LoRa (Long Range) is a widely adopted Internet-of-Things (IoT) technique, but its fatal limit low data rate. In this letter, we propose new index modulation for to increase the rate, in which multiple quasi-orthogonal chirps modulated under different spreading factors (SFs) are concurrently transmitted, thereby leveraging SF domain as means carry more information. Both coherent and non-coherent...

The long range wide area network (LoRaWAN) is one of the enabling technologies for low power (LPWA) networks. In LoRaWAN, a node transmits its packet to gateway (GW) in an autonomous and decentralized manner. quantity data that can be transmitted by each limited duty cycle (DC). Furthermore, it not easy nodes perform sophisticated techniques increasing due their functionality, especially when a...

This paper studies a novel Radar and wireless communication fusion system namely, RadCom, using orthogonal frequency division multiplexing index modulation waveforms. From the perspective, information is conveyed not only through modulated subcarriers but also by active subcarrier indices that are dynamically updated at transmitted symbol rates. When compared with conventional systems, subset o...

In this paper, we apply polar codes to a modified version of OFDM systems with index modulation which is called in-phase/quadrature (OFDM-I/Q-IM). We provide general design guidelines for the proposed polar-coded OFDM-I/Q-IM systems. system, at transmitter, employ random frozen bits appending scheme not only makes code compatible but also improves bit error rate (BER) performance system. Furthe...