An antenna port is defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed.

1. 天线端口是指能进行信道估计分辨的端口数，即与参考信号有关。
2. 每个天线端口对应一套资源格（Resourse Grid），以及对应的参考信号图案。
3. 天线端口是从接收者的角度定义的（下行的接收是UE，上行的接收是基站），一个端口对于接收者来说是一个独立的天线信道。
4. 天线端口是一个逻辑上的概念，与实际的物理天线没有一一对应的关系，二者之间的映射关系由各个厂商自己实现，协议并没有规定。

Channel/Signal Antenna Ports
PDSCH Antenna ports starting with 1000
PDCCH Antenna ports starting with 2000
CSI-RS Antenna ports starting with 3000
SS/PBCH Antenna ports starting with 4000
PUSCH/DMRS Antenna ports starting with 0
SRS Antenna ports starting with 1000
PUCCH Antenna ports starting with 2000
PRACH Antenna port 4000

（完）