| 摘要 |
<p>The invention relates to the formation of a wide-band data transfer link (WB) as an extension to a data transfer system, which comprises narrow frequency bands (f2) for the organization of narrow-band data transfer calls using one frequency band. In accordance with the invention the data stream (S) which is to be transmitted is divided into substreams (S5-S9), each of which modulates a different frequency band (f5-f9). The signals thus obtained are combined (C) for transmission. The received signal is divided into frequency bands, which are demodulated separately, and from the data substreams thus obtained the original data stream is reconstructed. The wide-band communication in accordance with the invention (WB) may further be divided among many users on the principle of time- or frequency-division multiple access.</p> |
