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Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Design of pulse waveform for waveform division multiple access UWB wireless communication system.

Zhendong Yin¹, Zhirui Wang¹, Xiaohui Liu¹

¹School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China.

Thescientificworldjournal

|March 28, 2014

Summary

A novel Waveform Division Multiple Access (WDMA) scheme uses orthogonal wavelet functions for efficient communication. This method significantly reduces multiple access interference, achieving near single-user performance in both synchronous and asynchronous systems.

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Area of Science:

Signal Processing
Telecommunications Engineering
Applied Mathematics

Background:

Existing multiple access schemes face challenges with interference and efficiency.
Wavelet functions offer unique correlation properties suitable for communication systems.

Purpose of the Study:

To introduce and evaluate a new multiple access scheme, Waveform Division Multiple Access (WDMA).
To leverage orthogonal wavelet functions for enhanced communication system performance.

Main Methods:

Investigated correlation properties of various single wavelet functions.
Developed combined orthogonal waveforms for user assignment in WDMA.
Conducted simulations to assess system performance.

Main Results:

Combined orthogonal waveforms demonstrated superior suitability over single wavelet functions for WDMA.
Near single-user bit error rate (BER) achieved in synchronous systems due to minimized multiple access interference (MAI).
Satisfactory performance observed in asynchronous systems without multiuser detection using a specific combination mode.

Conclusions:

WDMA based on orthogonal wavelet functions is a promising multiple access technique.
The proposed scheme effectively mitigates MAI, improving communication reliability.
The use of combined waveforms offers significant advantages in both synchronous and asynchronous WDMA systems.