A Correlating Receiver for OFDM at Low SNR

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

By extending OFDM symbols, acceptable BER performance can be achieved at low SNRs. Two alternative differential receiver architectures are presented, a receiver based on a FX correlator (Fourier transformation before correlation) and based on an XF correlator (correlation before Fourier transformation). To reduce the complexity and hence the power consumption of both the ADC and the first digital processing stage single- or two bit quantization is used. The receiver based on the XF correlator is more suited to exploit such coarse quantization. Two basic effects are visible if coarse quantization is used. First, the BER performance is reduced due to the introduction of quantization errors. Second, beyond certain SNR levels, the BER performance does not increase due to the correlation between quantization errors. Furthermore, oversampling increases BER performance considerably. For single bit quantization with oversampling, acceptable BERs (< 10 −3) can be achieved for a limited SNR range for symbol extension factors of 32 and 64. In case of two bit quantization without oversampling, the results are comparable with single bit quantization with two times oversampling. For two bit quantization in combination with two times oversampling, acceptable BERs are achieved for symbol extension factors 8, 16, 31 and 64.
Original languageUndefined
Title of host publicationIEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring)
Place of PublicationUSA
PublisherIEEE Vehicular Technology Society
Pages1-5
Number of pages5
ISBN (Print)978-1-4244-8329-7
DOIs
Publication statusPublished - May 2011
EventIEEE 73rd Vehicular Technology Conference, VTC 2011-Spring - Budapest, Hungary
Duration: 15 May 201118 May 2011
Conference number: 73
http://www.ieeevtc.org/vtc2011spring/

Publication series

Name
PublisherIEEE Vehicular Technology Society

Conference

ConferenceIEEE 73rd Vehicular Technology Conference, VTC 2011-Spring
Abbreviated titleVTC Spring 2011
CountryHungary
CityBudapest
Period15/05/1118/05/11
Internet address

Keywords

  • METIS-278715
  • Frequency division multiplexing
  • Fourier transforms
  • Differential phase shift keying
  • IR-77922
  • EWI-20177
  • Terms—Correlation
  • Modulation

Cite this

Kokkeler, A. B. J., & Smit, G. J. M. (2011). A Correlating Receiver for OFDM at Low SNR. In IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring) (pp. 1-5). USA: IEEE Vehicular Technology Society. https://doi.org/10.1109/VETECS.2011.5956427
Kokkeler, Andre B.J. ; Smit, Gerardus Johannes Maria. / A Correlating Receiver for OFDM at Low SNR. IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring). USA : IEEE Vehicular Technology Society, 2011. pp. 1-5
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title = "A Correlating Receiver for OFDM at Low SNR",
abstract = "By extending OFDM symbols, acceptable BER performance can be achieved at low SNRs. Two alternative differential receiver architectures are presented, a receiver based on a FX correlator (Fourier transformation before correlation) and based on an XF correlator (correlation before Fourier transformation). To reduce the complexity and hence the power consumption of both the ADC and the first digital processing stage single- or two bit quantization is used. The receiver based on the XF correlator is more suited to exploit such coarse quantization. Two basic effects are visible if coarse quantization is used. First, the BER performance is reduced due to the introduction of quantization errors. Second, beyond certain SNR levels, the BER performance does not increase due to the correlation between quantization errors. Furthermore, oversampling increases BER performance considerably. For single bit quantization with oversampling, acceptable BERs (< 10 −3) can be achieved for a limited SNR range for symbol extension factors of 32 and 64. In case of two bit quantization without oversampling, the results are comparable with single bit quantization with two times oversampling. For two bit quantization in combination with two times oversampling, acceptable BERs are achieved for symbol extension factors 8, 16, 31 and 64.",
keywords = "METIS-278715, Frequency division multiplexing, Fourier transforms, Differential phase shift keying, IR-77922, EWI-20177, Terms—Correlation, Modulation",
author = "Kokkeler, {Andre B.J.} and Smit, {Gerardus Johannes Maria}",
note = "eemcs-eprint-20177",
year = "2011",
month = "5",
doi = "10.1109/VETECS.2011.5956427",
language = "Undefined",
isbn = "978-1-4244-8329-7",
publisher = "IEEE Vehicular Technology Society",
pages = "1--5",
booktitle = "IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring)",

