{"title":"Performance Analysis for Optimal Pilot Spacing in MIMO-OFDM Systems","authors":"Sanggeun Lee;Chungyong Lee;Dongkyu Sim","doi":"10.1109/TVT.2024.3520949","DOIUrl":null,"url":null,"abstract":"This paper investigates pilot symbol-assisted channel estimation in multiple-input multiple-output orthogonal frequency division multiplexing systems. Especially, under multipath fading channels, we perform the analysis for optimal pilot spacing that maximizes the effective data rate which represents the number of correctly detected data per unit time. To do this, we first find the statistical properties of the estimated effective channel including interpolation error. After that, utilizing the statistical properties of the estimated effective channel, the average bit error probability and the effective data rate according to the pilot spacing are derived. Furthermore, based on the derived results, we obtain the average optimal pilot spacing to maximize the effective data rate of the systems. In simulation results, we verify analysis for the average bit error probability and effective data rate by comparing analytical and simulation results according to the frequency selectivity of the channel models. The existence of optimal pilot spacing which compromises the average bit error probability and data rate is also confirmed by the analytical results of the effective data rate. Finally, we discuss the relationship between the frequency selectivity of the channels and optimal pilot spacing, and the effectiveness of utilizing average optimal pilot spacing in practical channel models. Simulation results show that, regardless of the frequency selectivity of the channels, the average optimal spacing can achieve at least 93% of maximum effective data rate performance except for the case of the bottom 5%.","PeriodicalId":13421,"journal":{"name":"IEEE Transactions on Vehicular Technology","volume":"74 4","pages":"6270-6283"},"PeriodicalIF":7.1000,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Vehicular Technology","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10812044/","RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
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Abstract
This paper investigates pilot symbol-assisted channel estimation in multiple-input multiple-output orthogonal frequency division multiplexing systems. Especially, under multipath fading channels, we perform the analysis for optimal pilot spacing that maximizes the effective data rate which represents the number of correctly detected data per unit time. To do this, we first find the statistical properties of the estimated effective channel including interpolation error. After that, utilizing the statistical properties of the estimated effective channel, the average bit error probability and the effective data rate according to the pilot spacing are derived. Furthermore, based on the derived results, we obtain the average optimal pilot spacing to maximize the effective data rate of the systems. In simulation results, we verify analysis for the average bit error probability and effective data rate by comparing analytical and simulation results according to the frequency selectivity of the channel models. The existence of optimal pilot spacing which compromises the average bit error probability and data rate is also confirmed by the analytical results of the effective data rate. Finally, we discuss the relationship between the frequency selectivity of the channels and optimal pilot spacing, and the effectiveness of utilizing average optimal pilot spacing in practical channel models. Simulation results show that, regardless of the frequency selectivity of the channels, the average optimal spacing can achieve at least 93% of maximum effective data rate performance except for the case of the bottom 5%.
期刊介绍：
The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.
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