{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:23:46Z","timestamp":1760243026041,"version":"build-2065373602"},"reference-count":33,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2015,8,27]],"date-time":"2015-08-27T00:00:00Z","timestamp":1440633600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the Natural Science Foundation of China under Grant","award":["51474015"],"award-info":[{"award-number":["51474015"]}]},{"name":"the National Science &amp; Technology Pillar Program","award":["2013BAK06B03"],"award-info":[{"award-number":["2013BAK06B03"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, a wireless sensor network (WSN) technology adapted to underground channel conditions is developed, which has important theoretical and practical value for safety monitoring in underground coal mines. According to the characteristics that the space, time and frequency resources of underground tunnel are open, it is proposed to constitute wireless sensor nodes based on multicarrier code division multiple access (MC-CDMA) to make full use of these resources. To improve the wireless transmission performance of source sensor nodes, it is also proposed to utilize cooperative sensors with good channel conditions from the sink node to assist source sensors with poor channel conditions. Moreover, the total power of the source sensor and its cooperative sensors is allocated on the basis of their channel conditions to increase the energy efficiency of the WSN. To solve the problem that multiple access interference (MAI) arises when multiple source sensors transmit monitoring information simultaneously, a kind of multi-sensor detection (MSD) algorithm with particle swarm optimization (PSO), namely D-PSO, is proposed for the time-frequency coded cooperative MC-CDMA WSN. Simulation results show that the average bit error rate (BER) performance of the proposed WSN in an underground coal mine is improved significantly by using wireless sensor nodes based on MC-CDMA, adopting time-frequency coded cooperative transmission and D-PSO algorithm with particle swarm optimization.<\/jats:p>","DOI":"10.3390\/s150921134","type":"journal-article","created":{"date-parts":[[2015,8,27]],"date-time":"2015-08-27T10:03:37Z","timestamp":1440669817000},"page":"21134-21152","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Multi-Sensor Detection with Particle Swarm Optimization  for Time-Frequency Coded Cooperative WSNs Based on  MC-CDMA for Underground Coal Mines"],"prefix":"10.3390","volume":"15","author":[{"given":"Jingjing","family":"Xu","sequence":"first","affiliation":[{"name":"School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Linyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Acoustics, Academia Sinica, Beijing 100080, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ruisong","family":"Han","sequence":"additional","affiliation":[{"name":"School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaotao","family":"Shao","sequence":"additional","affiliation":[{"name":"School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2015,8,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"13149","DOI":"10.3390\/s140713149","article-title":"An Integrated Environment Monitoring System for Underground Coal Mines\u2014Wireless Sensor Network Subsystem with Multi-Parameter Monitoring","volume":"14","author":"Zhang","year":"2014","journal-title":"Sensors"},{"key":"ref_2","first-page":"1536","article-title":"An Experiment Study of the Propagation of Radio Waves in a Scaled Model of Long-Wall Coal Mining Tunnels","volume":"8","author":"Han","year":"2009","journal-title":"IEEE Antennas Wirel. 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