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Qi-Yue Yu

Publications and source records attributed to Qi-Yue Yu.

2 recordsLinked to original sources
arXiv2021

Non-Binary Polar Coded System for the Two-User Multiple-Access Channel

This paper presents non-binary polar codes for the two-user multiple-access channel (MAC). The bit error rate (BER) performances of the non-binary polar codes with different kernel factors have been investigated in detail to select a proper parameter from GF(q) for the generator matrix. Furthermore, the successive cancellation decoding for the non-binary polar codes in the two-user MAC is introduced in detail. Simulation results show that the choice of the kernel factors has a significant impact on the block error rate (BLER) performance; moreover, the non-binary polar codes provide a better BLER performance than their binary counterpart in the two-user MAC.

cs.IT↗
arXiv2021

Uniquely Decodable Multi-Amplitude Sequence for Grant-Free Multiple-Access Adder Channels

Grant-free multiple-access (GFMA) is a valuable research topic, since it can support multiuser transmission with low latency. This paper constructs novel uniquely-decodable multi-amplitude sequence (UDAS) sets for GFMA systems, which can provide high spectrum efficiency (SE) with low-complexity active user detection (AUD) algorithm. First of all, we propose an UDAS-based multi-dimensional bit interleaving coded modulation (MD-BICM) transmitter; then introduce the definition of UDAS and construct two kinds of UDAS sets based on cyclic and quasi-cyclic matrix modes. Besides, we present a statistic of UDAS feature based AUD algorithm (SoF-AUD), and a joint multiuser detection and improved message passing algorithm for the proposed system. Finally, the active user error rate (AUER) and Shannon limits of the proposed system are deduced in details. Simulation results show that our proposed system can simultaneously support four users without additional redundancy, and the AUER can reach an extremely low value $10^{-5}$ when $E_b/N_0$ is $0$ dB and the length of transmit block is larger than a given value, i.e., 784, verifying the validity and flexibility of the proposed UDAS sets.

cs.IT↗