Faster-Than-Nyquist Signaling with Differential Encoding and Non Coherent Detection
Faster-Than-Nyquist Signaling with Differential Encoding and Non Coherent Detection
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DOI：
10.1109/icassp.2018.8462455
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发表时间：
2018-04
期刊：
影响因子：
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通讯作者：
T. Ishihara;S. Sugiura
中科院分区：
文献类型：
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作者：
T. Ishihara;S. Sugiura
在本文中，我们提出了一种新的差分比奈奎斯特(DFTN)信令方案，它允许我们在接收端省去任何信道估计，同时受益于比奈奎斯特(FTN)信令的速率提升。在发射机处，差分调制的二进制相移键控(DBPSK)码元以小于奈奎斯特准则定义的码元间隔的码元间隔进行传输。由于受到FTN特有的码间干扰(ISI)的影响，接收机基于频域均衡对DBPSK符号进行非相干估计。这是能够实现的，因为FTN专用LSI是确定性的，通过假设FTN的码元打包比和整形滤波器的滚降系数在接收器处预先已知。
In this paper, we propose a novel differential faster-than-Nyquist (DFTN) signaling scheme, which allows us to dispense with any channel estimation at the receiver while benefiting from the rate boost of faster-than-Nyquist (FTN) signaling. At the transmitter, differentially modulated binary phase-shift keying (DBPSK) symbols are transmitted with the symbol interval that is smaller than that defined by the Nyquist criterion. The receiver noncoherently estimates the DBPSK symbols, suffering from the effects of FTN-specific inter-symbol interference (ISI), based on frequency-domain equalization. This is enabled, because FTN-specific lSI is deterministic, by assuming that the FTN's symbol packing ratio and the roll-off factor of a shaping filter are known in advance at the receiver.