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Low Cost Least Squares Optimization Method for Sub-nyquist Rate Two-Phase Holding Digital-to-Analog Conversion

机译:奈奎斯特速率两相保持数模转换的低成本最小二乘优化方法

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In this paper, a low cost least squares optimization method for sub-Nyquist rate output of a two-phase holding (TPH) DAC is proposed. The pseudoinverse matrix of the TPH mode DAC reconstruction matrix is analyzed, and based on the analysis, a direct data manipulation method is proposed to replace matrix operations for reducing the computational complexity. The proposed least squares optimization method is able to improve the spurious free dynamic range by suppressing unwanted signals inside the bandwidth of interest. Simulation results show that the computational complexity can be reduced by six orders of magnitude.
机译:本文提出了一种低成本的最小二乘优化方法,用于两相保持(TPH)DAC的亚奈奎斯特速率输出。分析了TPH模式DAC重构矩阵的伪逆矩阵,并在分析的基础上,提出了一种直接的数据处理方法来代替矩阵运算,以降低计算复杂度。所提出的最小二乘最优化方法能够通过抑制感兴趣带宽内的有害信号来改善无杂散动态范围。仿真结果表明,计算复杂度可以降低六个数量级。

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