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Effects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay-Based Networks
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| A practical multiuser cooperative transmission scheme denoted as Virtual Maximum Ratio Transmission (VMRT) for multiple-input multiple-output-orthogonal frequency division multiple access (MIMO-OFDMA) relay-based networks is proposed and evaluated in the presence of a realistic channel estimation algorithm and using low-density parity-check (LDPC) codes. It is shown that this scheme is robust against channel estimation errors. It offers diversity and array gain, keeping the complexity low with a multiuser and multiantenna channel estimation algorithm that is simple and efficient. In addition, the combination with LDPC codes provides improved gains; diversity gains larger than 6dB can be easily obtained with a reduced number of relays. Thus, this scheme can be used to extend coverage or increase system throughput by using simple cooperative OFDMA-based relays. | 605.94 KB | Adobe PDF |
Orientador(es)
Resumo(s)
A practical multiuser cooperative transmission scheme denoted as Virtual Maximum Ratio Transmission (VMRT) for multiple-input multiple-output-orthogonal frequency division multiple access (MIMO-OFDMA) relay-based networks is proposed and evaluated in the presence of a realistic channel estimation algorithm and using low-density parity-check (LDPC) codes. It is shown that this scheme is robust against channel estimation errors. It offers diversity and array gain, keeping the complexity low with a multiuser and multiantenna channel estimation algorithm that is simple and efficient. In addition, the combination with LDPC codes provides improved gains; diversity gains larger than 6dB can be easily obtained with a reduced number of relays. Thus, this scheme can be used to extend coverage or increase system throughput by using simple cooperative OFDMA-based relays.
Descrição
Palavras-chave
Orthogonal Frequency Division Multiplex Channel Estimation Channel State Information Orthogonal Frequency Division Multiple Access LDPC Code
Contexto Educativo
Citação
Gil Jiménez, V.P., Ribeiro, C., Gameiro, A. et al. Effects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay-Based Networks. J Wireless Com Network 2010, 764784 (2010). https://doi.org/10.1155/2010/764784.
Editora
Springer Nature