A photonic transmission link with enhanced dynamic range by incorporating phase shifters in dual drive dual parallel Mach–Zehnder modulator

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sarika Singh ◽  
Sandeep K. Arya ◽  
Shelly Singla ◽  
Pulkit Berwal
Keyword(s):  
Dynamic Range ◽  
Control Method ◽  
Phase Shifters ◽  
Optical Modulator ◽  
Rf Signals ◽  
Single Sideband Modulation ◽  
Spurious Free Dynamic Range ◽  
Optical Single Sideband ◽  
Mach Zehnder Modulator ◽  
Free Dynamic

Abstract A linearization scheme is proposed for microwave photonic link to enlarge spurious free dynamic range using a dual-electrode dual parallel Mach–Zehnder modulator (MZM). This scheme employs phase control method to improve performance of the link by adjusting phase of radio frequency (RF) signals and bias voltages of optical modulator. Optical single sideband modulation is achieved through sub-modulators of dual parallel MZM which increases efficiency of the link. The simulated results show that third order intermodulation distortion is suppressed by 28 dB when the input RF signals are 9.1 and 9.5 GHz and noise floor is at −161 dBm/Hz. The spurious free dynamic range is also improved by 12.6 dB.

A dual parallel Mach–Zehnder modulator linearization scheme based on 90° phase shifters

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sarika Singh ◽  
Sandeep K. Arya ◽  
Shelly Singla ◽  
Pulkit Berwal
Keyword(s):  
Dynamic Range ◽  
Phase Shifters ◽  
Complete Suppression ◽  
Third Order ◽  
Two Phase ◽  
Spurious Free Dynamic Range ◽  
Non Linear ◽  
Transmission Link ◽  
Mach Zehnder Modulator ◽  
Intermodulation Distortions

Abstract In this paper, a dual-drive dual-parallel Mach–Zehnder Modulator based linearization scheme is implemented by utilizing only two phase shifters and comprehensively demonstrated for a photonic transmission link. Third order intermodulation distortion is suppressed by adjusting angles of electrical phase shifters i.e. π/2 and−π/2 and a non-linear distortion immune system can be proposed for microwave photonic link. A complete suppression in intermodulation terms and 20.8 dB enhancements are found in spurious free dynamic range (SFDR). SFDR reaches 135.6 dB Hz4/5 by suppressing major spurious contributors of third order intermodulation distortions in optical domain only which ensures the improvement in performance of link against non-linear terms.

scholarly journals Slope efficiency and spurious-free dynamic range of silicon Mach-Zehnder modulator upon carrier depletion and injection effects

2013 ◽  
Vol 21 (14) ◽  
pp. 16570 ◽  
Author(s):  
Xianshu Luo ◽  
Xiaoguang Tu ◽  
Junfeng Song ◽  
Lu Ding ◽  
Qing Fang ◽  
...  
Keyword(s):  
Slope Efficiency ◽  
Dynamic Range ◽  
Spurious Free Dynamic Range ◽  
Mach Zehnder Modulator ◽  
Free Dynamic

System-Level Mitigation of Undersampling ADC Nonlinearity for High-IF Radio Receivers

Frequenz ◽  
2012 ◽  
Vol 66 (9-10) ◽  
Author(s):  
Georg Vallant ◽  
Michael Epp ◽  
Markus Allén ◽  
Mikko Valkama ◽  
Friedrich K. Jondral
Keyword(s):  
Software Defined Radio ◽  
High Speed ◽  
Dynamic Range ◽  
System Level ◽  
General Validity ◽  
Radio Receivers ◽  
Rf Signals ◽  
Spurious Free Dynamic Range ◽  
Digital Linearization ◽  
Free Dynamic

AbstractOver the last years ongoing advances in ADC technology have enabled RF signals to be sampled at IF frequencies. Undersampling is nowadays employed in software-defined radio or radar receivers and offers the possibility to relieve requirements in the analog receiver partition. Unfortunately, when moving to higher IF concepts, this becomes demanding for the ADC itself, because of inherent spurious-free dynamic range (SFDR) roll-off that increases with input frequency. This fact often limits the receiver's IF placement to Nyquist zone (NZ) 2. In this work the emerging concept of Digital Assistance is pursued to give the receiver access to higher NZs while making no compromise on the SFDR. We will present and discuss post-correction results for two 16-bit high-speed converters from two different vendors at 120 and 125 MSPS, respectively. The proposed system-level post-correction decomposes nonlinearity into a static and a dynamic part. For both ADCs under investigation the degraded SFDR in higher NZs could be improved by up to 15 dB using purely digital linearization technologies, thus increasing the detectability of small signals in the presence of very strong signals or interferers. Near-identical results for both ADCs confirm the general validity of the system-level correction approach.

