Editorial: Hans Dieter Lüke turns 65

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<ul><li><p>Signal Processing 80 (2000) 2265}2266</p><p>EditorialHans Dieter LuK ke turns 65</p><p>A top event took place at Aachen University ofTechnology (RWTH) in April this year: the 65thbirthday of Hans Dieter LuK ke, professor anddirector of the Institute for CommunicationsEngineering (IENT), coincided with the 50thanniversary of the foundation of IENT.</p><p>H.D. LuK ke took over as director of IENT fromhis venerated academic teacher and founder of theIENT, Volker Ascho!, in 1972. A look at IENTsannals, however, reveals, that H.D. LuK kes relationswith the IENT go back a much longer time: asa student of electrical engineering, he "rst came intocontact with the IENT in 1958. Later, from 1960 to1966, he worked at the IENT toward his Doctoral</p><p>degree with V. Ascho!, graduating with a thesis onthe synthesis of orthogonal signal alphabets. Itmust have been during this time that he discoveredhis fascination for signals and sequences with goodcorrelation properties, which has not left him to thepresent day.</p><p>After this sojourn at the IENT, he went to workwith industrial research labs in Ulm and Paris.Luckily, as he reported back to his colleagues at theIENT, his work on multiple access communicationand radar systems allowed him to remain faithful tothe orthogonal sequences he had grown so familiarwith. It is, hence, only logical that, after beingappointed a full professor with RWTH Aachen,</p><p>0165-1684/00/$ - see front matter ( 2000 Elsevier Science B.V. All rights reserved.PII: S 0 1 6 5 - 1 6 8 4 ( 0 0 ) 0 0 1 1 5 - 8</p></li><li><p>signal theory with a particular focus on the con-struction of optimal sequence families becamea main direction of research at the IENT.</p><p>His research group has left its marks in theinternational literature, where we "nd LuK ke-sequencesa, LuK ke-Schotten-sequencesa, andothers named after him and his coworkers. H.D.LuK kes fascination for this subject culminated ina book on correlation signals published in German,and he and his group receiving the EURASIP BestPaper of the Year Awarda for a paper on perfectbinary arrays published in Signal Processing in1989.</p><p>H.D. LuK ke established two more research "eldsnew to the IENT, coding and processing of images,and acoustical signal processing. The image pro-cessing group contributes to the full range of cod-ing concepts from transform coding over motionestimation and hybrid coding, vector quantization,region- and object-oriented coding and fractal cod-ing to scalable coding, and is well recognizedamong experts. In acoustic signal processingbinaural presentation, speech perception in noisyenvironments and hands-free-telephones are thedominant topics, being partly pursued using anarti"cial head developed at the IENT. The successof this group is perhaps documented best by thefounding of a commercial high-tech spino! com-pany which by now operates worldwide.</p><p>A top priority with H.D. LuK ke is teaching andeducation. An excellent lecture on communicationsengineering, with a focus on the consistent develop-ment of communication systems from signal andsystem theory, as well the continuous demand forhis book on the topic, are the best proof for this. Hehas been rewarded by a continuous #ow of topgraduates wanting to work with him as researchassistants toward their Ph.D. No wonder the IENTannals reveal a total of some 48 Ph.D. alumni whowere supervised by H.D. LuK ke, and more than 600publications from IENT during his tenure.</p><p>A rather recent paper by H.D. LuK ke himself,entitled The origins of the sampling theorema,in the April 1999 issue of IEEE Communica-tions Magazine, throws light on one of his otherpassions, which is history. Tracing the oftenindependent contributions of practicians, theore-ticians and mathematicians to what is known asShannons sampling theorema, this paper is anextraordinary blend of passion and profession.Dont miss its conclusions!</p><p>O$cial duties, including a tenure as Dean of theFaculty of electrical engineering, service in the sen-ate of the German Research Council (DFG), on theBoard of Directors of the InformationstechnischeGesellschaft (ITG/VDE) and in state commissions,kept him too often from enjoying the private side ofthis passion, notably Roman history and archeol-ogy. Having turned 65, he could retire from allthese duties. However, not H.D. LuK ke: from theyear 2000, he will act as chairman of the EduardRhein foundation, which each year awards interna-tionally recognized basic research and technologyawards (award winners include C.E. Shannon,H.W. SchuK ssler, A.J. Viterbi, K. Zuse, R.W.Hamming, and, more recently, V.A. Kotelnikov,L. Chiariglione and F. Rocca).</p><p>On behalf of his students, colleagues, and friends,we congratulate Hans Dieter LuK ke warmly andwish him all the best for many years to come.</p><p>Til Aach!Gert Hauske"</p><p>!Institut fur Signalverarbeitung, undProze}rechentechnik,</p><p>Medizinische UniversitaK t zu LuK beck,Ratzeburger Allee 160, 23538</p><p>LuK beck, Germany"Lehrstuhl fuK r Nachrichtentechnik,</p><p>Technische UniversitaK t MuK nchen,Arcisstr. 21, 80290 MuK nchen,</p><p>Germany</p><p>2266 Editorial / Signal Processing 80 (2000) 2265}2266</p></li></ul>