Channel Estimation and LDPC Code Puncturing Schemes Based on Incremental Pilots for OFDM

ETRI Journal

关键词: incremental pilots;    low-density parity-check (LDPC) code;    Channel estimation;   

Others  :  1185921
DOI  :  10.4218/etrij.10.0210.0101

【 摘 要 】

In this letter, we propose a channel estimation algorithm based on incremental pilots. These are pilots additionally inserted after puncturing the modulated orthogonal frequency division multiplexing (OFDM) symbols to enhance channel estimation performance without lowering bandwidth efficiency. A low-density parity-check code puncturing scheme is also proposed to prevent the performance degradation due to the codeword bit loss caused by punctured OFDM symbols.

   

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