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This 29-minute tutorial from the Centre for Networked Intelligence at IISc demonstrates the estimation of Channel Frequency Response in an IEEE 802.11ax SISO-OFDM channel. Learn about BPSK modulated populated sub-carriers of L-LTF field of packet preamble and various methods for estimating channel frequency response (CFR). Follow along with a step-by-step MATLAB code walkthrough that covers using wlanLLTFChannelEstimate(), Least Squares (LS) estimation of CFR over L-LTF subcarriers, and DFT of Actual Channel impulse response plotting. Compare CFR results obtained through all three methods and understand the simulation results in detail. Additional course materials are available on the CNI IISc website.
