LTE Downlink & Uplink Physical Channel

LTE Downlink Physical Channel Physical Downlink Shared Channel ( PDSCH)

This channel is used for unicastand paging functions.
Carries the DL-SCH and PCH.
QPSK,16-QAM,and 64-QAM Modulation.

Physical Downlink Control Channel (PCSCH)

Informs the UE about the resource allocation of PCH and DL-SCH, and Hybrid ARQ information related to DL-SCH.
Carries the uplink scheduling grant.
QPSK Modulation.

LTE Uplink Physical Channel Physical HARQ Indicator Channel (PHICH)

Used to report the Hybrid ARQ status
Carries Hybrid ARQ ACK/NAKs in response to uplink transmissions.
QPSK Modulation

Physical Braodcast Channel (PBCH)

This physical channel carries system information for UEs requiring to access the network.
QPSK Modulation.

LTE Downlink Physical Channel

In Long-Term Evolution (LTE) networks, the downlink physical channel is a crucial component of the communication system. It is responsible for transmitting information from the base station (eNodeB) to the user equipment (UE). The downlink physical channel includes various channels such as the Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Control Format Indicator Channel (PCFICH).

LTE Uplink Physical Channel

On the other hand, the uplink physical channel in LTE facilitates the transmission of data from the UE to the eNodeB. It comprises channels like the Physical Uplink Shared Channel (PUSCH) and Physical Uplink Control Channel (PUCCH). The uplink plays a crucial role in establishing bidirectional communication, allowing users to send data, requests, and acknowledgments to the network.

Understanding the characteristics and functionalities of both the downlink and uplink physical channels is essential for comprehending the overall LTE communication process. These channels work in tandem to ensure efficient and reliable wireless data transmission in LTE networks.