【摘 要】
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Dear editor,rnOrthogonal frequency division multiplexing (OFDM) has been adopted in new radio (NR)[1],and multiple-port de-modulation reference signal (DMRS) has been designed to achieve channel estimation.In NR,two ports of DMRS share the same frequency
【机 构】
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School of Electronic and Electrical Engineering,Wuhan Textile University,Wuhan 430200,China;Departme
论文部分内容阅读
Dear editor,rnOrthogonal frequency division multiplexing (OFDM) has been adopted in new radio (NR)[1],and multiple-port de-modulation reference signal (DMRS) has been designed to achieve channel estimation.In NR,two ports of DMRS share the same frequency resource elements (RE) by em-ploying an orthogonal code comprising cyclic shift phase.In general,channel estimation can be achieved via the classical discrete Fourier transform (DFT) scheme[2,3]as channels for the two ports of DMRS can be separated in the time do-main via the DFT scheme.In[4],it has been shown that the minimum mean square error (MMSE) estimator is robust to correlation matrix mismatch;this makes the MMSE estima-tor more practical.In general,little is known about utilizing the MMSE metric for channel estimation of two-port DMRS in NR.
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