Generating a signal with noise

Hi dave

Thanks for the advice. I worked on the code and the output i am expecting is sum on input and random noise but i am getting what ever input i give as output. Here is the code

LIBRARY IEEE;

USE IEEE.STD_LOGIC_1164.ALL;

USE IEEE.NUMERIC_STD.ALL;

ENTITY cumulants IS

GENERIC (n : INTEGER := 32);

PORT( clk : IN STD_LOGIC;

x : IN STD_LOGIC_VECTOR (n-1 DOWNTO 0);

y : OUT STD_LOGIC_VECTOR (n-1 DOWNTO 0)

);

END ENTITY cumulants;

ARCHITECTURE Behavioral of cumulants is

COMPONENT random

PORT( clk : IN STD_LOGIC;

random_num : OUT STD_LOGIC_VECTOR (n-1 DOWNTO 0)

);

END COMPONENT random;

SHARED VARIABLE rand_temp1 : STD_LOGIC_VECTOR(n-1 DOWNTO 0);

SIGNAL s : INTEGER;

BEGIN

u1 : random PORT MAP ( clk => clk, random_num => rand_temp1 );

PROCESS(clk)

BEGIN

IF(RISING_EDGE(clk)) THEN

y <= x OR rand_temp1 ;

END IF;

END PROCESS;

END;

The code for random number is shown above any help would be appreciated

Aditya