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arXiv 2402.10318cs.ITeess.SPmath.IT
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面向带内移键控的多天线技术

Multi-Antenna Towards Inband Shift Keying

Ralf R. Müller

AI总结:

针对多天线通信中链路预算受限和波束对准难题,提出结合恒包络调频、低速率重复编码与差分预编码的连续相位频移键控,支持利用加窗FFT进行简便相干解调。

摘要:

我们提出一种新型连续相位频移键控,特别适用于链路预算紧张且波束对准存在困难的多天线通信。该方案将调频的恒包络特性与低速率重复编码相结合,以弥补发射波束成形的缺失。尽管它属于调频,但其发射信号呈现接近矩形的频谱形状。与GSM的高斯最小频移键控类似,当结合差分预编码时,它可由线性调制良好近似,从而能够通过加窗快速傅里叶变换实现简便的相干解调。

英文摘要:

We propose a new continuous phase frequency shift keying that is particularly suited for multi-antenna communications when the link budget is critical and beam alignment is problematic. It combines the constant envelope of frequency modulation with low-rate repetition coding in order to compensate for the absence of transmit beamforming. Although it is a frequency modulation, its transmit signal shows close to rectangular spectral shape. Similar to GSM's Gaussian minimum shift keying, it can be well approximated by linear modulation, when combined with differential precoding. This allows for easy coherent demodulation by means of a windowed fast Fourier transform.

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