Avaliação da Eficiência Espectral Média para o Enlace Reverso de Redes Celulares na Presença de Interferência de Co-canal

Olivo, Edgar Eduardo Benítez; Almeida, Celso de

doi:10.14209/sbrt.2011.136

Cited by 3 publications

(2 citation statements)

References 7 publications

(8 reference statements)

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“…Therefore, a multicell scenario should be considered in this type of studies. A different approach to calculate this cellular spectral efficiency is employed in [40,41], where a target BER (maximum BER) is required by a communication service. Thus, this approach is interesting to evaluate the cellular spectral efficiency of the opportunistic system in cellular environments and with this analysis, parameters that maximize the cellular spectral efficiency are obtained.…”

Section: Related Work and Motivationmentioning

confidence: 99%

Bit error rate and spectral efficiency analysis of opportunistic wireless systems

Garzón¹

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Different opportunistic transmission techniques were proposed for wireless communication systems. In this work, we explore the opportunistic technique in which the transmissions are made only when the fading is above a threshold. As result, this technique mitigates almost completely the undesirable effects produced by the fading channel.Seeking to potentialize the performance of the aforementioned opportunistic technique and aiming to analyze it in different scenarios, in this work different hybrid schemes combining opportunism with other transmission/reception techniques are proposed, modeled and analyzed. In particular, the opportunistic technique is combined with two different diversity schemes. Spatial diversity (or antenna array diversity) with maximal ratio combining (MRC) is firstly considered. Then, by assuming a multiuser scenario, the multiuser diversity technique is also employed with opportunistic transmission.As wireless communication systems typically employ error correcting codes, in this work opportunistic transmission with error correcting codes are employed. Specifically, convolutional codes and trellis coded modulation (TCM) are chosen in the analysis, once closed-form expressions to evaluate the bit error rate (BER) can be obtained.Later, an opportunistic code division multiple access (CDMA) is proposed. Thus, the performance of opportunistic transmission in environments with presence of own-cell interference (or multiple access interference -MAI) and co-cell interference (CCI) are evaluated. Therein, the uplink is analyzed and aspects as the channel reuse factor are considered in the analysis.Finally, by considering the opportunistic cellular system, the cellular spectral efficiency is evaluated. For this, an procedure to calculate the cell coverage radius for each modulation scheme is employed, by considering that adaptive modulation is used and that a target mean BER must be guaranteed.In general, BER and the spectral efficiency are performance indicators considered in this work to evaluate the proposed schemes. As result, closed-form expressions are derived and their accuracy are validated by employing Monte Carlos simulations. In the analysis, BPSK, QPSK and M-QAM modulations are considered. Moreover, additive white Gaussian noise (AWGN) and Rayleigh fading are assumed in the channel model.The results show that the derived expressions are highly accurate to model the performance of the proposed schemes. In addition, it is determined that the hybrid schemes improves the performance in relation to opportunistic systems.

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Section: Related Work and Motivationmentioning

confidence: 99%

Bit error rate and spectral efficiency analysis of opportunistic wireless systems

Garzón¹

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“…Therefore, the whole cellular scenario should be considered in this analysis. A mechanism to calculate the so called cellular spectral efficiency has been employed in [19,65].…”

Section: Related Work and Motivationmentioning

confidence: 99%

Bit error rate and spectral efficiency evaluation of MC-CDMA cellular systems employing multiuser detection

Mora¹

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I would also like to thank my parents, Nancy and Jorge, because with their love, selfdenial, sacrifice and example, they help me and support me when I make mistakes, they advise me when I doubt, and when I need them, they are always by my side.I would like to express my gratitude to Prof. Dr. Celso de Almeida, for his support, patience, and encouragement throughout my graduate studies. To him I owe moments of kind dedication and guidance during the development of this work. His technical and editorial advice was essential to the completion of this dissertation and he has taught me innumerable lessons and insights on the workings of academic research and life in general.My thanks also go to the members of my dissertation committee, Prof.

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Analytical performance of digital terrestrial television transmitter stations for mobile broadcasting using ISDB-T standard over AWGN and fading channel

Martinez

Olmedo

Paredes

2017

2017 IEEE Colombian Conference on Communications and Computing (COLCOM)

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Avaliação da Eficiência Espectral Média para o Enlace Reverso de Redes Celulares na Presença de Interferência de Co-canal

Cited by 3 publications

References 7 publications

Bit error rate and spectral efficiency analysis of opportunistic wireless systems

Bit error rate and spectral efficiency analysis of opportunistic wireless systems

Bit error rate and spectral efficiency evaluation of MC-CDMA cellular systems employing multiuser detection

Analytical performance of digital terrestrial television transmitter stations for mobile broadcasting using ISDB-T standard over AWGN and fading channel

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