Marco Guainazzo

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The use of time-frequency distributions is proposed as a nonlinear signal processing technique that is combined with a pattern recognition approach to identify superimposed transmission modes in a reconfigurable wireless terminal based on softwaredefined radio techniques. In particular, a software-defined radio receiver is described aiming at the(More)
This paper presents a location determination technique which is based on wireless local area networks(WLANs), in particular the IEEE 802.11b standard, in conjunction with GPS(Global positioning system). Since each of the positioning device has it's shortcomings, this paper proposes to use the data obtained from the GPS system together with the WLANs(More)
This paper describes a Positioning algorithm that uses the signal strength, received by a Wireless Local Area Network, to determine users position. The system improves positioning accuracy by mitigating the multi-path and noise, through an empirical analysis of environment and a pre-post curser mitigator. Results, in terms of relative error, are presented(More)
In this work, a mode identification system for superimposed signals in the same band is presented. More precisely, a pattern recognition approach, based on Wigner Distribution for features extraction and non parametric classifiers (kNearest Neighbors and Parzen) is proposed for identifying the transmission modes in an indoor wireless environment. A(More)
Modulation/mode identification is an interesting topic in wireless communications. The general main problem is the recognition of the transmission mode employed in a radio environment. In this work the problem of modulation/mode recognition is exploited in the context of Smart Space (SS) applications for a distributed wireless sensor network where the(More)
A preliminary study is presented on a Software Defined Radio (SDR) receiver with the capability of receiving both the position information and the cellular services. In these last years, a great attention in wireless communication is devoted at integrating different standards into the same device in order to make a reconfigurable wireless terminal. In(More)
A basic step in the asynchronous DS/CDMA reception consists in the effective acquisition of the initial pseudonoise (PN) synchronism. This is especially true in the case of multi-user DS/CDMA systems, dominated by multi-user interference (MUI), as it often happens in multimedia satellite networks, generally characterised by asynchronous transmission. In(More)
The use of Time Frequency (TF) analysis is proposed as signal processing technique combined with a pattern recognition approach, for identifying the transmission modes in indoor wireless environment with a reconfigurable mobile terminal based on Software Radio techniques. In particular, a Software Radio device is considered aiming at the identification of(More)
One of the most critical problem in the asynchronous DS/CDMA reception consists of the effective acquisition of the initial pseudo-noise (PN) synchronism. In particular the multi-user interference (MUI) contrasts the operation to synchronise correctly the system. In this paper1, an adaptive PN acquisition scheme based on a statistical hypothesis testing and(More)
A carrier offset correction scheme based on Maximum Likelihood (ML) method for the downlink of an Orthogonal Variable bit rate Multicarrier-CDMA (MCCDMA) scheme in a fast frequency selective Rayleigh fading channel is proposed and discussed. The proposed methodology assumes perfect knowledge of phase offset, whereas an Equal Gain Combining (EGC) scheme is(More)