CPC H04L 1/0668 (2013.01) [H04L 5/0048 (2013.01); H04L 27/2613 (2013.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 72/23 (2023.01)] | 20 Claims |
1. A communications apparatus, comprising:
a transceiver to
receive a demodulation reference signal (DMRS) mapped to a first DMRS port and a second DMRS port, wherein the DMRS occupies at least one first resource element (RE) pair, and in DMRS modulation symbols carried by each first RE pair, a modulation symbol mapped to the second DMRS port is obtained by performing Alamouti coding on a modulation symbol mapped to the first DMRS port, and
receive data mapped to a first data port and a second data port, wherein the data occupies at least one second RE pair, and in data modulation symbols carried by each second RE pair, a modulation symbol mapped to the second data port is obtained by performing Alamouti coding on a modulation symbol mapped to the first data port, wherein a plurality of REs in the first RE pair and the second RE pair occupy different subcarriers or occupy different symbols; and
a processor to demodulate the data based on the DMRS to obtain an estimate of the data.
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