The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper proposes a Doppler resilient modulation approach that can be used in acoustic local positioning systems with Binary Phase-Shift Keying (BPSK) modulated signals for Time-of-Flight (ToF) estimation. The proposed approach is implemented in the receiver and can be performed in parallel with other classic techniques to improve the position estimation process. The technique is based on Differential...
This paper proposes an algorithm to design band-limited Orthogonal Frequency Division Multiplexing (OFDM) pulses for accurate time-of-flight ranging in acoustic-based localization systems. The proposed algorithm is capable to generate OFDM pulses with higher energy when compared with other common pulse design approaches with similar characteristics. The results attained have shown that it is possible...
In this work the Near-Far problem is characterized in the context of an acoustic local positioning system (ALPS). First, a simple energy normalization algorithm is presented to identify the Near-Far situation and also to resolve the signal detection in the case of non-overlapping receptions. Then, an improved signal interference cancellation (ISIC) algorithm is proposed to remove from the received...
In this paper, we propose a design for the analog part of an Hybrid Filter Bank (HFB) system targeted to radio-frequency (RF) signals, inspired on the mammals cochlea, with the basilar membrane mimicked by microstrip lines. A prototype is presented, operating from 840 MHz to 1470 MHz using ADCs working at 210 Msps. Simulation results revealed that it is possible to design a HFB with low values of...
In this paper we propose an analog to digital converter system for RF signals, the Cochlear Radio, which is bio-inspired in the ear of mammals (cochlea). The basilar membrane is mimicked by microstrip lines and the hair cells by mid-end ADCs. The proposed system relies on hybrid filter bank to perform the conversion of the analog input signal into a digital version of it. A prototype of the analog...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.