Correction of Sample-Time Error for Time-Interleaved Sampling System Using Cubic Spline Interpolation

Metrology and Measurement Systems

Mei-guo Gao¹  Peng Xu¹  Xiong-jun Fu¹  Guo-man Liu¹  Guo-jie Qin¹ 

关键词: digital correction;    sample-time error;    time-interleaved sampling system;    cubic spline interpolation;   

DOI  :  10.2478/mms-2014-0041

来源: Versita

【 摘 要 】

Sample-time errors can greatly degrade the dynamic range of a time-interleaved sampling system. In this paper, a novel correction technique employing a cubic spline interpolation is proposed for inter-channel sample-time error compensation. The cubic spline interpolation compensation filter is developed in the form of a finite-impulse response (FIR) filter structure. The correction method of the interpolation compensation filter coefficients is deduced. A 4GS/s two-channel, time-interleaved ADC prototype system has been implemented to evaluate the performance of the technique. The experimental results showed that the correction technique is effective to attenuate the spurious spurs and improve the dynamic performance of the system.

【 授权许可】

Unknown