Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system

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

4 Citations (Scopus)

Abstract

In this paper, a new aspect on the problem of carrier frequency offset (CFO) estimation is studied in a frequency-hopping (FH) orthogonal frequency division multiplexing (OFDM) system. Unlike in a traditional nonhopped OFDM system, in FH-OFDM system it is important to verify how accurately frequency-switching must be performed before the CFO estimation can take place with adequate performance. The accuracy of frequency-switching is evaluated through frequency-hopping timing offset (FHO) and frequency-hopping phase offset (PHO) between the received signal and the signal produced by the local frequency-hopping synthesizer of the receiver. The target system uses ultra-wideband (UWB) in order to achieve very high data rate of 1.6 Gbit/s. The performance of selected autocorrelation based algorithms is simulated in multipath fading channel under the FHO and PHO, and the results are compared to the performance of ideal frequency-switching and the corresponding analytical Cramer-Rao bound. It is found that the CFO estimators based on autocorrelation principle are quite robust to the FHO less than half the hopping period. Furthermore, simple methods are proposed to compensate the degradation caused by the FHO. The estimators are, however, sensitive to the PHO caused by the possible lack of phase memory in the frequency-hopping synthesizer resulting in a significant bias to the CFO estimate.
Original languageEnglish
Title of host publication2007 IEEE 65th Vehicular Technology Conference
Subtitle of host publicationVTC2007-Spring
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages2379-2383
ISBN (Print)1-4244-0266-2
DOIs
Publication statusPublished - 2007
MoE publication typeA4 Article in a conference publication
EventIEEE 65th Vehicular Technology Conference, VTC2007-Spring - Dublin, Ireland
Duration: 22 Apr 200725 Apr 2007
Conference number: 65

Conference

ConferenceIEEE 65th Vehicular Technology Conference, VTC2007-Spring
Abbreviated titleVTC2007-Spring
CountryIreland
CityDublin
Period22/04/0725/04/07

Fingerprint

Frequency estimation
Frequency hopping
Autocorrelation
Orthogonal frequency division multiplexing
Switching frequency
Cramer-Rao bounds
Multipath fading
Ultra-wideband (UWB)
Fading channels
Data storage equipment
Degradation

Keywords

  • multicarrier modulation
  • very high data rate
  • ultra-wideband
  • imperfect frequency-hopping

Cite this

Anttonen, A., Siltala, S., & Mämmelä, A. (2007). Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system. In 2007 IEEE 65th Vehicular Technology Conference: VTC2007-Spring (pp. 2379-2383). IEEE Institute of Electrical and Electronic Engineers . https://doi.org/10.1109/VETECS.2007.491
Anttonen, Antti ; Siltala, Sami ; Mämmelä, Aarne. / Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system. 2007 IEEE 65th Vehicular Technology Conference: VTC2007-Spring. IEEE Institute of Electrical and Electronic Engineers , 2007. pp. 2379-2383
@inproceedings{f7570d0fc551415fb37b3bd140dc4c64,
title = "Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system",
abstract = "In this paper, a new aspect on the problem of carrier frequency offset (CFO) estimation is studied in a frequency-hopping (FH) orthogonal frequency division multiplexing (OFDM) system. Unlike in a traditional nonhopped OFDM system, in FH-OFDM system it is important to verify how accurately frequency-switching must be performed before the CFO estimation can take place with adequate performance. The accuracy of frequency-switching is evaluated through frequency-hopping timing offset (FHO) and frequency-hopping phase offset (PHO) between the received signal and the signal produced by the local frequency-hopping synthesizer of the receiver. The target system uses ultra-wideband (UWB) in order to achieve very high data rate of 1.6 Gbit/s. The performance of selected autocorrelation based algorithms is simulated in multipath fading channel under the FHO and PHO, and the results are compared to the performance of ideal frequency-switching and the corresponding analytical Cramer-Rao bound. It is found that the CFO estimators based on autocorrelation principle are quite robust to the FHO less than half the hopping period. Furthermore, simple methods are proposed to compensate the degradation caused by the FHO. The estimators are, however, sensitive to the PHO caused by the possible lack of phase memory in the frequency-hopping synthesizer resulting in a significant bias to the CFO estimate.",
keywords = "multicarrier modulation, very high data rate, ultra-wideband, imperfect frequency-hopping",
author = "Antti Anttonen and Sami Siltala and Aarne M{\"a}mmel{\"a}",
note = "Project code: 3109",
year = "2007",
doi = "10.1109/VETECS.2007.491",
language = "English",
isbn = "1-4244-0266-2",
pages = "2379--2383",
booktitle = "2007 IEEE 65th Vehicular Technology Conference",
publisher = "IEEE Institute of Electrical and Electronic Engineers",
address = "United States",

