Unique Word Based Frequency Domain Equalization with Noise Prediction

作者：Tran Le Nam^*; Hong Een Kee

来源：IEEE Communications Letters, 2008, 12(10): 785-787.

DOI：10.1109/LCOMM.2008.080061

• Frequency domain equalization
• noise prediction
• decision feedback equalization
• unique word

Recently, the frequency domain equalization with time domain noise prediction (FDE-NP) has been proposed as an alternative to hybrid decision feedback equalization (HDFE). The current FDE-NP structures use the cyclic prefix (CP) extension (FDE-NP-CP). However, the unknown nature of CP degrades the performance of FDE-NP due to error propagation. This letter proposes a unique word (UW) based FDE-NP (FDE-NP-UW) that can yield better performance. Both optimal and suboptimal designs of the FDE-NP-UW are presented. We observe that the optimal FDE-NP-UW provides a performance gain of about 1.5 dB over the FDE-NP-CP, and about 0.5 dB over the suboptimal design at a BER of 10(-3).

• 出版日期2008-10