Quasi Cyclic Short Packet

This talk introduces a novel coded modulation scheme called Quasi-Cyclic Short Packet (QCSP) for low-power wide-area applications. Similar to the LoRa Wide Area Network, QCSP frames can be efficiently employed within an unslotted Aloha protocol. The QCSP scheme combines non-binary (NB) error-correcting codes with Cyclic Code Shift Keying (CCSK) modulation. A key advantage of QCSP frames is their ability to eliminate the need for a preamble for detection and synchronization, enabling efficient transmission of short packets even under low signal-to-noise ratio conditions. Real-time experiments have been conducted over mobile and maritime channels, and QCSP frames have also been tested in the context of Low Earth Orbit (LEO) satellite communications. To conclude, the talk highlights the differences and similarities between LoRa frames and QCSP frames, as well as ongoing research projects on this topic.