kth.sePublications
Change search
Link to record
Permanent link

Direct link
Alternative names
Publications (10 of 36) Show all publications
Pla, P. d., Pellaco, L., Dwivedi, S., Händel, P. & Jaldén, J. (2020). Clock synchronization over networks using sawtooth models. In: 2020 IEEE international conference on acoustics, speech, and signal processing: . Paper presented at IEEE International Conference on Acoustics, Speech, and Signal Processing, MAY 04-08, 2020, Barcelona, SPAIN (pp. 5945-5949). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Clock synchronization over networks using sawtooth models
Show others...
2020 (English)In: 2020 IEEE international conference on acoustics, speech, and signal processing, Institute of Electrical and Electronics Engineers (IEEE) , 2020, p. 5945-5949Conference paper, Published paper (Refereed)
Abstract [en]

Clock synchronization and ranging over a wireless network with low communication overhead is a challenging goal with tremendous impact. In this paper, we study the use of time-to-digital converters in wireless sensors, which provides clock synchronization and ranging at negligible communication overhead through a sawtooth signal model for round trip times between two nodes. In particular, we derive Cramer-Rao lower bounds for a linearitzation of the sawtooth signal model, and we thoroughly evaluate simple estimation techniques by simulation, giving clear and concise performance references for this technology.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2020
Series
International Conference on Acoustics Speech and Signal Processing ICASSP, ISSN 1520-6149
Keywords
Clock synchronization, ranging, wireless sensor networks (WSN), round-trip time
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications Signal Processing
Identifiers
urn:nbn:se:kth:diva-292077 (URN)10.1109/ICASSP40776.2020.9054426 (DOI)000615970406041 ()2-s2.0-85089219684 (Scopus ID)
Conference
IEEE International Conference on Acoustics, Speech, and Signal Processing, MAY 04-08, 2020, Barcelona, SPAIN
Note

Part of proceedings: ISBN 9781509066315

QC 20210329. QC 20220319

Available from: 2021-03-29 Created: 2021-03-29 Last updated: 2022-06-25Bibliographically approved
Pasku, V., De Angelis, A., Moschitta, A., Carbone, P., Nilsson, J.-O., Dwivedi, S. & Händel, P. (2017). A Magnetic Ranging-Aided Dead-Reckoning Positioning System for Pedestrian Applications. Paper presented at IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 23-26, 2016, Taipei, TAIWAN. IEEE Transactions on Instrumentation and Measurement, 66(5), 953-963
Open this publication in new window or tab >>A Magnetic Ranging-Aided Dead-Reckoning Positioning System for Pedestrian Applications
Show others...
2017 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 66, no 5, p. 953-963Article in journal (Refereed) Published
Abstract [en]

This paper investigates the applicability of a developed Magnetic Positioning System (MPS) as a support for a dead-reckoning inertial navigation system (DR-INS) for pedestrian applications. The integrated system combines the complementary properties of the separate systems, operating over long periods of time and in cluttered indoor areas with partial nonline-of-sight conditions. The obtained results show that the proposed approach can effectively improve the coverage area of the MPS and the operation time with bounded errors of the DR-INS. In particular, a solution that provides bounded position errors of 1-2 m over significantly long periods of time up to 45 min, in realistic indoor environments, is demonstrated. Moreover, system applicability is also shown in those scenarios where arbitrary orientations of the MPS mobile node are considered and an MPS position estimate is not available due to less than three distance measurements.

Place, publisher, year, edition, pages
IEEE, 2017
Keywords
Dead reckoning (DR), indoor positioning, inertial navigation, magnetic fields, range measurement, resonators
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-208236 (URN)10.1109/TIM.2017.2649918 (DOI)000399246000012 ()2-s2.0-85011295568 (Scopus ID)
Conference
IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 23-26, 2016, Taipei, TAIWAN
Funder
VINNOVA
Note

QC 20170628

Available from: 2017-06-28 Created: 2017-06-28 Last updated: 2022-06-27Bibliographically approved
Yajnanarayana, V., Magnusson, K. E. G., Brandt, R., Dwivedi, S. & Händel, P. (2017). Optimal Scheduling for Interference Mitigation by Range Information. IEEE Transactions on Mobile Computing, 16(11), 3167-3181
Open this publication in new window or tab >>Optimal Scheduling for Interference Mitigation by Range Information
Show others...
2017 (English)In: IEEE Transactions on Mobile Computing, ISSN 1536-1233, E-ISSN 1558-0660, Vol. 16, no 11, p. 3167-3181Article in journal (Refereed) Published
Place, publisher, year, edition, pages
IEEE, 2017
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-216601 (URN)10.1109/TMC.2017.2688417 (DOI)000412231100014 ()2-s2.0-85021809245 (Scopus ID)
Note

