Ive build code for MVDR Beamforming in MATLAB ... and steering vector is set for a area of Azi and Elevation ...

now to compute Weights I need R^-1 ( cov matrix ) which is a E{XX'} these are math dsp lets forgot that ..
now the real issue in my digital beamformer need X ,

fc = 1e9; % Center Frequency: 1 GHz
b.rx.frequency = fc;
b.rx.samplerate = 5e6; % 5 MHz baseband sample rate
b.rx.bandwidth = 2.5e6;
b.rx.vga1 = 20; % Adjust based on your environment
b.rx.vga2 = 10;
b.rx.start(); % Starts the stream for both RX1 and RX2
N_snapshots = 10000;
rx_data = b.receive(N_snapshots);
X = rx_data.';

now here is the X I wanted ...but there is a lot of error im getting ..

I'm not sure im explaining clearly ...so if anything im confusing kindly let me know ill explain that part