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?? ask_modulation.vhd

?? baseband基帶調(diào)制編碼
?? VHD
字號(hào): 
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity ask_modulation is

port(clk : in std_logic;
	mod_sel: in std_logic_vector (1 downto 0);
	I : in std_logic;--signal
	P : in std_logic_vector(13 downto 0);--carrier input
	Q : out std_logic_vector(13 downto 0));--output after mod
end ask_modulation;


architecture behave of ask_modulation is

--signal K : std_logic_vector(13 downto 0);--carrier input
--variable K : std_logic_vector(13 downto 0);--carrier input

begin

	process(clk)
	begin

	if clk'event and clk='1' then
	
		if (mod_sel(1)='1') then
		
			if (I='1') then
				Q<=P;
		--DSB-ASK or SSB-ASK
			elsif (P(13)='0') then--modulation depth=87.5%
				Q(13)<=P(13);
				Q(12)<='0';
				Q(11)<='0';
				Q(10)<='0';
				Q(9)<=P(12);
				Q(8)<=P(11);
				Q(7)<=P(10);
				Q(6)<=P(9);
				Q(5)<=P(8);
				Q(4)<=P(7);
				Q(3)<=P(6);
				Q(2)<=P(5);
				Q(1)<=P(4);
				Q(0)<=P(3);

			else
				Q(13)<=P(13);
				Q(12)<='1';
				Q(11)<='1';
				Q(10)<='1';
				Q(9)<=P(12);
				Q(8)<=P(11);
				Q(7)<=P(10);
				Q(6)<=P(9);
				Q(5)<=P(8);
				Q(4)<=P(7);
				Q(3)<=P(6);
				Q(2)<=P(5);
				Q(1)<=P(4);
				Q(0)<=P(3);	
			end if;

		--PR-ASK
		elsif (mod_sel(1)='0' and mod_sel(0)='1') then--pr-ask modulation mode selected
			if (I='0') then
				Q(13 downto 0)<=P(13 downto 0);--data '0' 
			else								--data '1' oppsite


--not tested				if(P(13)='0') then
--					K(13 downto 0)<=not(P(13 downto 0));
--				else
--					if 	P(0)='1' 	then K(0)<='0';										K(13 downto 1)<=P(13 downto 1);
--					elsif P(1)='1'	then K(1)<='0';		K(0)<='1'; 						K(13 downto 2)<=P(13 downto 2); 
--					elsif P(2)='1'	then K(2)<='0';		K(1 downto 0)<=(others=>'1'); 	K(13 downto 3)<=P(13 downto 3); 
--					elsif P(3)='1'	then K(3)<='0';		K(2 downto 0)<=(others=>'1');	K(13 downto 4)<=P(13 downto 4); 
--					elsif P(4)='1'	then K(4)<='0';		K(3 downto 0)<=(others=>'1');	K(13 downto 5)<=P(13 downto 5); 
--					elsif P(5)='1'	then K(5)<='0';		K(4 downto 0)<=(others=>'1');	K(13 downto 6)<=P(13 downto 6); 
--					elsif P(6)='1'	then K(6)<='0';		K(5 downto 0)<=(others=>'1');	K(13 downto 7)<=P(13 downto 7); 
--					elsif P(7)='1'	then K(7)<='0';		K(6 downto 0)<=(others=>'1');	K(13 downto 8)<=P(13 downto 8); 
--					elsif P(8)='1'	then K(8)<='0';		K(7 downto 0)<=(others=>'1');	K(13 downto 9)<=P(13 downto 9); 
--					elsif P(9)='1'	then K(9)<='0';		K(8 downto 0)<=(others=>'1');	K(13 downto 10)<=P(13 downto 10); 
--					elsif P(10)='1'	then K(10)<='0';	K(9 downto 0)<=(others=>'1');	K(13 downto 11)<=P(13 downto 11); 
--					elsif P(11)='1'	then K(11)<='0';	K(10 downto 0)<=(others=>'1');	K(13 downto 12)<=P(13 downto 12); 
--					elsif P(12)='1'	then K(12)<='0';	K(11 downto 0)<=(others=>'1');	K(13)<=P(13); 
--					else K(13)<='0';	K(12 downto 0)<=(others=>'1');
--					end if;
--				end if;
--		
--				if(P(13)='0') then
--					if 	K(0)='0' 	then Q(0)<='1'; 	Q(13 downto 1)<=K(13 downto 1);
--					elsif K(1)='0' 	then Q(1)<='1';		Q(13 downto 2)<=K(13 downto 2);		Q(0)<='0';
--					elsif K(2)='0' 	then Q(2)<='1';		Q(13 downto 3)<=K(13 downto 3);		Q(1 downto 0)<=(others=>'0');
--					elsif K(3)='0' 	then Q(3)<='1';		Q(13 downto 4)<=K(13 downto 4);		Q(2 downto 0)<=(others=>'0');
--					elsif K(4)='0' 	then Q(4)<='1';		Q(13 downto 5)<=K(13 downto 5);		Q(3 downto 0)<=(others=>'0');
--					elsif K(5)='0' 	then Q(5)<='1';		Q(13 downto 6)<=K(13 downto 6);		Q(4 downto 0)<=(others=>'0');
--					elsif K(6)='0' 	then Q(6)<='1';		Q(13 downto 7)<=K(13 downto 7);		Q(5 downto 0)<=(others=>'0');
--					elsif K(7)='0' 	then Q(7)<='1';		Q(13 downto 8)<=K(13 downto 8);		Q(6 downto 0)<=(others=>'0');
--					elsif K(8)='0' 	then Q(8)<='1';		Q(13 downto 9)<=K(13 downto 9);		Q(7 downto 0)<=(others=>'0');
--					elsif K(9)='0' 	then Q(9)<='1';		Q(13 downto 10)<=K(13 downto 10);	Q(8 downto 0)<=(others=>'0');
--					elsif K(10)='0' then Q(10)<='1';	Q(13 downto 11)<=K(13 downto 11);	Q(9 downto 0)<=(others=>'0');
--					elsif K(11)='0' then Q(11)<='1';	Q(13 downto 12)<=K(13 downto 12);	Q(10 downto 0)<=(others=>'0');
--					elsif K(12)='0' then Q(12)<='1';	Q(13)<='1';		Q(11 downto 0)<=(others=>'0');
--					else Q(13 downto 0)<=(others=>'0');
--					end if;
--				else
--					Q(13 downto 0)<=not(K(13 downto 0));
--				end if;





