Carrier frequency recovery for a fully digital direct-sequence spread-spectrum receiver: A comparison

Mauss, O.C.; Classen, F.; Meyr, H.

doi:10.1109/vetec.1993.507494

Cited by 10 publications

(17 citation statements)

References 7 publications

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“…This is a well known problem and usual solution is the correlator or the matched filter receiver that have several implementation alternatives, either in a serial, parallel or one shot form. However, a large CFO is a problem like shown, e.g., in [10]. This effect is illustrated in the Fig.…”

Section: Pss Detectionmentioning

confidence: 83%

“…It can be seen that detectability drops below the target level when CFO is 15 kHz or larger and almost totally fails soon after this limit as the theory predicts. As a rule of thumb, the loss is 1 dB and 2 dB if F T = 0.25 and F T = 0.35, respectively, where F is the CFO and T the integration time (PSS code duration herein) [10]. Moreover, higher SNR means that more losses can be tolerated.…”

Section: Pss Detectionmentioning

confidence: 99%

“…In principle, such a one shot receiver contains parallel correlators or matched filters each matched to different candidate CFO. The separation of these candidates could be based on results in [10]. The rule of thumb is such that the separation should be such that in between the candidates the SNR loss (and detection sensitivity therefore) does not drop too much.…”

Section: Pss Detectionmentioning

confidence: 99%

“…Since there are several parallel DMRS symbols (at every fourth subcarrier) averaging in the frequency domain is possible. This is the well known data aided feed forward frequency estimator whose theoretical limit is also known [10].…”

Section: Cfo Estimationmentioning

confidence: 99%

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5G New Radio Over Satellite Links: Synchronization Block Processing

Saarnisaari

Houssin

Deleu

2019

2019 European Conference on Networks and Communications (EuCNC)

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Harmonization of terrestrial standards such that they would support satellite elements would offer several benefits. This work has started at 3GPP relating to 5G new radio (NR). Downlink initial access is one of the topics that has to be evaluated in this respect among many others. This paper studies detection of the synchronization signals included in the synchronization (SS) block of the 5G NR signal in satellite channels that have large, up to 720 kHz, Doppler frequency shift at 30 GHz carrier frequency. Furthermore, the reception of system information data in the SS block is considered. It is shown that using dedicated large frequency shift aware detectors it is possible to meet the 5G NR requirements in the detection part. However, the data part cannot be reliably received using one-shot reception at low signalto-noise values. Some alternative solutions are considered and evaluated though some of them require changes to the standard in order to be efficient.

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Section: Pss Detectionmentioning

confidence: 83%

Section: Pss Detectionmentioning

confidence: 99%

Section: Pss Detectionmentioning

confidence: 99%

Section: Cfo Estimationmentioning

confidence: 99%

See 2 more Smart Citations

5G New Radio Over Satellite Links: Synchronization Block Processing

Saarnisaari

Houssin

Deleu

2019

2019 European Conference on Networks and Communications (EuCNC)

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“…Let F denote the CFO. It is known that the detection sensitivity starts to drop once FT > 0.1 and signal-to-noise ratio (SNR) loss is 2 dB if FT = 0.35 [3]. In OFDM systems, FT = 1 if CFO is equal to the SCS such that sensitivity losses start to occur once CFO is 20 -30 % of the SCS.…”

Section: Initial Accessmentioning

confidence: 99%

5G NR over Satellite Links: Evaluation of Synchronization and Random Access Processes

Saarnisaari

Lima

2019

2019 21st International Conference on Transparent Optical Networks (ICTON)

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Integration of 5G new radio (NR) access interface with satellite technology is an ongoing task in the standardization bodies. Since 5G NR was originally designed as a terrestrial system, its direct suitability to satellite communications has yet to be carefully evaluated. In that regard, the initial synchronization and random access processes are among the topics of particular interest. This paper overviews these key processes by first identifying problematic points and then proposing feasible solutions. It is shown that initial synchronization and related data demodulation of the 5G NR synchronization block is possible using dedicated large frequency shift aware receivers. In addition, it is shown that timing advance value, which is a part of the random access process, has to be extended to cover satellite delays. A few ways to do this are discussed in the paper, as well as ways to reduce capacity loss due to required large guard interval of the 5G NR random access signal.

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New AFC algorithm for a fully-digital MDPSK DS/CDMA receiver

Lei¹

ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196)

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A new AFC algorithm is presented in this paper for correcting the sizable carrier frequency offset of a fully-digital MDPSK DSXDMA receiver, which explores the power degradation at the correlator output and has an acquisition range of twice the symbol rate. To achieve fast frequency acquisition, the momentum steepest descent method and modified S-curve are employed in the algorithm. The simplicity of the algorithm makes it desirable for VLSI implementation. The performance of the proposed algorithm is also evaluated, and is compared with the Cramer-Rao bound and the results of other algorithms available in the literature.

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Carrier frequency recovery for a fully digital direct-sequence spread-spectrum receiver: A comparison

Cited by 10 publications

References 7 publications

5G New Radio Over Satellite Links: Synchronization Block Processing

5G New Radio Over Satellite Links: Synchronization Block Processing

5G NR over Satellite Links: Evaluation of Synchronization and Random Access Processes

New AFC algorithm for a fully-digital MDPSK DS/CDMA receiver

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