Method and device for variable-speed transmission

摘要

Described herein is a variable rate transmission apparatus for spreading-modulation on data signals by using spreading code sequences and transmission of the so-processed signals therefrom. The variable rate transmission apparatus is provided with means (4, 5 and 6) for spreading-modulating the data signals in a binary sequence using bi-orthogonal signals and transmission of the so-processed signals when a transmission rate of each data signal is greater than or equal to a predetermined transmission rate (128 kbps).