QC 20171115

Available from: 2017-11-15 Created: 2017-11-15 Last updated: 2022-06-26Bibliographically approved
Zachariah, D., Dwivedi, S., Händel, P. & Stoica, P. (2017). Scalable and Passive Wireless Network Clock Synchronization in LOS Environments. IEEE Transactions on Wireless Communications, 16(6), 3536-3546, Article ID 7880672.
Open this publication in new window or tab >>Scalable and Passive Wireless Network Clock Synchronization in LOS Environments
2017 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 16, no 6, p. 3536-3546, article id 7880672Article in journal (Refereed) Published
Abstract [en]

Clock synchronization is ubiquitous in wireless systems for communication, sensing, and control. In this paper, we design a scalable system in which an indefinite number of passively receiving wireless units can synchronize to a single master clock at the level of discrete clock ticks. Accurate synchronization requires an estimate of the node positions to compensate the time-of-flight transmission delay in line-of-sight environments. If such information is available, the framework developed here takes position uncertainties into account. In the absence of such information, as in indoor scenarios, we propose an auxiliary localization mechanism. Furthermore, we derive the Cramer-Rao bounds for the system, which show that it enables synchronization accuracy at sub-nanosecond levels. Finally, we develop and evaluate an online estimation method, which is statistically efficient.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017
Keywords
nanosecond accuracy, wireless localization, Wireless time synchronization
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-210601 (URN)10.1109/TWC.2017.2683486 (DOI)000403495400035 ()2-s2.0-85020841579 (Scopus ID)
Funder
Swedish Research Council, 621-2014-5874 2016-06079
Note

QC 20170703

Available from: 2017-07-03 Created: 2017-07-03 Last updated: 2024-03-15Bibliographically approved
Cavarec, B., Dwivedi, S., Bengtsson, M. & Händel, P. (2017). Schedule based self localization of asynchronous wireless nodes with experimental validation. In: 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2017: . Paper presented at 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2017, Hilton New Orleans RiversideNew Orleans, United States, 5 March 2017 through 9 March 2017 (pp. 5975-5979). Institute of Electrical and Electronics Engineers (IEEE), Article ID 7953303.
Open this publication in new window or tab >>Schedule based self localization of asynchronous wireless nodes with experimental validation
2017 (English)In: 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 5975-5979, article id 7953303Conference paper (Refereed)
Abstract [en]

In this paper we have proposed clock error mitigation from the measurements in the scheduled based self localization system. We propose measurement model with clock errors while following a scheduled transmission among anchor nodes. Further, RLS algorithm is proposed to estimate clock error and to calibrate measurements of self localizing node against relative clock errors of anchor nodes. A full-scale experimental validation is provided based on commercial off-the-shelf UWB radios under IEEE-standardized protocols.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017
Series
International Conference on Acoustics Speech and Signal Processing ICASSP, ISSN 1520-6149
Keywords
indoor positioning, self-localization, UWB
National Category
Signal Processing
Identifiers
urn:nbn:se:kth:diva-213254 (URN)10.1109/ICASSP.2017.7953303 (DOI)000414286206028 ()2-s2.0-85023770184 (Scopus ID)9781509041176 (ISBN)
Conference
2017 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2017, Hilton New Orleans RiversideNew Orleans, United States, 5 March 2017 through 9 March 2017
Note

QC 20170830

Available from: 2017-08-30 Created: 2017-08-30 Last updated: 2024-03-15Bibliographically approved
Pasku, V., De Angelis, A., Moschitta, A., Carbone, P., Nilsson, J.-O., Dwivedi, S. & Händel, P. (2016). A Magnetic Ranging Aided Dead-Reckoning Indoor Positioning System for Pedestrian Applications. In: 2016 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE PROCEEDINGS: . Paper presented at IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 23-26, 2016, Taipei, TAIWAN (pp. 1526-1531). IEEE conference proceedings
Open this publication in new window or tab >>A Magnetic Ranging Aided Dead-Reckoning Indoor Positioning System for Pedestrian Applications
Show others...
2016 (English)In: 2016 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE PROCEEDINGS, IEEE conference proceedings, 2016, p. 1526-1531Conference paper, Published paper (Refereed)
Abstract [en]