--double clk				if(P(13)='0') then
--					K(13 downto 0)<=not(P(13 downto 0));
--					if 	K(0)='0' 	then Q(0)<='1'; 	Q(13 downto 1)<=K(13 downto 1);
--					elsif K(1)='0' 	then Q(1)<='1';		Q(13 downto 2)<=K(13 downto 2);		Q(0)<='0';
--					elsif K(2)='0' 	then Q(2)<='1';		Q(13 downto 3)<=K(13 downto 3);		Q(1 downto 0)<=(others=>'0');
--					elsif K(3)='0' 	then Q(3)<='1';		Q(13 downto 4)<=K(13 downto 4);		Q(2 downto 0)<=(others=>'0');
--					elsif K(4)='0' 	then Q(4)<='1';		Q(13 downto 5)<=K(13 downto 5);		Q(3 downto 0)<=(others=>'0');
--					elsif K(5)='0' 	then Q(5)<='1';		Q(13 downto 6)<=K(13 downto 6);		Q(4 downto 0)<=(others=>'0');
--					elsif K(6)='0' 	then Q(6)<='1';		Q(13 downto 7)<=K(13 downto 7);		Q(5 downto 0)<=(others=>'0');
--					elsif K(7)='0' 	then Q(7)<='1';		Q(13 downto 8)<=K(13 downto 8);		Q(6 downto 0)<=(others=>'0');
--					elsif K(8)='0' 	then Q(8)<='1';		Q(13 downto 9)<=K(13 downto 9);		Q(7 downto 0)<=(others=>'0');
--					elsif K(9)='0' 	then Q(9)<='1';		Q(13 downto 10)<=K(13 downto 10);	Q(8 downto 0)<=(others=>'0');
--					elsif K(10)='0' then Q(10)<='1';	Q(13 downto 11)<=K(13 downto 11);	Q(9 downto 0)<=(others=>'0');
--					elsif K(11)='0' then Q(11)<='1';	Q(13 downto 12)<=K(13 downto 12);	Q(10 downto 0)<=(others=>'0');
--					elsif K(12)='0' then Q(12)<='1';	Q(13)<='1';		Q(11 downto 0)<=(others=>'0');
--					else Q(13 downto 0)<=(others=>'0');
--					end if;
--				else
--					if 	P(0)='1' 	then K(0)<='0';										K(13 downto 1)<=P(13 downto 1);
--					elsif P(1)='1'	then K(1)<='0';		K(0)<='1'; 						K(13 downto 2)<=P(13 downto 2); 
--					elsif P(2)='1'	then K(2)<='0';		K(1 downto 0)<=(others=>'1'); 	K(13 downto 3)<=P(13 downto 3); 
--					elsif P(3)='1'	then K(3)<='0';		K(2 downto 0)<=(others=>'1');	K(13 downto 4)<=P(13 downto 4); 
--					elsif P(4)='1'	then K(4)<='0';		K(3 downto 0)<=(others=>'1');	K(13 downto 5)<=P(13 downto 5); 
--					elsif P(5)='1'	then K(5)<='0';		K(4 downto 0)<=(others=>'1');	K(13 downto 6)<=P(13 downto 6); 
--					elsif P(6)='1'	then K(6)<='0';		K(5 downto 0)<=(others=>'1');	K(13 downto 7)<=P(13 downto 7); 
--					elsif P(7)='1'	then K(7)<='0';		K(6 downto 0)<=(others=>'1');	K(13 downto 8)<=P(13 downto 8); 
--					elsif P(8)='1'	then K(8)<='0';		K(7 downto 0)<=(others=>'1');	K(13 downto 9)<=P(13 downto 9); 
--					elsif P(9)='1'	then K(9)<='0';		K(8 downto 0)<=(others=>'1');	K(13 downto 10)<=P(13 downto 10); 
--					elsif P(10)='1'	then K(10)<='0';	K(9 downto 0)<=(others=>'1');	K(13 downto 11)<=P(13 downto 11); 
--					elsif P(11)='1'	then K(11)<='0';	K(10 downto 0)<=(others=>'1');	K(13 downto 12)<=P(13 downto 12); 
--					elsif P(12)='1'	then K(12)<='0';	K(11 downto 0)<=(others=>'1');	K(13)<=P(13); 
--					else K(13)<='0';	K(12 downto 0)<=(others=>'1');
--					end if;
--					Q(13 downto 0)<=not(K(13 downto 0));
--				end if;	




