x = (1:100)'; %generate an array [100x1]

%generate a channel object
sampleRate100kHz = 100e3;      % Sample rate of 100K Hz
maxDopplerShift  = 100;        % Maximum Doppler shift of diffuse components (Hz)
delayVector      = [0 1*e-9]; % Discrete delays of two-path channel(s)
gainVector       = [0 -3];     % Average path gains (dB)

% Configure a Rayleigh channel object for user 1
h = comm.RayleighChannel( ...
    'SampleRate',          sampleRate100kHz, ...
    'PathDelays',          delayVector, ...
    'AveragePathGains',    gainVector, ...
    'NormalizePathGains',  true,...
    'MaximumDopplerShift', maxDopplerShift, ...
    'DopplerSpectrum',     doppler('Jakes'), ...
    'RandomStream',        'mt19937ar with seed', ...
    'Seed',                20, ...
    'PathGainsOutputPort', true);

[y,PATHGAINS] = step(h,x);