This paper investigates the applicability of a developed magnetic ranging and positioning system (MPS) as a support for a dead reckoning inertial navigation system for pedestrian applications. The integrated system combines the complementary properties of the separate systems, operating over long periods of time and in cluttered indoor areas with partial non-line-of-sight conditions. The obtained results show that the proposed approach can effectively improve the coverage area of the MPS and the operation time with bounded errors of the dead reckoning based system.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
Keywords
Indoor positioning, inertial navigation, dead reckoning, magnetic fields, resonators, range measurement
National Category
Embedded Systems
Identifiers
urn:nbn:se:kth:diva-193853 (URN)10.1109/I2MTC.2016.7520597 (DOI)000382523600268 ()2-s2.0-84980378631 (Scopus ID)978-1-4673-9220-4 (ISBN)
Conference
IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 23-26, 2016, Taipei, TAIWAN
Note

QC 20161017

Available from: 2016-10-17 Created: 2016-10-11 Last updated: 2024-03-15Bibliographically approved
Yajnanarayana, V., Dwivedi, S. & Händel, P. (2016). IR-UWB detection and fusion strategies using multiple detector types. In: IEEE Wireless Communications and Networking Conference, WCNC: . Paper presented at 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016, Doha, Qatar, 3 April 2016 through 7 April 2016. Institute of Electrical and Electronics Engineers (IEEE), Article ID 7565140.
Open this publication in new window or tab >>IR-UWB detection and fusion strategies using multiple detector types
2016 (English)In: IEEE Wireless Communications and Networking Conference, WCNC, Institute of Electrical and Electronics Engineers (IEEE), 2016, article id 7565140Conference paper, Published paper (Refereed)
Abstract [en]

Optimal detection of ultra wideband (UWB) pulses in a UWB transceiver employing multiple detector types is proposed and analyzed in this paper. To enable the transceiver to be used for multiple applications, the designers have different types of detectors such as energy detector, amplitude detector, etc., built in to a single transceiver architecture. We propose several fusion techniques for fusing decisions made by individual IR-UWB detectors. In order to get early insight into theoretical achievable performance of these fusion techniques, we assess the performance of these fusion techniques for commonly used detector types like matched filter, energy detector and amplitude detector under Gaussian assumption. These are valid for ultra short distance communication and in UWB systems operating in millimeter wave (mmwave) band with high directivity gain. In this paper, we utilize the performance equations of different detectors, to device distinct fusion algorithms. We show that the performance can be improved approximately by 4 dB in terms of signal to noise ratio (SNR) for high probability of detection of a UWB signal (> 95%), by fusing decisions from multiple detector types compared to a standalone energy detector, in a practical scenario.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016
Keywords
Neyman-Pearson test, Sensor Networks, Time of Arrival (TOA), Ultra Wideband (UWB), UWB ranging, Broadband networks, Communication channels (information theory), Matched filters, Millimeter waves, Radio transceivers, Signal detection, Signal to noise ratio, Time of arrival, Transceivers, Wireless telecommunication systems, Achievable performance, Gaussian assumption, Millimeter waves (mmwave), Multiple applications, Short distance communications, Ultra-wideband pulse, Ultra-wideband (UWB)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-194858 (URN)10.1109/WCNC.2016.7565140 (DOI)000388603103020 ()2-s2.0-84989813883 (Scopus ID)9781467398145 (ISBN)
Conference
2016 IEEE Wireless Communications and Networking Conference, WCNC 2016, Doha, Qatar, 3 April 2016 through 7 April 2016
Note

QC 20161209

Available from: 2016-12-09 Created: 2016-11-01 Last updated: 2022-06-27Bibliographically approved
Yajanarayana, V., Dwivedi, S. & Händel, P. (2016). Multi Detector Fusion of Dynamic TOA Estimation using Kalman Filter. In: 2016 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC): . Paper presented at 2016 IEEE International Conference on Communications, ICC 2016. IEEE conference proceedings
Open this publication in new window or tab >>Multi Detector Fusion of Dynamic TOA Estimation using Kalman Filter
2016 (English)In: 2016 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC), IEEE conference proceedings, 2016Conference paper, Published paper (Other academic)
Abstract [en]

