Compressed spectrum sensing for grant-free NOMA based internet of vehicles

EURASIP Journal on Advances in Signal Processing

Zengqi Li¹  Liang Zhang²  Min Jia² 

[1] Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, China;School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, China;

关键词: IoV;    MMTC;    Non-orthogonal multiple access (NOMA);    Compressed sensing;    Block-sparsity;   

DOI  :  10.1186/s13634-022-00835-w

来源: Springer

【 摘 要 】

With the development of communication technology, non-orthogonal multiple access (NOMA) technology is proposed to meet the requirements of high throughput and low latency in massive machine type communication (mMTC) of Internet of Vehicles (IoV). In grant-free NOMA based IoV, mMTC has the characteristics of sparse active users at the same time, which makes the detection and recovery of user information critical. In this paper, considering the sparsity of active users in mMTC, we present a new block sparsity method under compressed sensing model that enables us to detect activity of users and recover user information with high accuracy and low complexity. The recovered algorithm used in our study is known as block sparse ISD algorithm, which exploits block sparse structure based on the ISD algorithm. The simulation results show that the proposed method is able to realize more performance gains in sparse signal recovery than traditional algorithm.

【 授权许可】

CC BY