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- W2152940704 abstract "Due to the reuse factor reduction, the attendant increase in co-channel interference (CCI) becomes the limiting factor in the performance of the orthogonal frequency division multiplexing (OFDM) based cellular systems. In the previous work, we proposed the least mean square-blind joint maximum likelihood sequence estimation (LMS-BJMLSE) algorithm, which is effective for CCI cancellation in OFDM systems with only one receive antenna. However, LMS-BJMLSE requires a long training sequence (TS) for channel estimation, which reduces the transmission efficiency. In this paper, we propose a subcarrier identification and interpolation algorithm, in which the subcarriers are divided into groups based on the coherence bandwidth, and the slowest converging subcarrier in each group is identified by exploiting the correlation between the mean-square error (MSE) produced by LMS and the mean-square deviation (MSD) of the desired channel estimate. The identified poor channel estimate is replaced by the interpolation result using the adjacent subcarriers' channel estimates. Simulation results demonstrate that the proposed algorithm can reduce the required training sequence dramatically for both the cases of single interference and dual interference. We also generalize LMS-BJMLSE from single antenna to receiver diversity, which is shown to provide a huge improvement." @default.
- W2152940704 created "2016-06-24" @default.
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- W2152940704 date "2011-01-01" @default.
- W2152940704 modified "2023-10-18" @default.
- W2152940704 title "Training Sequence Reduction for the Least Mean Square-Blind Joint Maximum Likelihood Sequence Estimation Co-channel Interference Cancellation Algorithm in OFDM Systems" @default.
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- W2152940704 doi "https://doi.org/10.1587/transfun.e94.a.1173" @default.
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