Novel Maximum-Based Timing Acquisition for Spread-Spectrum Communications

Sibbett, Taylor; Moradi, Hussein; Farhang‐Boroujeny, Behrouz

doi:10.1109/glocomw.2016.7848972

Cited by 6 publications

(8 citation statements)

References 17 publications

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“…Here, we explore the associated probabilities when the threshold is chosen according to the Neyman-Pearson criterion. We also note that, in the presence of the signal, the maximum sample within each symbol period is the sufficient statistic for signal presence, [9].…”

Section: Probabilitiesmentioning

confidence: 97%

“…The chance of choosing a timing that belongs to state S 0 remains low. It may be further noted that a property of FMT-SS that distinguishes it from other spread spectrum systems and, thus, is valuable here, is the fact that FMT-SS performance is invariant to any small drift of timing phase [9]. Because of this property, any acquired timing phase that belongs to states S 1 and S 2 should be considered as a successful acquisition.…”

Section: A Neyman-pearson Criterionmentioning

confidence: 99%

“…In the past several years, our team has looked into the application and realization of a filter bank multicarrier spread spectrum (FB-MC-SS) system to form an underlay channel for communicating spectral information among node members in a dynamic spectrum access system/cognitive radio network, [7]- [9]. This underlay channel setup which we refer to as an underlay control/communication channel (UCC) transmits information in data packets.…”

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confidence: 99%

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Normalized Matched Filter for Blind Interference Suppression in Filter Bank Multicarrier Spread Spectrum Systems

2022

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This paper proposes and analyzes a modification to the standard matched filtering operation utilized in filter-bank multicarrier spread spectrum (FB-MC-SS) communications. This modification suppresses the impact of partial-band interferers without a priori knowledge of their location within the band of transmission and/or their power characteristics. A performance analysis of the proposed matched filter, which indicates its usefulness in environments where interference is likely to be experienced, is presented. It is shown that whereas the standard matched filter proves to be ineffective for packet detection and timing acquisition in such harsh environments, the modified matched filter successfully removes the harmful effects of interferers. This is found to be a unique feature of FB-MC-SS which is non-existent in other alternative spread spectrum methods.

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Section: Probabilitiesmentioning

confidence: 97%

Section: A Neyman-pearson Criterionmentioning

confidence: 99%

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confidence: 99%

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Normalized Matched Filter for Blind Interference Suppression in Filter Bank Multicarrier Spread Spectrum Systems

2022

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“…1,2 With respect to timing synchronization, it is also noted that the receiver local spreading code timing alignment capability depends on the signaling waveforms features. [16][17][18] Signal design under various constraints was discussed in Landolsi 19 where full-and partial-response waveforms were proposed for the maximization of timing acquisition probability and in Giunta et al 20 where constrained optimization for noncoherent acquisition of DS-SS signals was based on generalized Q-functions. 2,3 As such, several previous works explored various aspects of signal design for the purpose of improving receiver synchronization.…”

Section: Introductionmentioning

confidence: 99%

“…14,15 Acquisition performance enhancement algorithms were also introduced for binary offset carrier signaling schemes used in GNSS. [16][17][18] Signal design under various constraints was discussed in Landolsi 19 where full-and partial-response waveforms were proposed for the maximization of timing acquisition probability and in Giunta et al 20 where constrained optimization for noncoherent acquisition of DS-SS signals was based on generalized Q-functions. Acquisition schemes were also devised for band-limited spread-spectrum signals in previous studies.…”

Section: Introductionmentioning

confidence: 99%

Novel signals for optimized timing synchronization in direct‐sequence spread‐spectrum communication systems

Landolsi

2018

Int J Communication

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The paper presents design techniques for novel signaling waveforms to optimize timing synchronization in direct-sequence spread-spectrum communication systems. Both coarse code timing acquisition and fine delay-locked loop tracking systems are considered, and their performance metrics are analyzed in terms of initial acquisition detection probability and residual tracking jitter, showing a strong dependency on signal waveform spectral characteristics. Bit error performance under imperfect synchronization is also assessed. A design methodology is formulated with a low complexity parametric optimization approach based on prolate spheroidal waveform expansions for the generation of signals that minimize the probability of acquisition miss and tracking error jitter subject to additional constraints on signal energy and phase transitions. Novel optimized waveforms are synthesized with different levels of effective root mean square bandwidth occupancy and compared with conventional pulses to illustrate their advantages. Performance trade-offs are demonstrated between the acquisition and tracking systems, whereby signals with low effective bandwidth are found to have better acquisition capability at the expense of poorer tracking jitter, while the converse holds for signals with higher effective bandwidth. It is found that an effective root mean square bandwidth occupancy in the range of 40% to 50% of the chip rate can achieve a good compromise between the requirements of the 2 code timing synchronization phases. Numerical results are presented to quantify the relative merits of representative waveforms with respect to the different performance measures in terms of acquisition capability, tracking jitter, and bit error probability.

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