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dc.contributor.authorWu, Wen-Rongen_US
dc.contributor.authorLee, Chun-Fangen_US
dc.date.accessioned2014-12-08T15:07:06Z-
dc.date.available2014-12-08T15:07:06Z-
dc.date.issued2010-04-01en_US
dc.identifier.issn0253-3839en_US
dc.identifier.urihttp://hdl.handle.net/11536/5566-
dc.description.abstractIn an orthogonal frequency division multiplexing (OFDM) system, it is known that when the delay spread of the channel is larger than the cyclic prefix (CP) size, intersymbol interference will occur. The time-domain equalizer (TEQ), designed to shorten the channel impulse response (CIR), is a common device to solve this problem. Conventionally, the TEQ is treated as a finite-impulse-response (FIR) filter, and many TEQ design methods have been proposed. However, a wireless channel typically has multi-path responses, exhibiting FIR characteristics. Thus, the corresponding TEQ will have an infinite impulse response (IIR), and the FIR modeling of the TEQ is inefficient, i.e., the required order for the TEQ will be high. The conventional approach will then suffer from the high computation complexity problem, both in the derivation of TEQ and in the operation of channel shortening. In this paper, we propose a new scheme to overcome these problems. In the derivation of the TEQ, we propose to use a multistage structure, replacing a high-order TEQ with a cascade of several low-order TEQs. In the shortening operation, we propose to use an IIR TEQ approximating a high-order FIR TEQ. Since the ideal TEQ exhibits low-order IIR characteristics, the order of the IIR TEQ can be much lower than the FIR TEQ. Simulations show that while the proposed method can reduce computational complexity significantly, its performance is almost as good as existing methods.en_US
dc.language.isoen_USen_US
dc.subjectorthogonal frequency division multiplexingen_US
dc.subjecttime domain equalizeren_US
dc.subjectinfinite impulse responseen_US
dc.subjectsteiglitz-McBride methoden_US
dc.titleA MULTI-STAGE IIR TIME DOMAIN EQUALIZER FOR OFDM SYSTEMS WITH ISIen_US
dc.typeArticleen_US
dc.identifier.journalJOURNAL OF THE CHINESE INSTITUTE OF ENGINEERSen_US
dc.citation.volume33en_US
dc.citation.issue3en_US
dc.citation.spage475en_US
dc.citation.epage487en_US
dc.contributor.department電信工程研究所zh_TW
dc.contributor.departmentInstitute of Communications Engineeringen_US
dc.identifier.wosnumberWOS:000277707000015-
dc.citation.woscount0-
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