Performance analysis of LTE downlink under Symbol Timing Offset

Wang, Qi; Šimko, Michal; Rupp, Markus

doi:10.1109/wsa.2012.6181235

Cited by 8 publications

(2 citation statements)

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“…The structure of the utilized Vienna LTE Link Level simulator is shown in Figure 7. Note that the simulator performs all routines according to the standard [10] and it includes blocks like frequency offset compensation [18], timing offset compensation [19], channel estimation [13], and more. Table 3 presents the most important simulator settings.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Optimal pilot symbol power allocation under time-variant channels

Šimko¹,

Wang²,

Rupp³

2012

J Wireless Com Network

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Nowadays, most wireless communication systems employ coherent demodulation on the receiver side. Under this circumstance, part of the available transmission resource is reserved and utilized for channel estimation, referred to as pilot symbols. In recent standards, for example long-term evolution (LTE), a certain adjustment is allowed for the power radiated on the pilot symbols. This additional degree of freedom creates space for a further optimization of the system performance. In this article, we consider an orthogonal frequency division multiplexing system and investigate how to distribute the available power between data symbols and pilot symbols under transmissions over time-variant channels so that the overall throughput is maximized. We choose the post-equalization signal-to-interference and noise ratio as the cost function and solve the problem analytically. Simulation results obtained by the Vienna LTE simulator are consistent with the analytical results. With an optimal power distribution between data and pilot symbols, a throughput increase of around 10% can be achieved compared to a system with evenly distributed power between data and pilot symbols.

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Section: Simulation Resultsmentioning

confidence: 99%

“…As a cost function, we choose the postequalization SINR in Equation (19). Although the provided results are shown in the context of the current LTE standard, the presented concept can be applied to any MIMO OFDM-based system.…”

Section: Power Allocationmentioning

confidence: 99%

Optimal pilot symbol power allocation under time-variant channels

Šimko¹,

Wang²,

Rupp³

2012

J Wireless Com Network

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Pushing the Limits of LTE: A Survey on Research Enhancing the Standard

Schwarz¹,

Ikuno²,

Šimko³

et al. 2013

IEEE Access

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Cellular networks are an essential part of todays communication infrastructure. The ever-increasing demand for higher data-rates calls for a close cooperation between researchers and industry/standardization experts which hardly exists in practice. In this article we give an overview about our efforts in trying to bridge this gap. Our research group provides a standard-compliant open-source simulation platform for 3GPP LTE that enables reproducible research in a well-defined environment. We demonstrate that much innovative research under the confined framework of a real-world standard is still possible, sometimes even encouraged. With examplary samples of our research work we investigate on the potential of several important research areas under typical practical conditions.Comment: The final version of the manuscript is available at: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6514821&isnumber=633654

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