Short Frame Transmission at Very Low SNR by Associating CCSK Modulation With NB-Code

In this paper, we present a frame structure that can be viewed as preamble for the detection and synchronization process (leading to low cost receiver) an encoded codeword carrying transmitted message reliable transmission). This duality facilitates ALOHA protocol avoiding overhead. The structure, named Quasi-Cyclic Short Packet (QCSP), is based on association of Cyclic Code Shift Keying (CCSK) modulation non-binary error control code. detection/correction algorithm QCSP system presented, its performance theoretically derived discussed different parameters. A received correctly with probability $\mathbf {10^{-4}}$ , distanced by 1.2 dB from Polyanskiy’s bound (an estimated Shannon’s limit small packet size) at ?11 SNR payload 360 bits. Compared classical preamble-based using modern binary code, size reduced 23%. Moreover, detecting requires lower complexity than longer preamble.