 depends on the information bits. 12 subcarriers PUCCH Sequence # 1 PUCCH Sequence # o UCI = oo UCI = 01 UCI = 10 UCI = 11 PUCCH Sequence # 3 PUCCH Sequence # 2 Figure 6.11 - PUCCH format 0 In the figure here, you can see four PUCCH sequences with the information bits presented. Uplink physical channels and signals 1 PRB (12 subcarriers) Figure 6.12-PUCCHformat 2 Format 2 for the PUCCH is another short PUCCH with no multiplexing in the same PRB, and contiguous PRB allocation. The DMRS is mapped on REs 1, 4, 7, and 10 for each PRB. In the figure here, you can see where the DMRS is mapped in a PRB used for this PUCCH format. The long PUCCH Format 1 is a long PUCCH used with two bits or fewer. This format uses 12 subcarriers, and it is between 4 and 12 OFDM symbols. Information bits are modulated onto a single modulated symbol, which is spread using a Zadoff-Chu sequence for each OFDM symbol. The DMRS is introduced in every other symbol in the time domain, as can be seen from the following figure: 12 subcarriers w.(O) r U,V (a) (n) w.(1) w.(2) Figure 6.13 - PUCCH format 1 5G Air Interface and Physical Layer Procedures - Part 3 Formats 3 and 4 are the remaining long PUCCH formats. These can be configured with intra-slot frequency hopping for more diversity and can span over more than one slot with inter-slot frequency hopping, which is optionally available. In this section, we've covered the downlink physical channels, PUSCH and PUCCH, and some of their aspects. Thereby, we have covered the main physical channels and signals in the downlink and uplink. To complete the physical layer description, we also need to consider the channel coding schemes. Channel coding schemes Low-Density Parity Check (LDPC) code is used for eMBB physical data channels in which polar codes are employed for eMBB physical control channels, as well as for the PBCH. These channel coding schemes provide better throughput and latency performance compared to what we have in legacy LTE. Note that channel coding for other use cases such as massive M