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Two Dimensional Adaptive Multichannel Decision Feedback Equalization for OTFS System
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DOI：10.1109/LCOMM.2020.3039982.png)
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摘要
En 中文
Orthogonal time-frequency-space (OTFS) modulation has shown significant error performance advantages over orthogonal frequency division multiplexing (OFDM) in time-varying channels. However, the symbols in OTFS frames still suffer from inter-Doppler interference (IDI) and inter-symbol interference (ISI). In this letter, we propose a two dimensional (2D) adaptive multichannel decision feedback equalizer (DFE) to combat the interference. The proposed receiver constructs the input signal and feedback signal of the DFE based on the characteristic of OTFS modulation. Meanwhile, by exploiting the sparsity feature of the channels in delay-Doppler domain, the iterative improved proportionate normalized least mean squares (IPNLMS) algorithm is employed to achieve fast convergence and fast tracking. The simulation results show that the proposed equalizer could achieve satisfied BER performance with lower complexity.
Keyword:
Receivers
Decision feedback equalizers
Complexity theory
Delays
Two dimensional displays
Modulation
Channel estimation
OTFS
two dimensional
adaptive multichannel decision feedback equalization
IPNLMS
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期刊
IF:
4.4
论文数:
1.3W
被引数:
2.2W
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