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Iterative phase noise Suppression for Full-Duplex Communication Systems

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China Communications 2023年第2期20卷 226-234页

作者： Pengxin Guan Yiru Wang Hongkang Yu Yuping Zhao School of Electronics Engineering and Computer Science Peking UniversityBeijing 100871China Wireless Product Research and Development Institute ZTE CorporationShenzhen 518057China

Oscillator phase noise is one of the bottlenecks that limits the self-interference(SI)cancellation capability of full-duplex systems.In this paper,we propose a method for the suppression of common phase error(CPE)and intercarrier interference(ICI)induced by the phase noise in full-duplex orthogonal frequency division multiplexing(OFDM)systems.First,we regard the effect of CPE as a portion of the SI channel and perform estimation,reconstruction and elimination in the time domain.Then,the ICI signal is estimated and suppressed in the frequency domain.Additionally,by analysing the performance of proposed algorithm,we further develop an iterative mechanism to reduce the parameter estimation error and improve SI cancellation capability.Simulation results show that the proposed method has a significant SI cancellation capability improvement over the traditional SI cancellation schemes.

关键词： full-duplex self-interference phase noise suppression

phase noise modeling in LC oscillators implemented in SiGe technology

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Journal of Semiconductors 2013年第2期34卷 60-66页

作者： M.Bouhouche S.Latreche C.Gontrand Universite Mentouri Faculte des Sciences de l'IngenieurDepartement d'ElectroniqueLaboratoire Hyperfrequence & Semi-conducteur(LHS)25000ConstantineAlegria Universite de Lyon VilleurbanneF-69621France

This paper addresses phase noise analysis of a radiofrequency LC oscillator built around a SiGe heterojunction bipolar transistor （HBT） realized in a 0.35 um BiCMOS process, as an active device. First, we give a brief background to SiGe HBT device physics. The key point is to initiate quantitative analysis on the influence of defects induced during extrinsic base implantation on electric performances of this device. These defects are responsible for the current fluctuations at the origin of low frequency noise in BiCMOS technologies. Next, we investigate the effect of implantation defects as a source of noise in semiconductors on the phase noise of a radiofrequency LC oscillator. We observe their influence on the oscillator phase noise, and we quantify the influence of their energy distribution in the semiconductor gap. Second, we give a behavioral model of an LC oscillator con- taining a SiGe HBT as an active device. The key goal is to study the susceptibility of a radiofrequency oscillator built around a SiGe HBT to phase noise disturbance sources. Based on the time variance behavior of phase noise in oscillators, transient simulations （in the time domain） were used to analyze the time-dependent noise sensitivity of the oscillator.

关键词： SiGe heterojunction radiofrequency mixed-mode simulations oscillator phase noise

phase noise characteristics of narrow-linewidth fiber laser and laser diode in unbalanced interferometers

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Chinese Optics Letters 2013年第2期11卷 55-57页

作者：周会娟陈伟孟洲孙崇峰 College of Opto-electronic Science and Engineering National University of Defense Technology Institute of Information Science and Engineering Henan University of Technology

The phase noises of two narrow-linewidth fiber laser and laser diode are measured by using unbalanced Michelson interferometers with various optical path differences （OPDs）. The measured results indicate that the phase noises of the two lasers do not change linearly with the OPD over the range from 1 to 100 m. The laser diode exhibits phase noise levels higher than that of the fiber laser at OPDs longer than 10 m. However, the laser diode outperforms the fiber laser at OPDs shorter than 10 m. The results obtained can assess laser performance and determine the suitable laser for use in a particular application.

关键词： Michelson interferometers phase noise

phase noise correction for OFDM signal based on DCT approach and variational inference

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The Journal of China Universities of Posts and Telecommunications 2012年第3期19卷 27-32页

作者： CHEN Peng LI Nan LI Ju-hu HE Zhi-qiang WU Wei-ling Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

A novel scheme to joint phase noise （PHN） correcting and channel noise variance estimating for orthogonal frequency division multiplexing （OFDM） signal was proposed, The new scheme was based on the variational Bayes （VB） method and discrete cosine transform （DCT） approximation. Compared with the least squares （LS） based scheme, the proposed scheme could overcome the over-fitting phenomenon and thus lead to an improved performance. Computer simulations showed that the proposed VB based scheme outperforms the existing LS based scheme

关键词： variational Bayes method discrete cosine transform phase noise OFDM

A 9.8-mW 1.2-GHz CMOS frequency synthesizer with a low phase-noise LC-VCO and an I/Q frequency divider

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Journal of Semiconductors 2011年第7期32卷 108-114页

作者：李振荣庄奕琪李兵靳刚 Key Laboratory of the Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian University

A 1.2 GHz frequency synthesizer integrated in a RF receiver for Beidou navigation is implemented in standard 0.18μm CMOS technology.A distributed biased varactor LC voltage-controlled oscillator is employed to achieve low tuning sensitivity and optimized phase noise performance.A high-speed and low-switching-noise divider-by-2 circuit based on a source-coupled logic structure is adopted to generate a quadrature（I/Q） local oscillating signal.A high-speed 8/9 dual-modulus prescaler（DMP）,a programmable-delay phase frequency detector without dead-zone problem,and a programmable-current charge pump are also integrated into the frequency synthesizer. The frequency synthesizer demonstrates an output frequency from 1.05 to 1.30 GHz,and the phase noise is-98.53 dBc/Hz at 100-kHz offset and -121.92 dBc/Hz at 1-MHz offset from the carrier frequency of 1.21 GHz. The power dissipation of the core circuits without the output buffer is 9.8 mW from a 1.8 V power supply.The total area of the receiver is 2.4×1.6 mm^2.

