Structure for generating analog I/Q signals from data streams uses a modulation coder to operate through a series circuit for a coding/mapping device, an adjustable digital base band filter and a digital modulation-format converter.

摘要

A modulation coder (11) operates through a series circuit for a coding/mapping device (1,2), an adjustable digital base band filter (4), a digital modulation-format converter (5), an interpolation filter (6), an extra digital correcting filter (7) as required and a digital-analog converter (8) with a low-pass filter (9).