软件无线电系统适用于多个频段，可灵活地改变工作模式，能与不同体制和标准的各种设备互通和兼容。
Software radio system fits several frequency bands, can change working mode flexible and can be compatible with all kinds of equipment under different systems and standards.
FPGA在分布式计算、并行处理、流水线结构上有独特的优势，自然成为设计软件无线电系统的首选技术之一。
FPGA has become the first choice for designing the software radio system because of its unique advantages in distributed computing, parallel processing and pipelining.
文章提出了一种软件无线电系统中基带调制解调器的设计原理和实现方法，阐述了系统实现的关键硬件技术和系统详细工作工程。
It is proposed a design principle and method of the baseband QPSK modem in radio communication system with discussion about the key hardware technology and the detailed operating process of the modem.
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