A subspace-based two-way ranging system using a chirp spread spectrum modem, robust to frequency offset

Daegun Oh; Myungkyun Kwak; Jong Wha Chong

doi:10.1109/TWC.2012.030512.111044

A subspace-based two-way ranging system using a chirp spread spectrum modem, robust to frequency offset

Daegun Oh
, Myungkyun Kwak
, Jong Wha Chong

Division of Intelligent Robot

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Herein, we propose and implement a subspace-based two-way ranging system for high resolution indoor ranging that is robust to frequency offset. Due to the frequency offset between wireless nodes, issues about sampling frequency offset (SFO) and carrier frequency offset (CFO) arise in range estimation. Although the problem of SFO is resolved by adopting the symmetric double-sided two-way ranging (SDS-TWR) protocol, the CFO of the received signals impacts the time-of-arrival (TOA) estimation, obtained by conventional subspace-based algorithms such as ESPRIT and MUSIC. Nevertheless, the CFO issue has not been considered with subspace-based TOA estimation algorithms.Our proposed subspace-based algorithm, developed for the robust TOA estimation to CFO, is based on the chirp spread spectrum (CSS) signals. Our subspace-based ranging system is implemented in FPGA with CSS modem using a hardware/software co-design methodology. Simulations and experimental results show that the proposed method can achieve robust ranging between the CSS nodes in an indoor environment with frequency offset.

Original language	English
Article number	6166334
Pages (from-to)	1478-1487
Number of pages	10
Journal	IEEE Transactions on Wireless Communications
Volume	11
Issue number	4
DOIs	https://doi.org/10.1109/TWC.2012.030512.111044
State	Published - Apr 2012

Bibliographical note

Funding Information:
Manuscript received June 2, 2011; revised November 3, 2011 and January 20, 2012; accepted January 21, 2012. The associate editor coordinating the review of this paper and approving it for publication was G. Colavolpe. D. Oh and J.-W. Chong are with Hanyang University, 719ho R&D Building, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791 (e-mail: [email protected]). M.-k. Kwak is with Hynix Semiconductor Inc. This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2012-C1090-1200-0010). The IDEC provide research facilities for this study. This work was supported by the IT R&D program of MKE/KEIT. [10035570, Development of self-powered smart sensor node platform for smart&green building]. This research was also supported by the Brain Korea 21 Project in 2012. Digital Object Identifier 10.1109/TWC.2012.030512.111044

Keywords

Carrier frequency offset
chirp spread spectrum
sampling frequency offset
subspace-based
two-way ranging system

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10.1109/TWC.2012.030512.111044

Cite this

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title = "A subspace-based two-way ranging system using a chirp spread spectrum modem, robust to frequency offset",

abstract = "Herein, we propose and implement a subspace-based two-way ranging system for high resolution indoor ranging that is robust to frequency offset. Due to the frequency offset between wireless nodes, issues about sampling frequency offset (SFO) and carrier frequency offset (CFO) arise in range estimation. Although the problem of SFO is resolved by adopting the symmetric double-sided two-way ranging (SDS-TWR) protocol, the CFO of the received signals impacts the time-of-arrival (TOA) estimation, obtained by conventional subspace-based algorithms such as ESPRIT and MUSIC. Nevertheless, the CFO issue has not been considered with subspace-based TOA estimation algorithms.Our proposed subspace-based algorithm, developed for the robust TOA estimation to CFO, is based on the chirp spread spectrum (CSS) signals. Our subspace-based ranging system is implemented in FPGA with CSS modem using a hardware/software co-design methodology. Simulations and experimental results show that the proposed method can achieve robust ranging between the CSS nodes in an indoor environment with frequency offset.",

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note = "Funding Information: Manuscript received June 2, 2011; revised November 3, 2011 and January 20, 2012; accepted January 21, 2012. The associate editor coordinating the review of this paper and approving it for publication was G. Colavolpe. D. Oh and J.-W. Chong are with Hanyang University, 719ho R\&D Building, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791 (e-mail: [email protected]). M.-k. Kwak is with Hynix Semiconductor Inc. This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2012-C1090-1200-0010). The IDEC provide research facilities for this study. This work was supported by the IT R\&D program of MKE/KEIT. [10035570, Development of self-powered smart sensor node platform for smart\&green building]. This research was also supported by the Brain Korea 21 Project in 2012. Digital Object Identifier 10.1109/TWC.2012.030512.111044",

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N2 - Herein, we propose and implement a subspace-based two-way ranging system for high resolution indoor ranging that is robust to frequency offset. Due to the frequency offset between wireless nodes, issues about sampling frequency offset (SFO) and carrier frequency offset (CFO) arise in range estimation. Although the problem of SFO is resolved by adopting the symmetric double-sided two-way ranging (SDS-TWR) protocol, the CFO of the received signals impacts the time-of-arrival (TOA) estimation, obtained by conventional subspace-based algorithms such as ESPRIT and MUSIC. Nevertheless, the CFO issue has not been considered with subspace-based TOA estimation algorithms.Our proposed subspace-based algorithm, developed for the robust TOA estimation to CFO, is based on the chirp spread spectrum (CSS) signals. Our subspace-based ranging system is implemented in FPGA with CSS modem using a hardware/software co-design methodology. Simulations and experimental results show that the proposed method can achieve robust ranging between the CSS nodes in an indoor environment with frequency offset.

AB - Herein, we propose and implement a subspace-based two-way ranging system for high resolution indoor ranging that is robust to frequency offset. Due to the frequency offset between wireless nodes, issues about sampling frequency offset (SFO) and carrier frequency offset (CFO) arise in range estimation. Although the problem of SFO is resolved by adopting the symmetric double-sided two-way ranging (SDS-TWR) protocol, the CFO of the received signals impacts the time-of-arrival (TOA) estimation, obtained by conventional subspace-based algorithms such as ESPRIT and MUSIC. Nevertheless, the CFO issue has not been considered with subspace-based TOA estimation algorithms.Our proposed subspace-based algorithm, developed for the robust TOA estimation to CFO, is based on the chirp spread spectrum (CSS) signals. Our subspace-based ranging system is implemented in FPGA with CSS modem using a hardware/software co-design methodology. Simulations and experimental results show that the proposed method can achieve robust ranging between the CSS nodes in an indoor environment with frequency offset.

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JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

IS - 4

M1 - 6166334

ER -

A subspace-based two-way ranging system using a chirp spread spectrum modem, robust to frequency offset

Abstract

Bibliographical note

Keywords

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