Premium
Realizable filters which give zero intersymbol interference in an fsk system
Author(s) -
Tomlinson Martin
Publication year - 1974
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490020312
Subject(s) - intersymbol interference , bandwidth (computing) , control theory (sociology) , filter (signal processing) , raised cosine filter , frequency domain , discriminator , frequency shift keying , root raised cosine filter , electronic engineering , noise (video) , digital filter , mathematics , computer science , algorithm , telecommunications , engineering , electrical engineering , mathematical analysis , demodulation , channel (broadcasting) , decoding methods , control (management) , artificial intelligence , detector , image (mathematics)
Filter constraints are given which enable filters to be designed which give zero intersymbol interference at the output of the frequency discriminator in an FM system; these constraints are developed in the frequency domain which enables satisfactory noise bandwidths to be obtained. The results are not limited to a particular deviation ratio and are applicable to both continuous and discontinuous phase systems. Some examples are given including a practical IF filter design for a 4.8 K bit/sec, 250 kHz centre frequency, 0.8 deviation ratio system. The noise bandwidth of this filter is 5.72 kHz and it is shown that the minimum possible obtainable noise bandwidth is 4.63 kHz.