Physical Channel Types of LTE The physical layer uses resource blocks to transmit binary coded information in QPKS, 16QAM or 64QAM or OOK modulation form. Physical channels determine how data is processed and then mapped via dynamical scheduling onto resource blocks. Thus physical channels also in EUTRAN represent the available physical resources. Like transport channels, … Read more
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 … Read more
LTE : Data Transmission in DL In Long-Term Evolution (LTE), data transmission in the Downlink (DL) involves the transfer of user data from the Evolved NodeB (eNB) to the User Equipment (UE). The LTE DL is designed to provide high data rates, low latency, and efficient spectrum utilization. Here’s an overview of the key aspects … Read more
Here I write about each and every channel of LTE with its Functionality. How many channel and what its work. LTE Channel Functionality. List of channel with its work Physical channels PDSCH: Physical Downlink Shared Channel PBCH: Physical broadcast channel PMCH: Physical multicast channel PDCCH: Physical Downlink Control Channel PCFICH: Physical control format indicator channel … Read more
System information 1920 bits or 1728 bits are to be transmitted for normal or extended CP resp.. The PBCH is transmitted every 40 ms. The bit scrambling depends on the cell id and is starting in radio frames 0, 4, 8 … . PBCH uses QPSK. I.e. 960 (864) symbols need to be allocated. Mapping … Read more
The Tx Div can be applied on all the physical channels: Physical DL Shared Channel (PDSCH) Physical Broadcast Channel (PBCH) Physical Control Format Indicator Channel (PCFICH) Physical Downlink Control Channel (PDCCH) The other MIMO schemes are only applicable to the PDSCH Like the MIMO required a UE-specific feedback (RI and PMI), it is not possible … Read more
How Physical channel of LTE works in UL & DL?A distinction has to made between: The Physical channel The Physical signal The DL physical channels are: Physical DL Shared Channel (PDSCH) It is a shared channel used to carry user data, radio & core network, system information (BCH), paging message. Physical DL Control Channel (PDCCH) … Read more
RE – groups & CFI – Control Format Indication in LTE is as below. RE – groups In order to support DL control information mapping, RE-groups are defined. Four useful symbols are bundled, useful in the sense that RE’s carrying the cellspecific reference symbols are not available. The one cell-specific RS case is mapped in … Read more
Here I write on LTE TDD Specific Frequency Planning Considerations. What to consider and why for TDD Frequency Planning. It is very common for telecom Operators within the TDD band of LTE have a wider unpaired spectrum than the bandwidth defined maximum carrier bandwidth of 20MHz. As a result, the selection of carrier bandwidth for … Read more