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Kokkeler, ABJ & Smit, GJM 2011, A Correlating Receiver for OFDM at Low SNR. in IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring). IEEE Vehicular Technology Society, USA, pp. 1-5, IEEE 73rd Vehicular Technology Conference, VTC 2011-Spring, Budapest, Hungary, 15/05/11. https://doi.org/10.1109/VETECS.2011.5956427

A Correlating Receiver for OFDM at Low SNR. / Kokkeler, Andre B.J.; Smit, Gerardus Johannes Maria.

IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring). USA : IEEE Vehicular Technology Society, 2011. p. 1-5.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

TY - GEN

T1 - A Correlating Receiver for OFDM at Low SNR

AU - Kokkeler, Andre B.J.

AU - Smit, Gerardus Johannes Maria

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PY - 2011/5

Y1 - 2011/5

N2 - By extending OFDM symbols, acceptable BER performance can be achieved at low SNRs. Two alternative differential receiver architectures are presented, a receiver based on a FX correlator (Fourier transformation before correlation) and based on an XF correlator (correlation before Fourier transformation). To reduce the complexity and hence the power consumption of both the ADC and the first digital processing stage single- or two bit quantization is used. The receiver based on the XF correlator is more suited to exploit such coarse quantization. Two basic effects are visible if coarse quantization is used. First, the BER performance is reduced due to the introduction of quantization errors. Second, beyond certain SNR levels, the BER performance does not increase due to the correlation between quantization errors. Furthermore, oversampling increases BER performance considerably. For single bit quantization with oversampling, acceptable BERs (< 10 −3) can be achieved for a limited SNR range for symbol extension factors of 32 and 64. In case of two bit quantization without oversampling, the results are comparable with single bit quantization with two times oversampling. For two bit quantization in combination with two times oversampling, acceptable BERs are achieved for symbol extension factors 8, 16, 31 and 64.

AB - By extending OFDM symbols, acceptable BER performance can be achieved at low SNRs. Two alternative differential receiver architectures are presented, a receiver based on a FX correlator (Fourier transformation before correlation) and based on an XF correlator (correlation before Fourier transformation). To reduce the complexity and hence the power consumption of both the ADC and the first digital processing stage single- or two bit quantization is used. The receiver based on the XF correlator is more suited to exploit such coarse quantization. Two basic effects are visible if coarse quantization is used. First, the BER performance is reduced due to the introduction of quantization errors. Second, beyond certain SNR levels, the BER performance does not increase due to the correlation between quantization errors. Furthermore, oversampling increases BER performance considerably. For single bit quantization with oversampling, acceptable BERs (< 10 −3) can be achieved for a limited SNR range for symbol extension factors of 32 and 64. In case of two bit quantization without oversampling, the results are comparable with single bit quantization with two times oversampling. For two bit quantization in combination with two times oversampling, acceptable BERs are achieved for symbol extension factors 8, 16, 31 and 64.

KW - METIS-278715

KW - Frequency division multiplexing

KW - Fourier transforms

KW - Differential phase shift keying

KW - IR-77922

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KW - Modulation

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BT - IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring)

PB - IEEE Vehicular Technology Society

CY - USA

ER -

Kokkeler ABJ, Smit GJM. A Correlating Receiver for OFDM at Low SNR. In IEEE 73rd Vehicular Technology Conference Fall (VTC 2011-Spring). USA: IEEE Vehicular Technology Society. 2011. p. 1-5 https://doi.org/10.1109/VETECS.2011.5956427