介绍了实现软件无线电台中FPGA波形可移植性的一般方法，SCA中硬件抽象层的思想，以及针对FPGA芯片的硬件抽象层的定义。
In this paper, the principle to implement the FPGA Waveform Portability and the definition of the hardware abstraction layer for FPGA in SCA is introduced.
在嵌入式系统中，硬件抽象层作为嵌入式操作系统和硬件之间的软件层次是嵌入式应用的一个关键问题。
As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.
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