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Abstract
With technological advances in the field of communication, the need for reliable high-speed data transfer is increasing. The deployment of large number of wireless sensors for remote monitoring and control and streaming of high definition video, voice and image data, etc. are imposing a challenge to the existing network bandwidth allocation for reliable communication. Two novel schemes for ultra-wide band (UWB) communication technology have been proposed in this paper with the key objective of intensifying the data rate by taking advantage of the orthogonal properties of the modified Hermite pulse (MHP). In the first scheme, a composite pulse is transmitted and in the second scheme, a sequence of multi-order orthogonal pulses is transmitted in the place of a single UWB pulse. The MHP pulses exhibit a mutually orthogonal property between different ordered pulses and due to this property, simultaneous transmission is achieved without collision in the UWB system, resulting in an increase in transmission capacity or improved bit error rate. The proposed schemes for enhanced data rate will offer high volume data monitoring, assessment, and control of wireless devices without overburdening the network bandwidth and pave the way for new platforms for future high-speed wireless sensor applications.
Highlights
In recent times, ultra-wide band (UWB) communication technology has become widely used in wireless sensing applications such as structural health monitoring, patient health care monitoring, military surveillance, and smart homes, etc
Instead of transmitting the individual orthogonal pulses and modulating in the pulse polarity, position, and phase, this paper proposes the transmission of the composite pulse and modulation of the information in pulse shape
Two novel schemes for data rate enhancement in UWB communication technology have been presented through the course of this paper
Summary
Ultra-wide band (UWB) communication technology has become widely used in wireless sensing applications such as structural health monitoring, patient health care monitoring, military surveillance, and smart homes, etc. Different kinds of modulation schemes have already been proposed for obtaining improved data rates, which in general make use of pulse-position modulation (PPM) in addition to the employment of time-hopping sequences. In this paper a novel M-ary pulse shape modulation (PSM) scheme for UWB communication technology has been proposed in order to enhance the data rate by exploiting the orthogonal properties of the MHP and increase the number of simultaneous data transmissions. The proposed work shows our previously reported orthogonal modified Hermite polynomial (MHP) pulse-based high data density wireless communication. In a single-channel UWB system, the data rate has been improved by n-folds for n-number of MHP orthogonal pulses in a single time slot. For instance 16 distinct composite pulses can be represented through the employment of 4 MHP orthogonal pulses, resulting in a data rate enhancement of 4 folds in a single channel.
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