摘要
针对开发板A/D的位数不能充分利用和不同射频模块的输出信号增益相差很大的问题,基于提高信噪比和减小后续处理压力的考虑,文章对零漂及自动增益控制不理想可能带来的信噪比损耗进行分析,并提出利用自适应量化的方法进行量化。分析证明在板卡自身A/D之后进行自适应量化可以有效的减小零漂和自动增益控制不理想带来的信噪比损耗。
The 2bit adaptive A/D converter is designed for making full use of the 12bit A/D converter and solving the problem that different radio frequency module has very different output gain effectively improve the output signal to noise ratio and reduce the pressure of later level. This method can signal processing. Thetheoretic analysis and experiments have proved a success of the method.
出处
《通信技术》
2008年第12期66-68,71,共4页
Communications Technology