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宽带高速电台发射机的发射链路设计,需要满足高带宽、宽动态范围和优良的线性度。本文简述了宽带高速通信发射机的链路保护设计的关键技术,主要阐述了发射增益控制原理,详细说明了发射链路中的基带数字部分、信道部分和功放功率放大部分的电路设计,进行了仿真控制算法分析,提出了峰值环路、电流、温度等综合性的保护控制策略及具体的实现途径。最后结合实际应用,介绍该发射机系统保护设计的应用及其使用效果。
The transmission link design of broadband high-speed radio transmitters needs to meet high bandwidth, wide dynamic range and excellent linearity. In this paper, the key technologies of link protection design for broadband high-speed communication transmitters are briefly described. The principle of transmit gain control is mainly described. The design of the digital part, the channel part and the power amplifier part of the transmit chain are described in detail. Simulation analysis of the control algorithm, the proposed peak loop, current, temperature and other comprehensive protection and control strategies and specific ways to achieve. Finally, the practical application of the transmitter system protection design and its application.