Demodulation of Double Differential PSK in Presence of Large Frequency Offset and Wide Filter

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

Abstract

The autocorrelation demodulator (ACD) for DDPSK is an offset tolerant demodulator which has been introduced for applications where the signal experiences large Doppler shift. Moreover, emerging ultra-narrowband solutions for Internet of Things and Wireless Sensor Networks can exploit DDPSK to avoid the use of costly crystal or power hungry thermal compensators. However, to tolerate frequency offset the bandwidth of the lowpass or bandpass filter before the demodulator must increase which leads to a larger noise bandwidth and degrades BER performance. This work proposes a new method to overcome this problem. Instead of one path of ACD, samples at the output of the filter go through multiple paths with adjusted delay and interval for correlation in ACD. The sum of the outputs of these paths provide the input to the detector with an increased SNR compared to conventional structure. Using the proposed method, the SNR per bit required for a certain BER remains independent of filter bandwidth if the target BER is less than 0.01.
Original languageEnglish
Title of host publication2018 IEEE 87th Vehicular Technology Conference (VTC Spring)
PublisherIEEE
ISBN (Electronic)978-1-5386-6355-4
DOIs
Publication statusPublished - Jun 2018
Event2018 IEEE 87th Vehicular Technology Conference - Porto Palácio Congress Hotel, Porto, Portugal
Duration: 3 Jun 20186 Jun 2018
Conference number: 87
http://www.ieeevtc.org/vtc2018spring/ (2018 IEEE 87th Vehicular Technology Conference: VTC2018-Spring)

Conference

Conference2018 IEEE 87th Vehicular Technology Conference
Abbreviated titleVTC2018-Spring
CountryPortugal
CityPorto
Period3/06/186/06/18
Internet address

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Demodulators
Phase shift keying
Demodulation
Autocorrelation
Bandwidth
Doppler effect
Bandpass filters
Wireless sensor networks
Detectors
Crystals

Cite this

@inproceedings{2bbb5586ade149c597c331c91e8e35c6,
title = "Demodulation of Double Differential PSK in Presence of Large Frequency Offset and Wide Filter",
abstract = "The autocorrelation demodulator (ACD) for DDPSK is an offset tolerant demodulator which has been introduced for applications where the signal experiences large Doppler shift. Moreover, emerging ultra-narrowband solutions for Internet of Things and Wireless Sensor Networks can exploit DDPSK to avoid the use of costly crystal or power hungry thermal compensators. However, to tolerate frequency offset the bandwidth of the lowpass or bandpass filter before the demodulator must increase which leads to a larger noise bandwidth and degrades BER performance. This work proposes a new method to overcome this problem. Instead of one path of ACD, samples at the output of the filter go through multiple paths with adjusted delay and interval for correlation in ACD. The sum of the outputs of these paths provide the input to the detector with an increased SNR compared to conventional structure. Using the proposed method, the SNR per bit required for a certain BER remains independent of filter bandwidth if the target BER is less than 0.01.",
author = "Siavash Safapourhajari and Kokkeler, {Andre B.J.}",
year = "2018",
month = "6",
doi = "10.1109/VTCSpring.2018.8417526",
language = "English",
booktitle = "2018 IEEE 87th Vehicular Technology Conference (VTC Spring)",
publisher = "IEEE",
address = "United States",

}

Safapourhajari, S & Kokkeler, ABJ 2018, Demodulation of Double Differential PSK in Presence of Large Frequency Offset and Wide Filter. in 2018 IEEE 87th Vehicular Technology Conference (VTC Spring). IEEE, 2018 IEEE 87th Vehicular Technology Conference, Porto, Portugal, 3/06/18. https://doi.org/10.1109/VTCSpring.2018.8417526

Demodulation of Double Differential PSK in Presence of Large Frequency Offset and Wide Filter. / Safapourhajari, Siavash ; Kokkeler, Andre B.J.

2018 IEEE 87th Vehicular Technology Conference (VTC Spring). IEEE, 2018.

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

TY - GEN

T1 - Demodulation of Double Differential PSK in Presence of Large Frequency Offset and Wide Filter

AU - Safapourhajari, Siavash

AU - Kokkeler, Andre B.J.

PY - 2018/6

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N2 - The autocorrelation demodulator (ACD) for DDPSK is an offset tolerant demodulator which has been introduced for applications where the signal experiences large Doppler shift. Moreover, emerging ultra-narrowband solutions for Internet of Things and Wireless Sensor Networks can exploit DDPSK to avoid the use of costly crystal or power hungry thermal compensators. However, to tolerate frequency offset the bandwidth of the lowpass or bandpass filter before the demodulator must increase which leads to a larger noise bandwidth and degrades BER performance. This work proposes a new method to overcome this problem. Instead of one path of ACD, samples at the output of the filter go through multiple paths with adjusted delay and interval for correlation in ACD. The sum of the outputs of these paths provide the input to the detector with an increased SNR compared to conventional structure. Using the proposed method, the SNR per bit required for a certain BER remains independent of filter bandwidth if the target BER is less than 0.01.

AB - The autocorrelation demodulator (ACD) for DDPSK is an offset tolerant demodulator which has been introduced for applications where the signal experiences large Doppler shift. Moreover, emerging ultra-narrowband solutions for Internet of Things and Wireless Sensor Networks can exploit DDPSK to avoid the use of costly crystal or power hungry thermal compensators. However, to tolerate frequency offset the bandwidth of the lowpass or bandpass filter before the demodulator must increase which leads to a larger noise bandwidth and degrades BER performance. This work proposes a new method to overcome this problem. Instead of one path of ACD, samples at the output of the filter go through multiple paths with adjusted delay and interval for correlation in ACD. The sum of the outputs of these paths provide the input to the detector with an increased SNR compared to conventional structure. Using the proposed method, the SNR per bit required for a certain BER remains independent of filter bandwidth if the target BER is less than 0.01.

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