Pilot-Based TI-ADC Mismatch Error Calibration for IR-UWB Receivers

Abstract : In this work, we first provide an overview of the state of the art in mismatch error estimation and correction for time-interleaved analog to digital converters (TI-ADCs). Then, we present a novel pilot-based on-line adaptive timing mismatch error estimation approach for TI-ADCs in the context of an impulse radio ultra wideband (IR-UWB) receiver with correlation-based detection. We introduce the developed method and derive the expressions for both additive white Gaussian noise (AWGN) and Rayleigh multipath fading (RMPF) channels. We also derive a lower bound on the required ADC resolution to attain a certain estimation precision. Simulations show the effectiveness of the technique when combined with an adequate compensator. We analyze the estimation error behavior as a function of signal to noise ratio (SNR) and investigate the ADC performance before and after compensation. While all mismatches combined cause the effective number of bits (ENOB) to drop to 3 bits and to 6 bits when considering only timing mismatch, estimation and correction of these errors with the proposed technique can restore a close to ideal behavior. We also show the performance loss at the receiver in terms of bit error rate (BER) and how compensation is able to significantly improve performance.
Document type :
Journal articles
Complete list of metadatas

Cited literature [32 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-02277947
Contributor : Laurent Jonchère <>
Submitted on : Thursday, September 19, 2019 - 4:35:28 PM
Last modification on : Saturday, September 21, 2019 - 1:15:01 AM

File

Schmidt et al-2019-Pilot-based...
Files produced by the author(s)

Identifiers

Citation

Christian A. Schmidt, Jose L. Figueroa, Juan E. Cousseau, Andrea M. Tonello. Pilot-Based TI-ADC Mismatch Error Calibration for IR-UWB Receivers. IEEE Access, IEEE, 2019, 7, pp.74340-74350. ⟨10.1109/ACCESS.2019.2921091⟩. ⟨hal-02277947⟩

Share

Metrics

Record views

23

Files downloads

6