Downlink Beamforming - 2024.2 English - XD100

Vitis Tutorials: AI Engine Development (XD100)

Document ID
XD100
Release Date
2024-12-06
Version
2024.2 English

A single symbol of an OFDM system contains a frequency component and time component allocated to a single user (X0,0). Multiple symbols in different layers of an OFDM system (X0,0,X0,1,X0,2,X0,3) are multiplied by a specific set of complex weights (H0,0,H1,0,H2,0,H3,0) so the data between layers becomes “orthogonal” to each other. This orthogonality allows the layers to be summed together into a single signal (Y0,0) which is sent to an antenna. A second antenna signal (X0,1) can be created by multiplying another set of weights (H0,1,H1,1,H2,1,H3,1) to each layer (X0,0,X0,1,X0,2,X0,3). The same is done to create the rest of the antenna signals (Y0,2,Y0,3,Y0,4, and Y0,5).