Abstract:Multifunctional Integrated RF System(MIRFS) is an important way to integrate various RF functions of shipborne, airborne, spaceborne and other space-limited platforms, such as radar, wireless communication, electronic warfare, navigation and positioning, and its core is aperture integration, RF integration and software integration. Aiming at the multi-task sharing requirement of RF integration for MIRFS, a multichannel all-digital transmitter architecture is proposed. This architecture has the data channels with independent parameters configuration, each channel starts by digitally orthogonal up-conversion of the input baseband I/Q data to an appropriate Intermediate Frequency(IF). Then, two pairs of inverting digital pulse sequences are generated by pulse coding of IF I/Q data with two pairs of Band-Pass Delta Sigma Modulator(BPDSM). The BPDSM pulse sequences generated by all channels are interpolated, and the data are finally integrated into 1-way digital pulse sequences through data interweaving, so as to realize the digital synthesis of multi-channel RF modulation signals. Simulation shows that the architecture can improve the flexibility and adaptability of MIRFS by independently configuring multiple channel parameters.