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| 1 | Data-aided Frequency Estimation for Burst Digital Transmission显示文摘 | Mengali Umberto Morelli M | | 0，，01： | 2 |
| 2 | Optimal circle-to-rectilinear orbit transfer with circumferential thrust显示文摘This paper investigates the optimal transfer trajectories from a circular parking orbit towards the apocenter of a rectilinear ellipse,where the spacecraft reaches a quasi-stationary condition relative to an inertial reference frame.The spacecraft is equipped with a propulsion system that provides a circumferential continuous propulsive acceleration,that is,an acceleration whose direction is perpendicular to the primary body-spacecraft line.The performance index to minimize is the total flight time,and an indirect method is used to analyze the transfer trajectories.In this context,the optimal transfer performance is obtained as a function of the spacecraft propulsive acceleration magnitude through an interpolation procedure of numerical simulations.The results obtained with a continuous thrust propulsion system are also compared with those derived from a multi-impulse transfer.Finally,the paper investigates a heliocentric mission scenario in which the spacecraft minimizes the flight time required to reach a rectilinear ellipse with a given value of the aphelion radius. | Alessandro A.Quarta Giovanni Mengali Andrea Caruso | 2019 | Astrodynamics2019，3，1： | 2 |
| 3 | Smart dust option for geomagnetic tail exploration显示文摘In-situ measurements are necessary for a long-term analysis of the spatial structure of the geomagnetic tail.This type of mission requires the use of a propellantless propulsion system,such as a classical solar sail,to continuously rotate the design orbit apse line such that it remains parallel to the Sun-Earth direction.To reduce the mission costs,this paper suggests the employment of Sun-pointing smart dusts,which are here investigated in terms of propulsive acceleration level necessary to guarantee a mission’s feasibility.A Sun-pointing smart dust can be thought of as a millimeter-scale solar sail,whose geometric configuration allows it to passively maintain an alignment with the Sun-spacecraft line.The smart dust external surface is coated with an electrochromic reflective film in such a way that it may change,within some limits,its propulsive acceleration magnitude.A suitable control law is necessary for the smart dust to enable an artificial precession of its Earth-centred orbit,similar to what happens in the GeoSail mission.This paper analyzes the required control law using an optimal approach.In particular,the proposed mathematical model provides a set of approximate equations that allow a simple and effective tradeoff analysis between the propulsive requirements,in terms of the smart dust acceleration,and the characteristics of the design orbit. | Alessandro A.Quarta Giovanni Mengali Lorenzo Niccolai | 2019 | Astrodynamics2019，3，3： | 2 |
| 4 | TheModi- fled Cramer-Rao Bound and Its Application to Synchro- nization Problems 显示文摘 | D'Andrea A N D Mengali U Reggiannini R | 1994 | Communications IEEE Transac- tions on1994，42，234： | 1 |
| 5 | Decomposition of M-ray CPM signals into PAM waveforms显示文摘 | Mengali U Morelli M | 1995 | IEEE Trans Information Theory1995，41，： | 1 |
| 6 | An Improved Frequency Offset Estimator for OFDM Applications 显示文摘 | Morelli M Mengali U | 1999 | IEEE Transactions on Communications1999，3，3： | 1 |
| 7 | Decomposition of M-ary CPM Signals into PAM Waveforms 显示文摘 | MENGALI U MORELLI M | 1995 | IEEE Transac- tions on Information Theory1995，41，05： | 1 |
| 8 | An improved frequency offset estimator for OFDM applications显示文摘 | Morelli M Mengali U | 1999 | Communications Letters IEEE1999，3，3： | 1 |
| 9 | Feedforward joint phase and timing estimation with OQPSK modulation 显示文摘 | D'Amico A A D'Andrea A N and Mengali U | 1999 | IEEE Transactions on Vehicular Technology1999，48，3： | 1 |
| 10 | An improved frequency offset esti- mator for OFDM applications显示文摘 | Morelli M Mengali U | 1999 | IEEE Communications Letters1999，3，3： | 1 |
| 11 | Joint Frequency and Timing Recovery for MSK- Type Modulation 显示文摘 | M Morelli U Mengali | 1998 | IEEE Communications Letters1998，47，6： | 1 |
| 12 | Escape from elliptic orbit using constant radial thrust 显示文摘 | Mengali G Quarta A | 2009 | Journal of Guidance Control and Dynamics2009，32，3： | 1 |
| 13 | Dynamics and control of different aircraft formation structures显示文摘 | Fabrizio Giulietti Giovanni Mengali | 2004 | Aeronautical J2004，108，1081： | 1 |
| 14 | Channel Estimation for Ultra-Wideband Communications显示文摘 | Lottici V Andrea A Mengali U | 2002 | IEEE Journal on Selected Areas in Communications2002，20，9： | 1 |
| 15 | A comparison of pilotaided channel estimation methods for OFDM systems 显示文摘 | Morelli M Mengali U | 2001 | IEEE Transactions on Signal Process2001，49，12： | 1 |
| 16 | Channel estimation for adaptive frequency-domain equalization 显示文摘 | Morelli M Sanguinetti L and Mengali U | 2005 | IEEE Transactions on Wireless Communications2005，4，11： | 1 |
| 17 | An improved frequency offset estimator for OFDM显示文摘 | MORELLI M MENGALI U | 1999 | IEEE Commun Lett1999，3，3： | 1 |
| 18 | Dynamics andcontrol of dif- ferent aircraft formation structures显示文摘 | Fabrizio Giulietti Giovanni Mengali | 2004 | Aeronautical J2004，108，1081： | 1 |
| 19 | A Comparison of Pilct-aided Channel Estimation Methods for OFDM Systems 显示文摘 | MORELLI M MENGALI U | 2001 | IEEE Trans on Signal Processing2001，49，12： | 1 |
| 20 | An improved frequency offset estimation for OFDM applications显示文摘 | Morelli M Mengali U | 1999 | IEEE Commun Lett1999，3，3： | 1 |
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