Pulse-shaping filters with ISI-free matched and unmatched filter properties

Pulse-shaping filters which have intersymbol-interference-free properties, with or without matched filtering at the receiver, may reduce the hardware cost of modem systems in some applications. A new class of such filters, with the one given by Xia (see ibid., vol.45, p.1157-58, 1997) as a special case, is proposed. This is done by showing that such a filter can be deduced from any one of a wide variety of ISI-free filters.