摘要
文章针对理想和非理想的不同条件,从理论上分析了量化误差对于数字波束合成(DBF)中输出信噪比SNR的影响。分析既考虑了信号的量化误差,同时又考虑了权值的量化误差,并给出了相应的仿真结果。分析表明,量化比特数增加可以提高系统SNR,但是增加到一定值后对性能改善不再明显。分析过程和结论,对于系统设计时量化比特数确定具有参考意义。
The affection of quantization error for SNR in digital beam forming （DBF） is analyzed on the perfect and normal conditions respectively. Quantization error of signals and weight values is considered together, and the simulation result is given at last. The analysis shows that the SNR is improved by increasing the quantization bit number. But when it is large enough, the impact does not change any more. The analysis result and process are valuable for the decision of quantization bit number in the system design.
出处
《电路与系统学报》
CSCD
北大核心
2006年第4期108-111,共4页
Journal of Circuits and Systems
基金
重庆市自然科学基金(2005BB2195)
重庆大学研究生教育创新基金
