Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node

Research output: Contribution to conferencePaperAcademicpeer-review

Abstract

The issue of frequency offset in low data rate, narrowband and low power communication nodes is considered in this paper. To avoid power hungry precise frequency generation, offset tolerant demodulation and detection schemes are investigated. A Short-Time DFT (ST-DFT) based detection for BFSK is introduced which improves the BER performance of an existing design by almost 1dB. Its BER performance and complexity are also compared to frequency offset tolerant DDBPSK demodulation. Additionally, the effect of wider filter required to capture signal in presence of frequency offset is considered. The trade-off between performance and complexity for different offset values and filter bandwidths is discussed. Both methods work independent of frequency offset; however, it is shown that wider filters do not affect ST-DFT BER performance in contrast with DDBPSK. This robustness is obtained at the expense of increased computational load.
Original languageEnglish
Number of pages8
Publication statusPublished - 13 Dec 2017
Event11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017 - Surfers Paradise, Gold Coast, Australia
Duration: 13 Dec 201715 Dec 2017
Conference number: 11

Conference

Conference11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017
Abbreviated titleICSPCS
CountryAustralia
CityGold Coast
Period13/12/1715/12/17

Fingerprint

Demodulation
Sensor nodes
Discrete Fourier transforms
Bandwidth
Communication

Keywords

  • phase shift keying
  • Wireless Sensor Networks (WSN)
  • Discrete Fourier transforms
  • double differential modulation
  • frequency shift keying

Cite this

Safapourhajari, S., & Kokkeler, A. B. J. (2017). Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node. Paper presented at 11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017, Gold Coast, Australia.
Safapourhajari, Siavash ; Kokkeler, Andre B.J. / Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node. Paper presented at 11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017, Gold Coast, Australia.8 p.
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title = "Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node",
abstract = "The issue of frequency offset in low data rate, narrowband and low power communication nodes is considered in this paper. To avoid power hungry precise frequency generation, offset tolerant demodulation and detection schemes are investigated. A Short-Time DFT (ST-DFT) based detection for BFSK is introduced which improves the BER performance of an existing design by almost 1dB. Its BER performance and complexity are also compared to frequency offset tolerant DDBPSK demodulation. Additionally, the effect of wider filter required to capture signal in presence of frequency offset is considered. The trade-off between performance and complexity for different offset values and filter bandwidths is discussed. Both methods work independent of frequency offset; however, it is shown that wider filters do not affect ST-DFT BER performance in contrast with DDBPSK. This robustness is obtained at the expense of increased computational load.",
keywords = "phase shift keying, Wireless Sensor Networks (WSN), Discrete Fourier transforms, double differential modulation, frequency shift keying",
author = "Siavash Safapourhajari and Kokkeler, {Andre B.J.}",
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Safapourhajari, S & Kokkeler, ABJ 2017, 'Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node' Paper presented at 11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017, Gold Coast, Australia, 13/12/17 - 15/12/17, .

Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node. / Safapourhajari, Siavash ; Kokkeler, Andre B.J.

2017. Paper presented at 11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017, Gold Coast, Australia.

Research output: Contribution to conferencePaperAcademicpeer-review

TY - CONF

T1 - Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node

AU - Safapourhajari, Siavash

AU - Kokkeler, Andre B.J.

PY - 2017/12/13

Y1 - 2017/12/13

N2 - The issue of frequency offset in low data rate, narrowband and low power communication nodes is considered in this paper. To avoid power hungry precise frequency generation, offset tolerant demodulation and detection schemes are investigated. A Short-Time DFT (ST-DFT) based detection for BFSK is introduced which improves the BER performance of an existing design by almost 1dB. Its BER performance and complexity are also compared to frequency offset tolerant DDBPSK demodulation. Additionally, the effect of wider filter required to capture signal in presence of frequency offset is considered. The trade-off between performance and complexity for different offset values and filter bandwidths is discussed. Both methods work independent of frequency offset; however, it is shown that wider filters do not affect ST-DFT BER performance in contrast with DDBPSK. This robustness is obtained at the expense of increased computational load.

AB - The issue of frequency offset in low data rate, narrowband and low power communication nodes is considered in this paper. To avoid power hungry precise frequency generation, offset tolerant demodulation and detection schemes are investigated. A Short-Time DFT (ST-DFT) based detection for BFSK is introduced which improves the BER performance of an existing design by almost 1dB. Its BER performance and complexity are also compared to frequency offset tolerant DDBPSK demodulation. Additionally, the effect of wider filter required to capture signal in presence of frequency offset is considered. The trade-off between performance and complexity for different offset values and filter bandwidths is discussed. Both methods work independent of frequency offset; however, it is shown that wider filters do not affect ST-DFT BER performance in contrast with DDBPSK. This robustness is obtained at the expense of increased computational load.

KW - phase shift keying

KW - Wireless Sensor Networks (WSN)

KW - Discrete Fourier transforms

KW - double differential modulation

KW - frequency shift keying

M3 - Paper

ER -

Safapourhajari S, Kokkeler ABJ. Frequency Offset Tolerant Demodulation for Low Data Rate and Narrowband Wireless Sensor Node. 2017. Paper presented at 11th International Conference on Signal Processing and Communication Systems, ICSPCS 2017, Gold Coast, Australia.