Downlink Channels
Use LTE Toolbox™ mid-level downlink channel processing functions to:
Create physical signals and physical channels for transmission and reception.
Create, encode, and decode transport channels.
Create, manipulate, encode, and decode control information messages.
Perform OFDM modulation and demodulation.
For function mapping within the downlink grid, see Downlink Physical Channels Grid and Downlink Physical Signals Grid.
Categories
- Physical Signals
Synchronization signals (PSS and SSS), downlink reference signals (CRS, DM-RS, CSI-RS, and PRS)
- Physical Channels
PBCH, PDSCH, PDCCH, PCFICH, PHICH and EPDCCH coding, modulation, indices, scrambling sequence
- Transport Channels
BCH coding, DL-SCH coding and information
- Control Information
DCI creation, manipulation, coding, and information; CFI coding; UL-PMI information and selection
- OFDM Modulation
Orthogonal frequency division multiplexing modulator, demodulator, dimension information
Featured Examples
LTE Parameterization for Waveform Generation and Simulation
Parameterize end-to-end simulations and generate static waveforms by using LTE Toolbox™ software. This example focuses on downlink transmissions, but the concepts discussed also apply to uplink transmissions.
LTE DL-SCH and PDSCH Processing Chain
In LTE the Downlink Shared Channel (DL-SCH) is a transport channel used for the transmission of user data, dedicated control and user-specific higher layer information and downlink system information. The Physical Downlink Shared Channel (PDSCH) is the physical channel that carries the DL-SCH coded data. This example shows the different stages involved in the Downlink Shared Channel (DL-SCH) and Physical Downlink Shared Channel (PDSCH) processing and provides access to the data from these intermediate stages.
Create Synchronization Signals
Construct synchronization signals using LTE Toolbox™. In this example, you create the primary and secondary synchronization signals and map them to a resource grid.
NB-IoT Downlink Waveform Generation
Generate LTE-Advanced Pro Release 13 narrowband IoT (NB-IoT) waveforms for test and measurement applications using LTE Toolbox™ software.
LTE-M Downlink Waveform Generation
Create a downlink LTE-M transmission consisting of MTC Physical Downlink Control Channel (MPDCCH) as well as its associated Physical Downlink Shared Channel (PDSCH) and Physical Broadcast Channel (PBCH), including repetitions and frequency hopping. When compared to pre-Release 13 devices, Cat-M devices offer lower cost and complexity, enhanced coverage by the introduction of repetitions and an extended DRX for further power saving.