}

Anttonen, A, Siltala, S & Mämmelä, A 2007, Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system. in 2007 IEEE 65th Vehicular Technology Conference: VTC2007-Spring. IEEE Institute of Electrical and Electronic Engineers , pp. 2379-2383, IEEE 65th Vehicular Technology Conference, VTC2007-Spring, Dublin, Ireland, 22/04/07. https://doi.org/10.1109/VETECS.2007.491

Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system. / Anttonen, Antti; Siltala, Sami; Mämmelä, Aarne.

2007 IEEE 65th Vehicular Technology Conference: VTC2007-Spring. IEEE Institute of Electrical and Electronic Engineers , 2007. p. 2379-2383.

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

TY - GEN

T1 - Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system

AU - Anttonen, Antti

AU - Siltala, Sami

AU - Mämmelä, Aarne

N1 - Project code: 3109

PY - 2007

Y1 - 2007

N2 - In this paper, a new aspect on the problem of carrier frequency offset (CFO) estimation is studied in a frequency-hopping (FH) orthogonal frequency division multiplexing (OFDM) system. Unlike in a traditional nonhopped OFDM system, in FH-OFDM system it is important to verify how accurately frequency-switching must be performed before the CFO estimation can take place with adequate performance. The accuracy of frequency-switching is evaluated through frequency-hopping timing offset (FHO) and frequency-hopping phase offset (PHO) between the received signal and the signal produced by the local frequency-hopping synthesizer of the receiver. The target system uses ultra-wideband (UWB) in order to achieve very high data rate of 1.6 Gbit/s. The performance of selected autocorrelation based algorithms is simulated in multipath fading channel under the FHO and PHO, and the results are compared to the performance of ideal frequency-switching and the corresponding analytical Cramer-Rao bound. It is found that the CFO estimators based on autocorrelation principle are quite robust to the FHO less than half the hopping period. Furthermore, simple methods are proposed to compensate the degradation caused by the FHO. The estimators are, however, sensitive to the PHO caused by the possible lack of phase memory in the frequency-hopping synthesizer resulting in a significant bias to the CFO estimate.

AB - In this paper, a new aspect on the problem of carrier frequency offset (CFO) estimation is studied in a frequency-hopping (FH) orthogonal frequency division multiplexing (OFDM) system. Unlike in a traditional nonhopped OFDM system, in FH-OFDM system it is important to verify how accurately frequency-switching must be performed before the CFO estimation can take place with adequate performance. The accuracy of frequency-switching is evaluated through frequency-hopping timing offset (FHO) and frequency-hopping phase offset (PHO) between the received signal and the signal produced by the local frequency-hopping synthesizer of the receiver. The target system uses ultra-wideband (UWB) in order to achieve very high data rate of 1.6 Gbit/s. The performance of selected autocorrelation based algorithms is simulated in multipath fading channel under the FHO and PHO, and the results are compared to the performance of ideal frequency-switching and the corresponding analytical Cramer-Rao bound. It is found that the CFO estimators based on autocorrelation principle are quite robust to the FHO less than half the hopping period. Furthermore, simple methods are proposed to compensate the degradation caused by the FHO. The estimators are, however, sensitive to the PHO caused by the possible lack of phase memory in the frequency-hopping synthesizer resulting in a significant bias to the CFO estimate.

KW - multicarrier modulation

KW - very high data rate

KW - ultra-wideband

KW - imperfect frequency-hopping

U2 - 10.1109/VETECS.2007.491

DO - 10.1109/VETECS.2007.491

M3 - Conference article in proceedings

SN - 1-4244-0266-2

SP - 2379

EP - 2383

BT - 2007 IEEE 65th Vehicular Technology Conference

PB - IEEE Institute of Electrical and Electronic Engineers

ER -

Anttonen A, Siltala S, Mämmelä A. Timing and phase offset sensitivity of autocorrelation based frequency estimation in an FH-OFDM system. In 2007 IEEE 65th Vehicular Technology Conference: VTC2007-Spring. IEEE Institute of Electrical and Electronic Engineers . 2007. p. 2379-2383 https://doi.org/10.1109/VETECS.2007.491