Does anyone know that how does channel model of typical urban be implemented in LTE-A downlink system level simulator? By the way, I don’t understand the means of TU_1x1_SIXO_20MHz_500.0Kmph_1s_delay_0_v1_ and TU_BS-1TX_UE-1RX_20MHz_500.0Kmph_1s_v2_ in channel trace file. Can someone tell me? thank you.
The typical urban (TU) channel model is a pdp-based channel model. You can find the implementation on +channel_gain_wrappers/pdpChannelFactory.m.
In the simulator it is possible to generate a channel trace for the first time and then reuse the same in other simulations by setting these parameters to
LTE_config.cache_network = true;
LTE_config.delete_ff_trace_at_end = false;
Otherwise you generate a new trace in each simulation run and delete it at the end of simulation.
Thank you for your reply. I still have several questions that I want to ask. Does channel trace save channel matrix? what is different between TU_1x1_SIXO_20MHz_500.0Kmph_1s_delay_0_v1_ and TU_BS-1TX_UE-1RX_20MHz_500.0Kmph_1s_v2_? thank you.
The channel matrix is saved as UE object for each user.
Two channnel traces are supported by our simulator:
– v1 channel trace: enables to determine the optimal precoder for each transmis-sion rank a-priori as the channel H is known a-priori
– v2 channel trace: supports runtime precoding based on the actual channel H determined at the runtime
Your reply helps me a lot, thank you. However, I have some questions that let me confuse. In workspace of MATLAB, I can’t find the channel matrix of every UE. How can I reveal the channel matrix of UE in workspace? Another question, does channel of typical urban consider the doppler effect? thank you.