scholarly journals Statistic Model of Homodyne Acousto-Optic Spectrum Analyzer

2020 ◽  
Vol 23 (1) ◽  
pp. 52-62
Author(s):  
L. A. Aronov ◽  
Yu. S. Dobrolensky ◽  
G. V. Kulak
Keyword(s):  
Shot Noise ◽  
Dynamic Range ◽  
Spectrum Analyzer ◽  
Optical Modulator ◽  
Accurate Estimation ◽  
Spurious Free Dynamic Range ◽  
Readout Noise ◽  
Signal Dynamic Range ◽  
Signal Dynamic ◽  
Free Dynamic

Introduction. Acousto-optic spectrum analyzers interferometric schemes have been developed to increase dynamic range. It was assumed that dynamic range, expressed in dB, would double. An expected increase was not achieved yet.Aim. To analyze the homodyne acousto-optic spectrum analyzer noise characteristics, to estimate the signal-tonoise ratio and the dynamic range.Materials and methods. A mathematical model was compiled which took into account the need to form quadrature components to obtain an amplitude spectrum of an input signal, shot noise and readout noise.Results. An interferometric scheme did not allow to achieve dynamic range doubling compared to an acoustooptical power spectrum analyzer. The dynamic range increase was less than 1.35 dB. Constant illumination led to a significant increase of the spectrum analyzer self-noise due to shot noise, compared to which thermal noise and readout noise became insignificant. The spurious-free dynamic range estimation expression was obtained. It was prior determined by acousto-optic interaction nonlinearity. With typical analyzer blocks parameters the spurious-free dynamic range covered a single-signal dynamic range. Signal-to-noise ratio estimation expression was presented.Conclusion. The homodyne acousto-optic spectrum analyzer single-signal dynamic range is determined primarily by the photosensor saturation charge. One needs to optimize their relation by taking into account light source power, acousto-optical modulator diffraction efficiency and photosensor saturation charge. Presented noise model gives more accurate estimation of the dynamic range with an error of 1 dB.

Photonic receiving and linearization of RF signals with improved spurious free dynamic range

2018 ◽  
Vol 423 ◽  
pp. 17-20 ◽  
Author(s):  
Xiang Zhu ◽  
Tao Jin ◽  
Hao Chi ◽  
Guochuan Tong ◽  
Tianhao Lai ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Rf Signals ◽  
Spurious Free Dynamic Range ◽  
Free Dynamic

Large Spurious-free Dynamic Range RoF Link with Tunable CSR

2021 ◽  
Author(s):  
Ruiqiong Wang ◽  
Yangyu Fan ◽  
Jiajun Tan ◽  
Yongsheng Gao
Keyword(s):  
Dynamic Range ◽  
Spurious Free Dynamic Range ◽  
Free Dynamic

Synergy Micro-Electronics Technology with a High Linearity BiCMOS Sample-and-Hold Circuit

2013 ◽  
Vol 473 ◽  
pp. 50-53
Author(s):  
Jie Lin ◽  
Fei Yan Mu
Keyword(s):  
Dynamic Range ◽  
Harmonic Distortion ◽  
High Accuracy ◽  
Pipeline Adc ◽  
Nonlinearity Error ◽  
Front End ◽  
Sample And Hold ◽  
Spurious Free Dynamic Range ◽  
Bicmos Process ◽  
Free Dynamic

A high accuracy BiCMOS sample and hold (S/H) circuit employed in the front end of a12bit 10 MS/s Pipeline ADC is presented. To reduce the nonlinearity error cause by the sampling switch, a signal dependent clock bootstrapping system is introduced. It is implemented using 0.6 um BiCMOS process. An 88.77 dB spurious-free dynamic range (SFDR), and a -105.20 dB total harmonic distortion (THD) are obtained.

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