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Pilot\u2010based schemes are commonly employed to recover channel information and implement efficient channel equalisation. From the symbols transmitted over the pilot carriers, the channel coefficients for a whole OFDM are estimated. In this paper, we propose a method to compute in a closed form the mean square estimation error of different linear approximation and interpolation algorithms in the time\u2010frequency domain. Specifically, by exploiting the linear relationship between the estimated channel coefficients for the whole frame and those relative to the pilots, the proposed approach permits to obtain the mean square error relative to all OFDM symbols in a frame. The method can be used for any linear frequency\/time interpolation\/approximation method and for any choice of pilot positions and channel statistics. Thanks to our derivations, several pilot\u2010aided channel estimation and interpolation algorithms can be compared without resorting to burdensome computer simulations. In order to demonstrate the effectiveness of the method, the downlink of the long term evolution system is taken as a case study: some popular channel estimators have been selected and the best strategy in a realistic wireless scenario is investigated. The performance of the method is also verified by computing, by means of simulations, bit error rate (BER) curves for the long term evolution (LTE) multiple input multiple output (MIMO) downlink, using 2\u2009\u00d7\u20092 and 4\u2009\u00d7\u20094 Alamouti space\u2010frequency coding configurations, in both uncoded and coded communications. Copyright \u00a9 2014 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/ett.2840","type":"journal-article","created":{"date-parts":[[2014,5,16]],"date-time":"2014-05-16T03:30:18Z","timestamp":1400211018000},"page":"704-717","source":"Crossref","is-referenced-by-count":9,"title":["Time\u2010frequency MSE analysis of linear channel estimation methods for the LTE downlink"],"prefix":"10.1002","volume":"26","author":[{"given":"Fabrizio","family":"Argenti","sequence":"first","affiliation":[{"name":"Department of Information Engineering University of Florence via di Santa Marta, 3, I\u201050139 Florence Italy"}]},{"given":"Massimiliano","family":"Biagini","sequence":"additional","affiliation":[{"name":"Department of Information Engineering University of Florence via di Santa Marta, 3, I\u201050139 Florence Italy"}]},{"given":"Enrico","family":"Del Re","sequence":"additional","affiliation":[{"name":"Department of Information Engineering University of Florence via di Santa Marta, 3, I\u201050139 Florence Italy"}]},{"given":"Simone","family":"Morosi","sequence":"additional","affiliation":[{"name":"Department of Information Engineering University of Florence via di Santa Marta, 3, I\u201050139 Florence Italy"}]}],"member":"311","published-online":{"date-parts":[[2014,5,15]]},"reference":[{"volume-title":"Wimax Technology and Network Evolution","year":"2011","author":"Kamran Etemad M\u2010YL","key":"e_1_2_12_2_1"},{"volume-title":"3G Evolution HSPA and LTEfor Mobile Broadband","year":"2008","author":"Dahlman E","key":"e_1_2_12_3_1"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2011.5706315"},{"key":"e_1_2_12_5_1","doi-asserted-by":"crossref","unstructured":"LiY CiminiLJJr SollenbergerNR.Robust channel estimation for ofdm systems with rapid dispersive fading channels. 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