∑ΔADC with fractional sample rate conversion for software defined radio receiver

Akira Tanaka, Mamiko Inamori, Yukitoshi Sanada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

An analog-to-digital converter (∑ΔADC) in a software defined radio (SDR) receiver must be able to support the specifications of various wireless standards. It should also work with the low power supply voltage of CMOS circuits. A ∑ΔADC is one of the solutions for the SDR receiver. However, the power consumption of the circuits, such as a lowpass filter (LPF) and a decimator after the modulator is large due to the high sampling speed. On the other hand, since a different wireless communication standard has a different master clock rate, it is necessary to provide the clock rate suitable for each standard. As a solution for the problem, direct insertion/deletion based sample rate conversion (SRC) has been proposed. Nevertheless, in order to apply this method to the ∑ΔADC, the problem of the high clock speed in the circuits of the LPF after modulator remains. In this paper, a novel ∑ΔADC with fractional SRC is proposed. In the proposed scheme, SRC and filtering are combined. By filtering and decimating the output of the modulator in parallel with Q transversal filters the clock speed of the circuits of the SRC and the LPF can be reduced P times for Q/P SRC.

Original languageEnglish
Title of host publicationProceedings of the 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011
Pages151-155
Number of pages5
DOIs
Publication statusPublished - 2011
Event2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011 - Osaka, Japan
Duration: 2011 Jun 12011 Jun 3

Publication series

NameProceedings of the 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011

Other

Other2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011
CountryJapan
CityOsaka
Period11/6/111/6/3

Keywords

  • Direct Insertion/Deletion
  • Fractional SRC
  • SDR
  • ∑ΔADC

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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