A study on LDPC coded hybrid-ARQ using spatially multiplexed MIMO-OFDM
نویسندگان
چکیده
In this paper, we consider the Type-II Hybrid ARQ schemes with the LDPC codes having the rate of 0.5 through MIMO-OFDM Spatial Multiplexing (SM) schemes for high speed and high throughput transmission. MMSE nulling and MLD are used for the signal separation and detection method in SM. We also have used the channel estimation per subcarrier with MMSE criterion. The uncoded Hybrid ARQ schemes with the bit-LLR based packet combining have also been investigated. Keyword LDPC code , MIMO-OFDM , MLD , HybridARQ,bit-LLR,MMSE channel estimation
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Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University 05 Aza-Aoba, Aramaki, Aoba-ku, Sendai, 980-8579 Japan E-mail: †{nakajima, deep}@mobile.ecei.tohoku.ac.jp, ‡[email protected] Abstract Recently, Multi-Input Multi-Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) are gaining much attention for very high speed data communi...
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