In this paper, we propose fusion of dynamic TOA (time of arrival) from multiple non-coherent detectors like energy detectors operating at sub-Nyquist rate through Kalman filtering. We also show that by using multiple of these energy detectors, we can achieve the performance of a digital matched filter implementation in the AWGN (additive white Gaussian noise) setting. We derive analytical expression for number of energy detectors needed to achieve the matched filter performance. We demonstrate in simulation the validity of our analytical approach. Results indicate that number of energy detectors needed will be high at low SNRs and converge to a constant number as the SNR increases. We also study the performance of the strategy proposed using IEEE 802.15.4a CM1 channel model and show in simulation that two sub-Nyquist detectors are sufficient to match the performance of digital matched filter.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
Keywords
Time of arrival (TOA), ultra wideband (UWB), UWB ranging
National Category
Signal Processing
Identifiers
urn:nbn:se:kth:diva-181490 (URN)10.1109/ICC.2016.7511611 (DOI)000390993205135 ()2-s2.0-84981333292 (Scopus ID)
Conference
2016 IEEE International Conference on Communications, ICC 2016
Note

QC 20220201

QC 20220201

Available from: 2016-02-02 Created: 2016-02-02 Last updated: 2024-03-15Bibliographically approved
Dwivedi, S., De Angelis, A., Zachariah, D. & Händel, P. (2015). Joint Ranging and Clock Parameter Estimation by Wireless Round Trip Time Measurements. IEEE Journal on Selected Areas in Communications, 33(11), 2379-2390
Open this publication in new window or tab >>Joint Ranging and Clock Parameter Estimation by Wireless Round Trip Time Measurements
2015 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 33, no 11, p. 2379-2390Article in journal (Refereed) Published
Abstract [en]

In this paper, we develop a new technique for estimating fine clock errors and range between two nodes simultaneously by two-way time-of-arrival measurements using impulse-radio ultrawideband signals. Estimators for clock parameters and the range are proposed, which are robust with respect to outliers. They are analyzed numerically and by means of experimental measurement campaigns. The technique and derived estimators achieve accuracies below 1 Hz for frequency estimation, below 1 ns for phase estimation, and 20 cm for range estimation, at a 4-m distance using 100-MHz clocks at both nodes. Therefore, we show that the proposed joint approach is practical and can simultaneously provide clock synchronization and positioning in an experimental system.

Place, publisher, year, edition, pages
IEEE Press, 2015
Keywords
Clock synchronization, range estimation, robust estimators, ultrawideband
National Category
Signal Processing
Identifiers
urn:nbn:se:kth:diva-176946 (URN)10.1109/JSAC.2015.2430521 (DOI)000363238300010 ()2-s2.0-84945119871 (Scopus ID)
Note

QC 20151216

Available from: 2015-12-16 Created: 2015-11-13 Last updated: 2022-06-23Bibliographically approved
Gholami, M. R., Dwivedi, S., Jansson, M. & Händel, P. (2015). Ranging without time stamps exchanging. In: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings: . Paper presented at 40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015, 19 April 2014 through 24 April 2014 (pp. 3981-3985). IEEE conference proceedings
Open this publication in new window or tab >>Ranging without time stamps exchanging
2015 (English)In: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, IEEE conference proceedings, 2015, p. 3981-3985Conference paper, Published paper (Refereed)
Abstract [en]

We investigate the range estimate between two wireless nodes without time stamps exchanging. Considering practical aspects of oscillator clocks, we propose a new model for ranging in which the measurement errors include the sum of two distributions, namely, uniform and Gaussian. We then derive an approximate maximum likelihood estimator (AMLE), which poses a difficult global optimization problem. To avoid the difficulty in solving the complex AMLE, we propose a simple estimator based on the method of moments. Numerical results show a promising performance for the proposed technique.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2015
National Category
Signal Processing
Identifiers
urn:nbn:se:kth:diva-181568 (URN)10.1109/ICASSP.2015.7178718 (DOI)000427402904019 ()2-s2.0-84946048307 (Scopus ID)9781467369978 (ISBN)
Conference
40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015, 19 April 2014 through 24 April 2014
Note

QC 20160229

Available from: 2016-02-29 Created: 2016-02-02 Last updated: 2022-06-23Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7450-8681

Search in DiVA

Show all publications