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作者:

Liu, Su Juan (Liu, Su Juan.) | Wang, Jun Shan (Wang, Jun Shan.) | Qi, Pei Pei (Qi, Pei Pei.)

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EI Scopus SCIE

摘要:

Hybrid filter bank (HFB) analog-to-digital converters (ADCs) are used to achieve higher sampling rates for medium-to-high resolution applications in many communication systems. However, the analog filter realization errors and channel mismatches severely degrade the reconstruction performance of HFB ADCs. A general error analysis, which takes analog imperfections and channel mismatches into consideration based on a single-channel filtering (SCF) HFB architecture is presented in this paper. A frequency-dependent model (FDM) for sub-ADCs output is then derived to integrate all the realization errors to an equivalent channel-transfer function (ECTF). Based on the ECTF, the perfect reconstruction condition is derived as the optimization object for the synthesis filter banks. Finally, a two-channel SCF HFB ADC prototype with 12-bit resolution and 200 MHz sampling rate is implemented. After mismatch correction with 64-tap finite impulse response (FIR) filters, 75.75 dB of spurious-free dynamic range (SFDR) is achieved over the whole bandwidth. The experimental results show that the average SFDR is enhanced by about 10-25 dB compared with the traditional calibration method.

关键词:

Analog-to-digital converter (ADC) Calibration Frequency-dependent model (FDM) Hybrid filter bank (HFB) Realization errors Single-channel filtering (SCF)

作者机构:

  • [ 1 ] [Liu, Su Juan]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Jun Shan]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Qi, Pei Pei]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Liu, Su Juan]Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China

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来源 :

CIRCUITS SYSTEMS AND SIGNAL PROCESSING

ISSN: 0278-081X

年份: 2014

期: 3

卷: 33

页码: 761-779

2 . 3 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:123

JCR分区:3

中科院分区:4

被引次数:

WoS核心集被引频次: 5

SCOPUS被引频次: 5

ESI高被引论文在榜: 0 展开所有

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