Subcarrier weighting scheme in OFDM receiver with ΣΔ A/D converter on multipath fading channels

Ayana Suzuki, Mamiko Inamori, Yukitoshi Sanada

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

1 Citation (Scopus)

Abstract

In OFDM receivers, an analog-to-digital converter must convert a signal with large bandwidth and high resolution. A ΣΔ modulator is a type of A/D converters that has very high resolution. However, it has lower bandwidth than the other types of A/D converters because the quantization noise of the ΣΔ modulator increases in high frequency. Moreover, the oversampling rate of the ΣΔ modulator needs to be decreased for reduction of power consumption. In this paper, performance of an OFDM receiver with the ΣΔ modulator using a subcarrier weighting scheme is investigated. The symbol weighting scheme is used with a soft-decision Viterbi decoder in the receiver, and the symbol on each subcarrier is weighted by a coefficient derived from the output noise spectrum of the ΣΔ modulator. The numerical results obtained through computer simulation show that the BER performance is improved by about 2-3 dB on multipath fading channels.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
DOIs
Publication statusPublished - 2010
Event2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Ottawa, ON, Canada
Duration: 2010 Sep 62010 Sep 9

Other

Other2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall
CountryCanada
CityOttawa, ON
Period10/9/610/9/9

Fingerprint

Multipath fading
Modulator
Multipath
Fading Channels
Orthogonal Frequency Division multiplexing (OFDM)
Converter
Fading channels
Orthogonal frequency division multiplexing
Modulators
Weighting
Receiver
High Resolution
Bandwidth
Oversampling
Analog-to-digital Converter
Digital to analog conversion
Power Consumption
Convert
Quantization
Electric power utilization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Subcarrier weighting scheme in OFDM receiver with ΣΔ A/D converter on multipath fading channels. / Suzuki, Ayana; Inamori, Mamiko; Sanada, Yukitoshi.

IEEE Vehicular Technology Conference. 2010. 5594188.

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

Suzuki, A, Inamori, M & Sanada, Y 2010, Subcarrier weighting scheme in OFDM receiver with ΣΔ A/D converter on multipath fading channels. in IEEE Vehicular Technology Conference., 5594188, 2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall, Ottawa, ON, Canada, 10/9/6. https://doi.org/10.1109/VETECF.2010.5594188
Suzuki, Ayana ; Inamori, Mamiko ; Sanada, Yukitoshi. / Subcarrier weighting scheme in OFDM receiver with ΣΔ A/D converter on multipath fading channels. IEEE Vehicular Technology Conference. 2010.
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