TRANSMITTING SIGNALS VIA AT LEAST TWO CHANNELS SIMULTANEOUSLY

摘要

A transmitter (10) of an apparatus (1) for transmitting signals via at least two channels simultaneously is provided with a data processing system (30), a first serial branch (20) comprising a first inverse Fourier transformer (40,42), a second serial branch (21) comprising a second inverse Fourier transformer (41), a digital-to-analog converting system (50-53) and a radio system (60-63), the first and second serial branches being coupled in parallel. This transmitter (10) is backward compatible to a high extent. The radio system (60-­63) either comprises a radio unit (60,61,62) per serial branch (20,21) or is located after the combiner (15-17) to save hardware. In the latter case, a component converter (90) or an upsampler/phaseshifter (100) is required in the first serial branch (20). The digital-to-analog converting system (50-53) either comprises a converters (50,51,52) per serial branch (20,21) or is located after a combiner (15-17) to save hardware. In the latter case, an upsampler (101) is required in the second serial branch (21).