Performance Optimization of Time Delay Estimation Based on Chirp Spread Spectrum Using ESPRIT

Jang, Seong-Hyun; Kim, Yeong-Sam; Yoon, Sang‐Hoon; Chong, Jong‐Wha

doi:10.1587/transcom.e94.b.607

Cited by 2 publications

(6 citation statements)

References 4 publications

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“…It is reasonable to consider the sampling time offset and the symbol time offset which are induced by clock drift because multiple chirp symbols are concatenated. Then, after sampling of the received multiple chirp symbols in (2), the received n-th sample in the m-th chirp symbol can be modeled as …”

Section: Problem Definitionmentioning

confidence: 99%

“…The dechirping process is performed as in [2], which multiplies avg,appr ( ) r n by the conjugate of s(n) as…”

Section: Time Delay Estimation Using the Averaged Chirp Symbolmentioning

confidence: 99%

“…In TDE, Fourier transform, which is essential to obtain channel frequency response, imposes additional complexity. However, chirp helps us to reduce additional complexity by using a dechirping process in [2] because the complexity of dechirping process is much smaller than that of Fourier transform. Especially, the TDE problem of the linear chirp can be converted into the frequency estimation problem of the sinusoid through the dechirping process in [2].…”

Section: Introductionmentioning

confidence: 99%

“…However, chirp helps us to reduce additional complexity by using a dechirping process in [2] because the complexity of dechirping process is much smaller than that of Fourier transform. Especially, the TDE problem of the linear chirp can be converted into the frequency estimation problem of the sinusoid through the dechirping process in [2]. Thus, the linear chirp can be applied to the estimation of signal parameters via rotational invariance techniques (ESPRIT) in [3], which is one of frequency estimation algorithms based on the subspace separation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

SNR Enhancement Algorithm Using Multiple Chirp Symbols with Clock Drift for Accurate Ranging

Jang¹,

Kim²,

Yoon³

et al. 2011

ETRI J

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Seong-Hyun Jang et al. 841A signal-to-noise ratio (SNR) enhancement algorithm using multiple chirp symbols with clock drift is proposed for accurate ranging. Improvement of the ranging performance can be achieved by using the multiple chirp symbols according to Cramer-Rao lower bound; however, distortion caused by clock drift is inevitable practically. The distortion induced by the clock drift is approximated as a linear phase term, caused by carrier frequency offset, sampling time offset, and symbol time offset. SNR of the averaged chirp symbol obtained from the proposed algorithm based on the phase derotation and the symbol averaging is enhanced. Hence, the ranging performance is improved. The mathematical analysis of the SNR enhancement agrees with the simulations.

show abstract

Section: Problem Definitionmentioning

confidence: 99%

“…The dechirping process is performed as in [2], which multiplies avg,appr ( ) r n by the conjugate of s(n) as…”

Section: Time Delay Estimation Using the Averaged Chirp Symbolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

SNR Enhancement Algorithm Using Multiple Chirp Symbols with Clock Drift for Accurate Ranging

Jang¹,

Kim²,

Yoon³

et al. 2011

ETRI J

Self Cite

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show abstract

“…Without FT, a sum of sine waves with channel information can be obtained using de-chirping process in [8]. The de-chirping process is the operation that multiplies the received signal by the conjugate of the transmitted signal.…”

mentioning

confidence: 99%

A New Diversity Combining Scheme Based on Interleaving Method for Time-of-arrival Estimation of Chirp Signal

Jang¹,

Chong²

2012

Journal of IKEEE

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A new diversity combining scheme is proposed for time-of-arrival (TOA) estimation of chirp signal in dense multipath channel. In the multipath channel, the performance of TOA estimation using conventional correlation matrix-based diversity combining scheme is degraded due to the lack of de-correlation effect. To increase the de-correlation effect, the proposed diversity scheme employs interleaving method based on the property of de-chirped signal. As a result, the proposed scheme increases de-correlation effect and also reduces the noise of TOA estimation. Finally, the diversity achieved from the proposed scheme improves TOA estimation performance. The de-correlation effect is analyzed mathematically. The estimation accuracy of the proposed diversity scheme is superior to that of conventional diversity scheme in multipath channel.

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Performance Optimization of Time Delay Estimation Based on Chirp Spread Spectrum Using ESPRIT

Cited by 2 publications

References 4 publications

SNR Enhancement Algorithm Using Multiple Chirp Symbols with Clock Drift for Accurate Ranging

SNR Enhancement Algorithm Using Multiple Chirp Symbols with Clock Drift for Accurate Ranging

A New Diversity Combining Scheme Based on Interleaving Method for Time-of-arrival Estimation of Chirp Signal

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