关键词： Beidou receiver frequency synthesizer voltage-controlled oscillator quadrature output divider phase noise

phase noise sensitivity analysis of lattice constellation

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The Journal of China Universities of Posts and Telecommunications 2010年第2期17卷 36-40页

作者： YU Guang-wei NIU Kai HE Zhi-qiang WANG Xu-zhen LIN Jia-ru Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

Based on the assumption of large number of constellation points and high signal-to-noise ratio （SNR）, phase noise sensitivity of lattice constellation is analyzed. The upper bound of symbol error rate （SER） in additive white Gaussian noise （AWGN） channel is derived from pairwise error probability. For small phase noise, phase noise channel is transformed to AWGN channel. With the aid of Wiener model, the obtained upper bound can be extended to phase noise channel. The proposed upper bound can be used as performance criterion to analyze the sensitivity of phase noise in multi-dimensional lattice constellation. Simulation results show that with the same normalized spectral efficiency, higher dimensional lattice constellations are more sensitive than lower ones in phase noise channel. It is also shown that with the same dimension of constellation, larger normalized spectral efficiency means more performance loss in phase noise channel.

关键词： lattice constellation symbol error rate （SER） phase noise

A low-phase-noise digitally controlled crystal oscillator for DVB TV tuners

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Journal of Semiconductors 2010年第7期31卷 85-90页

作者：赵薇卢磊唐长文 State Key Laboratory of ASIC & System Fudan University

This paper presents a 25-MHz fully-integrated digitally controlled crystal oscillator（DCXO） with automatic amplitude control（AAC）.The DCXO is based on Colpitts topology for one-pin solution.The AAC circuit is introduced to optimize the phase noise performance.The automatic frequency control is realized by a 10-bit thermometer-code segmental tapered MOS capacitor array,ensuring a～35 ppm tuning range and～0.04 ppm frequency step.The measured phase noise results are-139 dBc/Hz at 1 kHz and-151 dBc/Hz at 10 kHz frequency offset,respectively.The chip consumes 1 mA at 1.8V supply and occupies 0.4 mm^2 in a 0.18-μm CMOS process.

关键词： crystal oscillator DCXO phase noise supply pushing VCTCXO VCXO

A dual-band frequency synthesizer for CMMB application with low phase noise

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Journal of Semiconductors 2010年第9期31卷 68-73页

作者：于鹏颜峻石寅代伐 Institute of Semiconductors Chinese Academy of Sciences Department of Electrical & Computer Engineering Auburn University

A wide-band frequency synthesizer with low phase noise is presented.The frequency tuning range is from 474 to 858 MHz which is compatible with U-band CMMB application while the S-band frequency is also included. Three VCOs with selectable sub-band are integrated on chip to cover the target frequency range.This PLL is fabricated with 0.35μm SiGe BiCMOS technology.The measured result shows that the RMS phase error is less than 1°and the reference spur is less than -60 dBc.The proposed PLL consumes 20 mA current from a 2.8 V supply.The silicon area occupied without PADs is 1.17 mm;.

关键词： CMMB PLL frequency synthesizer phase noise sigma-delta modulator

phase noise analysis of oscillators with Sylvester representation for periodic time-varying modulus matrix by regular perturbations

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Science in China(Series F) 2007年第4期50卷 587-599页

作者： FAN JianXing YANG HuaZhong WANG Hui YAN XiaoLang HOU ChaoHuan Department of Electronic Engineering Tsinghua University Beijing 100084 China Institute of VLSI Zhejiang University Hangzhou 310027 China Institute of Acoustics Chinese Academy of Sciences Beijing 100080 China

phase noise analysis of an oscillator is implemented with its periodic time-varying small signal state equations by perturbing the autonomous large signal state equations of the oscillator. In this paper, the time domain steady solutions of oscillators are perturbed with traditional regular method; the periodic time-varying Jocobian modulus matrices are decomposed with Sylvester theorem, and on the resulting space spanned by periodic vectors, the conditions under which the oscillator holds periodic steady states with any perturbations are analyzed. In this paper, stochastic calculus is applied to disclose the generation process of phase noise and calculate the phase jitter of the oscillator by injecting a pseudo sinusoidal signal in frequency domain, representing the white noise, and a δcorrelation signal in time domain into the oscillator. Applying the principle of frequency modulation, we learned how the power-law and the Lorentzian spectrums are formed. Their relations and the Lorentzian spectrums of harmonics are also worked out. Based on the periodic Jacobian modulus matrix, the simple algorithms for Floquet exponents and phase noise are constructed, as well as a simple case is demonstrated. The analysis difficulties and the future directions for the phase noise of oscillators are also pointed out at the end.

关键词： phase noise periodic time-varying Sylvester theorem power-law spectrum Lorentzian spectrum Floquet exponent stochastic calculus