000149748 001__ 149748 000149748 005__ 20250129140941.0 000149748 0247_ $$2doi$$a10.1109/TBC.2009.2033403 000149748 0248_ $$2sideral$$a65810 000149748 037__ $$aART-2009-65810 000149748 041__ $$aeng 000149748 100__ $$0(orcid)0000-0001-9052-9554$$aOrtín, J. 000149748 245__ $$aChannel Independent Precoder for OFDM-Based Systems Over Fading Channels 000149748 260__ $$c2009 000149748 5060_ $$aAccess copy available to the general public$$fUnrestricted 000149748 5203_ $$aIn this paper we propose an independent channel precoder for orthogonal frequency division multiplexing (OFDM) systems over fading channels. The design of the precoder is based on the information redistribution of the input modulated symbols among the output precoded symbols. The proposed precoder decreases the variance of the instantaneous noise power at the receiver produced by the channel variability. The employment of an interleaver together with a precoding matrix whose size does not depend on the number of data carriers in an OFDM symbol allows different configurations of time-frequency diversity which can be easily adapted to the channel conditions. The precoder is evaluated with a modified Zero Forcing (ZF) equalizer whose maximum gain is constrained by means of a clipping factor. Thus, the clipping factor limits the noise power transfer in the receiver deprecoding block in low SNR conditions. 000149748 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000149748 590__ $$a2.242$$b2009 000149748 591__ $$aTELECOMMUNICATIONS$$b7 / 74 = 0.095$$c2009$$dQ1$$eT1 000149748 591__ $$aENGINEERING, ELECTRICAL & ELECTRONIC$$b33 / 244 = 0.135$$c2009$$dQ1$$eT1 000149748 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000149748 700__ $$0(orcid)0000-0002-7452-446X$$aGarcia,P.$$uUniversidad de Zaragoza 000149748 700__ $$0(orcid)0000-0001-5293-6132$$aGutiérrez,F.$$uUniversidad de Zaragoza 000149748 700__ $$0(orcid)0000-0003-2664-6339$$aValdovinos,A.$$uUniversidad de Zaragoza 000149748 7102_ $$15008$$2800$$aUniversidad de Zaragoza$$bDpto. Ingeniería Electrón.Com.$$cÁrea Teoría Señal y Comunicac. 000149748 7102_ $$15008$$2560$$aUniversidad de Zaragoza$$bDpto. Ingeniería Electrón.Com.$$cÁrea Ingeniería Telemática 000149748 773__ $$g55, 4 (2009), 818-825$$pIEEE trans. broadcast.$$tIEEE TRANSACTIONS ON BROADCASTING$$x0018-9316 000149748 8564_ $$s170726$$uhttps://zaguan.unizar.es/record/149748/files/texto_completo.pdf$$yVersión publicada 000149748 8564_ $$s3400157$$uhttps://zaguan.unizar.es/record/149748/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000149748 909CO $$ooai:zaguan.unizar.es:149748$$particulos$$pdriver 000149748 951__ $$a2025-01-29-14:09:07 000149748 980__ $$aARTICLE