ISI-Free Linear Combination Pulses with Better Performance

Cesar AZURDIA-MEZA  Kyujin LEE  Kyesan LEE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E96-B   No.2   pp.635-638
Publication Date: 2013/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.635
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
intersymbol interference (ISI),  linear combination,  Nyquist pulses,  

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Summary: 
In this letter we proposed the linear combination of two ISI-free pulses with different decay rates in order to obtain a new Nyquist pulse. The proposed pulse contains a new design parameter β, giving an additional degree of freedom to minimize the bit error probability performance in the presence of symbol-timing errors, for a given roll-off factor α. Several practical tools are implemented for evaluating the performance of the proposed filter. The novel pulse is evaluated in terms of the bit error probability performance in the presence of symbol-timing errors. Eye diagrams are presented to visually assess the vulnerability of the transmission system to ISI, and the maximum distortion is estimated as a quantitative measure of performance.