Double phase estimator: new unambiguous binary offset carrier tracking algorithm

Borio, Daniele

doi:10.1049/iet-rsn.2013.0306

Cited by 48 publications

(52 citation statements)

References 19 publications

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“…After the loop filter processing, τ ∆sc is fed back to adjust the lower sideband carrier phase in (6). Therefore, the loop of the subcarrier phase is closed for tracking its changes.…”

Section: B Principle Of Coherent Combination Discriminatormentioning

confidence: 99%

“…As the upper sideband only contains half the power of BOC signal, the (C/N 0 ) U loss is initially 3 dB. The front-end and decimation filters remove the high-order frequency components, which induces a loss of at least 10 log 10 (8/π 2 )≈0.91 dB [6]. Therefore (C/N 0 ) U = (C/N 0 ) R − 3.91 dB, where (C/N 0 ) R is the BOC signal carrier-to-noise ratio.…”

Section: Analysis Of Tracking Accuracymentioning

confidence: 99%

“…Several techniques that have been reported to avoid such ambiguity include Bump-Jump (BJ) [2], 'ASPeCT' [3] , subcarrier cancellation (SCC) [4], BPSKlike tracking [1], double estimator (DE) [5], and double phase estimator (DPE) [6], etc. BJ is not effective for high-order BOC signals or multipath conditions.…”

Section: Introductionmentioning

confidence: 99%

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Unambiguous Tracking of BOC Signals Using Coherent Combination of Dual Sidebands

Tian¹,

Zhang²,

Cheng³

2016

IEEE Commun. Lett.

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The ionospheric effect breaks the correlation of carrier phases between dual sidebands of binary offset carrier (BOC) signal. Thus conventional sideband processing algorithms usually perform non-coherent combination of the dual sidebands, which degrades the tracking accuracy and sensitivity. In order to improve the accuracy, this paper proposes a computationallyeffective tracking algorithm that involves coherent combination of BOC dual sidebands. The tracking loop of the proposed algorithm includes a novel design of a subcarrier discriminator using the differential carrier phase of dual sidebands. Simulation results show that proposed algorithm achieves simultaneous high precision and low computational complexity for high-order BOC.

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“…After the loop filter processing, τ ∆sc is fed back to adjust the lower sideband carrier phase in (6). Therefore, the loop of the subcarrier phase is closed for tracking its changes.…”

Section: B Principle Of Coherent Combination Discriminatormentioning

confidence: 99%

Section: Analysis Of Tracking Accuracymentioning

confidence: 99%

See 1 more Smart Citation

Unambiguous Tracking of BOC Signals Using Coherent Combination of Dual Sidebands

Tian¹,

Zhang²,

Cheng³

2016

IEEE Commun. Lett.

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“…The SMEE of the SDPE is obtained according to the maximum and minimum subcarrier multipath errors with respect to the multipath excess phase Δ φ 1 , as defined in a previous study .

τ_{MP}^{\max} = \frac{1}{2 π f_{sc}} \arctan ((), \frac{a_{1} | \sin (2 π f_{sc} τ_{1}) | ((), 1 - \frac{LW τ_{1}}{T_{c}})}{1 + a_{1} sign [\sin (2 π f_{sc} τ_{1})] \cos (2 π f_{sc} τ_{1})}), 0 \leq τ_{1} \leq \frac{T_{c}}{LW},

τ_{MP}^{\min} = - \frac{1}{2 π f_{sc}} \arctan ((), \frac{a_{1} | \sin (2 π f_{sc} τ_{1}) | ((), 1 - \frac{LW τ_{1}}{T_{c}})}{1 - a_{1} sign [\sin (2 π f_{sc} τ_{1})] \cos (2 π f_{sc} τ_{1})}), 0 \leq τ_{1} \leq \frac{T_{c}}{LW} .

…”

Section: Strobe Double Phase Estimatormentioning

confidence: 99%

Strobe double phase estimator: a multipath mitigating technique for BOC signal in GNSS based on double phase estimator

Liu

Tang

et al. 2016

Int. J. Satell. Commun. Network.

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Summary Double phase estimator (DPE) is an unambiguous binary offset carrier (BOC) tracking algorithm for band‐limited receivers in Global Navigation Satellite Systems. Based on the strobe pulse method, the DPE was modified by introducing a strobe waveform in the prompt signal correlation process of the subcarrier phase lock loop in this paper.. This strobe DPE (SDPE) employs no additional correlators. Two different reference strobe waveforms and their receiving structures are provided. The performance of the SDPE is characterized according to the subcarrier multipath error envelope (SMEE) and the tracking jitter. Simulation results show that, relative to conventional DPE, the first waveform employed in this study provides a reduction in the SMEE area of 81.1% and 75.1% for BOC(1,1) and BOC(14,2) signal, respectively. The second waveform employed in this study provides a reduction in the SMEE area of 82.5% and 76.8% for BOC(1,1) and BOC(14,2) signal, respectively. They also both outperform the double estimator about 64.4% and 53.2% for BOC(1,1) and BOC(14,2) signal in the SMEE area. However, the SDPE experiences a loss of −6 and −7.25 dB, respectively, for two reference waveforms in terms of the post‐coherent signal‐to‐noise ratio, which impacts its tracking precision. Copyright © 2016 John Wiley & Sons, Ltd.

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“…5,6 In order to tackle this problem, some unambiguous acquisition and tracking approaches have been proposed. Among them, there are four representative solutions referred to as BPSK-like technique, 7 bump-jumping technique, 8 double-estimator technique, [9][10][11][12][13] and side-peaks cancellation technique. 14 The earliest BPSK-like idea was described as the sum of two binary BPSK signals with carrier frequency symmetrically positioned on each side of BOC carrier frequency.…”

Section: Introductionmentioning

confidence: 99%

Unambiguous and precise correlation receiver for binary offset carrier modulated signal

Zhang

Zuo

2019

Int J Communication

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Summary The binary offset carrier (BOC) modulated signal can improve the positioning accuracy and increase the multipath resistance in global navigation satellite system (GNSS), and it may cause potential ambiguity in the process of signal acquisition and code tracking. In this paper, a simple but efficient unambiguous receiver is firstly proposed for multiple side‐peaks mitigation by implementing correlation of the received BOC signal with local sine wave instead of square wave used at the transmitter. Moreover, the potential degradation of sharpness of the nonlinear correlation induced by the sine wave is well compensated by optimizing the early‐to‐late spacing. The other reason leading to ambiguity is the multipath propagation, so we further propose a maximum likelihood (ML) estimator with Newton iteration method, where the received GNSS signal is modeled via the line‐of‐sight (LOS) component and the first‐arrived non‐line‐of‐sight (NLOS) component. Finally, the analytical expression of multipath propagation Cramer‐Rao bound is derived for the designed ML estimator. Simulation results indicate that compared with the conventional BOC modulation, the proposed sine wave receiver can achieve unambiguous and more precise code tracking performance and thus turns out to be more robust to multipath propagation.

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Double phase estimator: new unambiguous binary offset carrier tracking algorithm

Cited by 48 publications

References 19 publications

Unambiguous Tracking of BOC Signals Using Coherent Combination of Dual Sidebands

Unambiguous Tracking of BOC Signals Using Coherent Combination of Dual Sidebands

Strobe double phase estimator: a multipath mitigating technique for BOC signal in GNSS based on double phase estimator

Unambiguous and precise correlation receiver for binary offset carrier modulated signal

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