function [distance_v, speed_v] = get_range_speed_val(PRF, fs, fc, numP, gamma_r, gamma_d)
% Calculates range and speed values for node index
%
% Usage: 
% [distance_v, speed_v] = get_range_speed_val(PRF, fs, fc, numP, gamma_r, gamma_d)
%
% Inputs:
%   PRF:         Pulse Repetition frequency
%   fs:          Sampling frequency
%   fc:          Carrier frequency
%   numP:        Number of pulses
%   gamma_r:     Range compression ratio(0.5)
%   gamma_d:     Doppler compression ratio(0.5)
%
% Outputs:
%   distance_v:  Real distance value
%   speed_v:     Real speed value


    % parameters
    if nargin < 6
        gamma_d = 0.5;
    end
    if nargin < 5
        gamma_r = 0.5;
    end
    c = 3e8;
    Tr = 1 / PRF;
    lambda = c / fc;
    
    % calculate
    distance_v = 0: (c / fs / 2 * gamma_r) : (Tr * c / 2 - c / fs / 2 * gamma_r);
    speed_v = -(-PRF / 2: PRF / numP * gamma_d: PRF / 2 - PRF / numP * gamma_d) * lambda / 2 ;
    
end