				
--variable usage				if(P(13)='0') then
--					K(13 downto 0):=not(P(13 downto 0));
--					if 	K(0)='0' 	then Q(0)<='1'; 	Q(13 downto 1)<=K(13 downto 1);
--					elsif K(1)='0' 	then Q(1)<='1';		Q(13 downto 2)<=K(13 downto 2);		Q(0)<='0';
--					elsif K(2)='0' 	then Q(2)<='1';		Q(13 downto 3)<=K(13 downto 3);		Q(1 downto 0)<=(others=>'0');
--					elsif K(3)='0' 	then Q(3)<='1';		Q(13 downto 4)<=K(13 downto 4);		Q(2 downto 0)<=(others=>'0');
--					elsif K(4)='0' 	then Q(4)<='1';		Q(13 downto 5)<=K(13 downto 5);		Q(3 downto 0)<=(others=>'0');
--					elsif K(5)='0' 	then Q(5)<='1';		Q(13 downto 6)<=K(13 downto 6);		Q(4 downto 0)<=(others=>'0');
--					elsif K(6)='0' 	then Q(6)<='1';		Q(13 downto 7)<=K(13 downto 7);		Q(5 downto 0)<=(others=>'0');
--					elsif K(7)='0' 	then Q(7)<='1';		Q(13 downto 8)<=K(13 downto 8);		Q(6 downto 0)<=(others=>'0');
--					elsif K(8)='0' 	then Q(8)<='1';		Q(13 downto 9)<=K(13 downto 9);		Q(7 downto 0)<=(others=>'0');
--					elsif K(9)='0' 	then Q(9)<='1';		Q(13 downto 10)<=K(13 downto 10);	Q(8 downto 0)<=(others=>'0');
--					elsif K(10)='0' then Q(10)<='1';	Q(13 downto 11)<=K(13 downto 11);	Q(9 downto 0)<=(others=>'0');
--					elsif K(11)='0' then Q(11)<='1';	Q(13 downto 12)<=K(13 downto 12);	Q(10 downto 0)<=(others=>'0');
--					elsif K(12)='0' then Q(12)<='1';	Q(13)<='1';		Q(11 downto 0)<=(others=>'0');
--					else Q(13 downto 0)<=(others=>'0');
--					end if;
--				else
--					if 	P(0)='1' 	then K(0):='0';										K(13 downto 1):=P(13 downto 1);
--					elsif P(1)='1'	then K(1):='0';		K(0):='1'; 						K(13 downto 2):=P(13 downto 2); 
--					elsif P(2)='1'	then K(2):='0';		K(1 downto 0):=(others=>'1'); 	K(13 downto 3):=P(13 downto 3); 
--					elsif P(3)='1'	then K(3):='0';		K(2 downto 0):=(others=>'1');	K(13 downto 4):=P(13 downto 4); 
--					elsif P(4)='1'	then K(4):='0';		K(3 downto 0):=(others=>'1');	K(13 downto 5):=P(13 downto 5); 
--					elsif P(5)='1'	then K(5):='0';		K(4 downto 0):=(others=>'1');	K(13 downto 6):=P(13 downto 6); 
--					elsif P(6)='1'	then K(6):='0';		K(5 downto 0):=(others=>'1');	K(13 downto 7):=P(13 downto 7); 
--					elsif P(7)='1'	then K(7):='0';		K(6 downto 0):=(others=>'1');	K(13 downto 8):=P(13 downto 8); 
--					elsif P(8)='1'	then K(8):='0';		K(7 downto 0):=(others=>'1');	K(13 downto 9):=P(13 downto 9); 
--					elsif P(9)='1'	then K(9):='0';		K(8 downto 0):=(others=>'1');	K(13 downto 10):=P(13 downto 10); 
--					elsif P(10)='1'	then K(10):='0';	K(9 downto 0):=(others=>'1');	K(13 downto 11):=P(13 downto 11); 
--					elsif P(11)='1'	then K(11):='0';	K(10 downto 0):=(others=>'1');	K(13 downto 12):=P(13 downto 12); 
--					elsif P(12)='1'	then K(12):='0';	K(11 downto 0):=(others=>'1');	K(13):=P(13); 
--					else K(13):='0';	K(12 downto 0):=(others=>'1');
--					end if;
--					Q(13 downto 0)<=not(K(13 downto 0));
--				end if;		



