面向多功能综合射频系统的多通道全数字发信机

Multichannel All-Digital Transmitter for Multifunction Integrated RF System

摘要:

多功能综合射频系统(MIRFS)是解决舰载、机载、星载等空间受限平台雷达、无线通信、电子战、导航定位等多种射频功能综合集成的重要途径，其核心是孔径综合、射频综合和软件综合。针对射频综合对MIRFS射频信道的多任务共用需求，提出一种多通道全数字发信机架构。该架构具有多个参数独立配置的数据通道，每个通道首先将输入基带I/Q数据数字正交上变频到一个合适的中频；然后利用2对带通增量求和调制器(BPDSM)分别对中频I/Q数据进行脉冲编码，产生2对反相数字脉冲序列。对所有通道产生的BPDSM脉冲序列进行内插，最后通过数据交织合并为1路数字脉冲序列，从而实现对多路射频调制信号的数字综合。仿真表明，通过对多个通道参数的独立配置，该架构可提高MIRFS的灵活性和适应性。

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.