frequency. The use of beam sweeping affects the synchronization signals and PRACH design, since the initial access procedure must account for the directionality of the transmissions. 5G Air Interface and Physical Layer Procedures - Part 2 We have seen how identifying this SS block transmission in each beam with different time indexes and linking the PRACH resources to these indexes helps in this procedure. This directional aspect of the transmission is new to NR. Finally, we have also gone through some of the considerations about LTE-NR coexistence, especially how the SS block transmissions can utilize 30 kHz subcarrier spacing to avoid interference with the LTE cell-specific reference signals. In the next chapter, we will detail the remaining downlink and uplink physical channels and signals. We will analyze one of the other different concepts of NR, which is called the PDCCH Control Resource Set (CORESET). We will also see different channel coding schemes, such as a Low-Density Parity Check (LDPC) and polar coding. Then, we will examine another new concept, bandwidth parts, and their related use cases. 5G Air Interface and Physical Layer Procedures - Part 3 Regarding physical channels, we have discussed the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH) in the downlink, as well as the Physical Random Access Channel (PRACH) in the uplink, in the previous chapter. In this section, we will go through the rest of the New Radio (NR) physical channels and other aspects related to physical layer procedures. Briefly, we will cover the different channel coding schemes used for NR, and we will go through the processing chain of the downlink and uplink data channels. In this chapter, we will pay particular attention to how the channel structure is changed to allow for lower-latency use cases and how lower latency impacts the operation of Enhanced Mobile Broadband (eMBB) data traffic. Finally, we will discuss Bandwidth Parts (BWPs). In this chapter, we'll