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Under these circumstances, noncoherent multiple-input multiple-output (MIMO) has received attention in recent years, since it is less influenced by factors such as phase fluctuations and has fewer requirements for channel estimation and synchronization. Spatial multiplexing MIMO-MFSK based on energy detection is different from conventional noncoherent MIMO in that it can achieve higher spatial multiplexing gain in the independent distribution of channel fading statistics. At the receiver, partial real channel state information (CSI) is available, which can improve the capacity while ensuring the reliability of the link. With partial real CSI replacing instantaneous CSI, the system performance is inferior to conventional coherent MIMO under the influence of noise. As a result, it is necessary to analyze its theoretical detection performance. By energy detection, the noise of the MIMO-MFSK system conforms to the generalized gamma distribution. On the basis of this distribution, the optimal decision rule of the system and the symbol error rate\u00a0(SER) formula are derived. Additionally, we investigate the signal-dependent noise problem of minimum Euclidean distance detection. Numerical results show that the SER formula fits well with the simulation results under the condition of a high signal-to-noise ratio.<\/jats:p>","DOI":"10.1186\/s13638-022-02116-4","type":"journal-article","created":{"date-parts":[[2022,4,4]],"date-time":"2022-04-04T13:03:52Z","timestamp":1649077432000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Performance analysis of spatial multiplexing MIMO-MFSK based on energy detection for fast-fading environments"],"prefix":"10.1186","volume":"2022","author":[{"given":"Shuaijun","family":"Li","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongbing","family":"Qiu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2918-6067","authenticated-orcid":false,"given":"Lin","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chao","family":"Yang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2022,4,4]]},"reference":[{"issue":"1","key":"2116_CR1","doi-asserted-by":"publisher","first-page":"80","DOI":"10.1109\/MVT.2018.2866306","volume":"14","author":"RH Gohary","year":"2019","unstructured":"RH Gohary H Yanikomeroglu 2019 Noncoherent MIMO signaling for block-fading channels: approaches and challenges IEEE Veh. 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