Layer mapping in 5g nr

1. What is layer mapping in 5G NR?
2. What are layers in MIMO?
3. What is layer mapping in LTE?
4. What is MAC layer in 5G?

What is layer mapping in 5G NR?

Layer mapping is the operation that maps one or two codewords to up to eight layers. This operation is somewhat simplified compared to LTE, where you could see one or two codewords for a given number of layers. In 5G NR, as mentioned earlier, anything up to four layers uses a single codeword.

What are layers in MIMO?

Single-user MIMO (SU-MIMO) is the ability to transmit one or multiple data streams, called layers, from one transmitting array to a single user. SU-MIMO can thereby increase the throughput for that user and increase the capacity of the network.

What is layer mapping in LTE?

(2) Layer Mapping : This is the process where each codeword is mapped to mapped to one or multiple layers. Refer to Layer Mapping page. (3) Precoding : This is process where the layer data are allocated to multiple antenna ports (logical antenna ports in this stage). See the first section of Precoding page for details.

What is MAC layer in 5G?

-In the transmit direction, the MAC sublayer maps logical channels from the RLC sublayer to transport channels going to the PHY layer. Multiple logical channels can be multiplexed within a transport block. Demultiplexing is performed by MAC in the receive direction.