Hybrid DS-FH packet acquisition for frequency hopped random multiple access

Sakr, Mohamed; Al-Moghazy, A.; Abou-Bakr, H.; Fikri, M.

doi:10.1109/jec-ecc.2012.6186971

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…In this case, the nodes can perform their transmission at any randomly chosen time and frequency. To the best of our knowledge, only few recent works considered a random access protocol based simultaneously on both time and frequency selection [9]- [12]. However, all these works focused on a discrete set of frequencies which may be compared to our DR-FDMA approach.…”

Section: Introductionmentioning

confidence: 99%

On the benefits of random FDMA schemes in ultra narrow band networks

Goursaud

Gorce

2014

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)

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Ultra narrow band transmission (UNB) systems have already been deployed and have proved to be ultra-efficient for point-to-point communications. This paper presents this technology and gives some insights on the scalability of UNB for a multi-point to point network. This configuration corresponds to an uplink scenario where multiple nodes compete to send their packets, with neither coordination nor feedback from the sink. In particular, we present and analyze two multiple access schemes based on random frequency selection: discrete random FDMA (DR-FDMA) and the new continuous random FDMA (CR-FDMA). An ideal system where the carrier frequencies are exactly obtained is first considered and extended to a more realistic case, with rough carrier frequencies. We analyze the system performance in terms of bit error rate and outage probability. The presented results clearly show that, even if in the ideal case, the DR-FDMA scheme outperforms the CR-FDMA scheme; in the realistic case, both schemes lead to similar performance. Thus, this paper highlights the fact that the use of CR-FDMA is very relevant in a realistic network as it bypasses the need of an accurate carrier frequency control, and thus permits the use of even the cheapest transmitters without loss of performance.

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Section: Introductionmentioning

confidence: 99%

On the benefits of random FDMA schemes in ultra narrow band networks

Goursaud

Gorce

2014

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)

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A Rapid Serial Timing Acquisition Algorithm for Hybrid DS/FFH Packet Radio Communication

Kim

Lim

2021

IEEE Trans. Aerosp. Electron. Syst.

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Joint interference estimation and cancellation for coherent frequency hopping multiple-access systems

Ren

et al. 2016

J Wireless Com Network

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In this paper, we propose an iterative detection algorithm that reconstructs and cancels the multiple-access interference jointly without the knowledge of hopping patterns of the interfering users for SFH/BPSK systems in an ad hoc scenario. Since users are asynchronous in this scenario, signal in one hop of the desired users is affected by partial signals in unaligned hops, called the interference fragments, of the interfering users. We address the interference model by defining a virtual user, which has the same hopping pattern as that of the desired user and contains the feature of the interfering fragments. Then, we derive the joint interference reconstruction and multiple-user detection (MUD) algorithm using the factor graph framework. Simulation results show that the performance of the proposed algorithm can be improved by up to 2 dB than that of the traditional single user detection (SUD) in AWGN at the packet error rate of 10 −2 for a total of 8 users over 20 hopping frequencies, and an outstanding performance may also be achieved in the channel with Doppler.

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Hybrid DS-FH packet acquisition for frequency hopped random multiple access

Cited by 3 publications

References 7 publications

On the benefits of random FDMA schemes in ultra narrow band networks

On the benefits of random FDMA schemes in ultra narrow band networks

A Rapid Serial Timing Acquisition Algorithm for Hybrid DS/FFH Packet Radio Communication

Joint interference estimation and cancellation for coherent frequency hopping multiple-access systems

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