Cooperative Space-Time Coded OFDM with Timing Errors and Carrier Frequency Offsets

Sanchez, Fernando; Zemen, Thomas; Matz, Gerald; Kaltenberger, Florian; Czink, Nicolai

doi:10.1109/icc.2011.5962973

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…The performance can often only be maintained if the CFO is comparably low [5], [6] or significantly increased computational effort is required [7]. Some mitigation techniques require an extended overhead [8] or are limited to a specific, rather low number of transmitters [7], [9]. Within this paper, we propose an effective equalizer structure which facilitates cooperative communication that…”

Section: Criticality Of Carrier Frequency Offsetmentioning

confidence: 99%

Multi-Carrier (OFDM) Cooperative Transmission in MANETs with Multiple Carrier Frequency Offsets

Yuksel

Rolny²,

Kuhn

et al. 2022

2022 18th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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Cooperative transmission, realized by aggregating several nodes to a virtual multiple input system, is an auspicious approach to establish a more robust and effective communication in MANETs. In such a setup, impairments, i. e. multiple timing and carrier frequency offsets (TO, CFO) will occur. While multi-carrier schemes, e. g. Orthogonal Frequency Division Multiplexing (OFDM), are well-known to mitigate the impact of multipath propagation and TO, multiple CFO causes inter-carrier-interference (ICI) which typically degrades the performance significantly. Within this paper, we propose an effective code and equalizer structure that allows to overcome this limitation. It mitigates the impact of multiple CFO that can be significantly larger than the subcarrier spacing with a reasonable computational effort. For that, we utilize inherent code properties of Linear-Scalable Dispersion Codes (LSDCs) and propose a communication system composed of an equalizer structure in combination with LSDCs that enables multi-carrier distributed cooperative transmission for practical MANETs with high node mobility. We demonstrate the benefits of cooperative transmission in comparison to classical non-cooperative multihop or concurrent transmission by outage simulations, which clearly indicate that our proposal can be of crucial importance for the overall MANET scalability. Lastly, we compare our OFDM system with a recently proposed time-domain equalization singlecarrier system and point out use cases, where the OFDM system can be more advantageous.

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Section: Criticality Of Carrier Frequency Offsetmentioning

confidence: 99%

Multi-Carrier (OFDM) Cooperative Transmission in MANETs with Multiple Carrier Frequency Offsets

Yuksel

Rolny²,

Kuhn

et al. 2022

2022 18th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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“…To achieve phase-coherent DL transmission, carrier frequency, sample time and phase must be accurately synchronized. Often, these issues are jointly estimated and compensated [25], sometimes also combined with channel estimation [15]. In [26], Nasir et al provides an overview of timing and carrier synchronization algorithms, both for singleantenna, and for co-located and distributed MIMO systems.…”

Section: B Digital Synchronization and Impairment Mitigation Techniqmentioning

confidence: 99%

Implementation Challenges and Opportunities in Beyond-5G and 6G Communication

Gustavsson

Frenger²,

Fager³

et al. 2021

IEEE J. Microw.

111

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“…Table XVI summarizes the research carried out to achieve timing and carrier synchronization in distributed multiuser communication systems. All listed papers [361,362,363,364] consider multi-carrier communication. Carrier synchronization alone is studied by [361].…”

Section: E Distributed Multiuser Communication Systemsmentioning

confidence: 99%

“…Carrier synchronization alone is studied by [361]. The joint timing and carrier synchronization is proposed in [362,363,364], where joint estimation and compensation design is considered by [363] and only compensation of timing and carrier frequency offsets is studied in [362,364]. Different from [362], [364] also considers joint channel estimation.…”

Section: E Distributed Multiuser Communication Systemsmentioning

confidence: 99%

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

Nasir

Durrani

Mehrpouyan

et al. 2016

J Wireless Com Network

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Timing and carrier synchronization is a fundamental requirement for any wireless communication system to work properly. Timing synchronization is the process by which a receiver node determines the correct instants of time at which to sample the incoming signal. Carrier synchronization is the process by which a receiver adapts the frequency and phase of its local carrier oscillator with those of the received signal. In this paper, we survey the literature over the last 5 years (2010)(2011)(2012)(2013)(2014) and present a comprehensive literature review and classification of the recent research progress in achieving timing and carrier synchronization in single-input single-output (SISO), multiple-input multiple-output (MIMO), cooperative relaying, and multiuser/multicell interference networks. Considering both single-carrier and multi-carrier communication systems, we survey and categorize the timing and carrier synchronization techniques proposed for the different communication systems focusing on the system model assumptions for synchronization, the synchronization challenges, and the state-of-the-art synchronization solutions and their limitations. Finally, we envision some future research directions.

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Cooperative Space-Time Coded OFDM with Timing Errors and Carrier Frequency Offsets

Cited by 6 publications

References 9 publications

Multi-Carrier (OFDM) Cooperative Transmission in MANETs with Multiple Carrier Frequency Offsets

Multi-Carrier (OFDM) Cooperative Transmission in MANETs with Multiple Carrier Frequency Offsets

Implementation Challenges and Opportunities in Beyond-5G and 6G Communication

Timing and carrier synchronization in wireless communication systems: a survey and classification of research in the last 5 years

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