103 citations · 122 across the 9 of their papers we have counts for
4 papers · 1 filter
Dual-Mode Time Domain Multiplexed Chirp Spread Spectrum
Ali Waqar Azim, Ahmad Bazzi, Mahrukh Fatima +2
We propose a dual-mode (DM) time domain multiplexed (TDM) chirp spread spectrum (CSS) modulation for spectral and energy-efficient low-power wide-area networks (LPWANs). DM-CSS mod…
Chirp Spread Spectrum-based Waveform Design and Detection Mechanisms for LPWAN-based IoT -- A Survey
Ali Waqar Azim, Ahmad Bazzi, Raed Shubair +1
LoRa is a widely adopted method of utilizing chirp spread spectrum (CSS) techniques at the physical (PHY) layer to facilitate low-power wide-area network (LPWAN) connectivity. By t…
A Framework for Amalgamating Optical-OFDM and Optical-OFDM with Index Modulation for Optical Wireless Systems
Ali Waqar Azim, Yannis Le Guennec, Marwa Chafii +1
In this communication, we propose a framework for amalgamating optical-orthogonal frequency-division multiplexing (O-OFDM) and O-OFDM with index modulation (O-OFDM-IM) for optical…
Dual-Mode Chirp Spread Spectrum Modulation
Ali Waqar Azim, Ahmad Bazzi, Raed Shubair +1
In this letter, we propose dual-mode chirp spread spectrum (DM-CSS) modulation for low-power wide-area networks. DM-CSS is capable of achieving a higher spectral efficiency (SE) re…