differential coherent detection (SDCD) scheme. The pervasive error floor is also eliminated as compared with conventional MSDD scheme even if the most simple estimator is configured under large bit observation length. Then, much transmitting energy may be saved for each chip symbol, which is practically desired for transmit-only nodes in WSNs.

Effect of the degree of phase-correlation of laser sources on the transmission and optical coherent detection in radio-over-fibre systems

2013 ◽  
Author(s):  
Ramón Maldonado-Basilio ◽  
Ran Li ◽  
Sawsan Abdul-Majid ◽  
Hamdam Nikkhah ◽  
Kin-Wai Leong ◽  
...  
Keyword(s):  
Coherent Detection ◽  
Phase Correlation ◽  
Laser Sources ◽  
Radio Over Fibre

High-Carrier-Frequency Iron-Loss Characteristics Excited by GaN FET Single-Phase PWM Inverter

2016 ◽  
Vol 136 (2) ◽  
pp. 110-117 ◽  
Author(s):  
Takahiro Tanaka ◽  
Shoko Koga ◽  
Ryosuke Kogi ◽  
Shunya Odawara ◽  
Keisuke Fujisaki
Keyword(s):  
Carrier Frequency ◽  
Single Phase ◽  
Iron Loss ◽  
Pwm Inverter ◽  
High Carrier ◽  
Gan Fet

An Interference Rejection Combining Technique for an SFBC-OFDM System with Multiple Carrier Frequency Offsets

2016 ◽  
Vol E99.B (2) ◽  
pp. 481-487
Author(s):  
Mina LEE ◽  
Rothna PEC ◽  
Kyu Seok KIM ◽  
Chang Hwan PARK ◽  
Yong Soo CHO
Keyword(s):  
Carrier Frequency ◽  
Interference Rejection ◽  
Ofdm System ◽  
Carrier Frequency Offsets ◽  
Frequency Offsets
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