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The significance of the famous Shannon's publication "A mathematical theory of communication" is discussed. The author states that this theory was a breakthrough for the times it was created. The present-day communications is so highly developed, that some old maxims should be up-dated, particularly the definition of the lower bound of signal reception. The author claims that this bound is no longer a constant value, 1n(2), as the Shannon's theory states, but depends on many factors such, as the ratio of bandwidth-to-information transmission rate, the class of a receiver (adaptive, cognitive, MIMO1) the kind of reception system (on-line or off-line), and - of course on the characteristics of noise, including entropy. Then, an absolute limit (Eb/ No )abs = 0 is suggested. An example of an advanced adaptive system approaching this bound is given.
Rocznik
Tom
Strony
247--251
Opis fizyczny
Bibliogr. 10 poz., rys.
Twórcy
autor
- Defence Communication Institute, Radom University of Technology, 29 Malczewskiego St., 26-600 Radom, Poland, j.pawelec@wil.waw.pl
Bibliografia
- [1] C. Shannon, "A mathematical theory of communication", The Bell System Teem. J. 1-77 (1948).
- [2] C. Shannon, Works on Information Theory and Cybernetics, IIŁ. Moscow, 1963, (in Russian).
- [3] J. Pawelec, "Optimum nonwhite detection. a double-matched digital filter approach", Bull. Pol. Ac.: Tech. 51 (1), 1-12 (2002).
- [4] J. Pawelec and R. Piotrowski, "Optimum filtration of NB interference in DS-CDMA satellite systems", Int. J. Sat. Cam. & Networking 21,119-125 (2003).
- [5] J. Pawelec, "An adaptive non-AWGN spread spectrum multiple access receiver", IEEE Communications Magazine, 126-127 (2002).
- [6] C. Berrou, A. Glavieux, and P. Thitimajshima, "Near Shannon limit error correcting coding and decoding: turbo codes", Int. Communications Conf. (ICC) , 1064-1068 (1993).
- [7] M. Lesniewicz, Private Communications, 2007.
- [8] L. Couch, Digital and Analog Communication Systems, Macmillan, London, 1987.
- [9] B. Sklar, Digital Communications, Prentice Hall, New Jersey, 2002.
- [10] J. Pawelec, "An information-communication system based on MIMO technology", J. Communications 17, (2008), (invited paper - to be published).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPG5-0034-0012