--				if(P(13)='0') then
--					K(13 downto 0)<=not(P(13 downto 0));
					if 	P(0)='1' 	then Q(0)<='1'; 	Q(13 downto 1)<=NOT P(13 downto 1);
					elsif P(1)='1' 	then Q(1)<='1';		Q(13 downto 2)<=NOT P(13 downto 2);		Q(0)<='0';
					elsif P(2)='1' 	then Q(2)<='1';		Q(13 downto 3)<=NOT P(13 downto 3);		Q(1 downto 0)<=(others=>'0');
					elsif P(3)='1' 	then Q(3)<='1';		Q(13 downto 4)<=NOT P(13 downto 4);		Q(2 downto 0)<=(others=>'0');
					elsif P(4)='1' 	then Q(4)<='1';		Q(13 downto 5)<=NOT P(13 downto 5);		Q(3 downto 0)<=(others=>'0');
					elsif P(5)='1' 	then Q(5)<='1';		Q(13 downto 6)<=NOT P(13 downto 6);		Q(4 downto 0)<=(others=>'0');
					elsif P(6)='1' 	then Q(6)<='1';		Q(13 downto 7)<=NOT P(13 downto 7);		Q(5 downto 0)<=(others=>'0');
					elsif P(7)='1' 	then Q(7)<='1';		Q(13 downto 8)<=NOT P(13 downto 8);		Q(6 downto 0)<=(others=>'0');
					elsif P(8)='1' 	then Q(8)<='1';		Q(13 downto 9)<=NOT P(13 downto 9);		Q(7 downto 0)<=(others=>'0');
					elsif P(9)='1' 	then Q(9)<='1';		Q(13 downto 10)<=NOT P(13 downto 10);	Q(8 downto 0)<=(others=>'0');
					elsif P(10)='1' then Q(10)<='1';	Q(13 downto 11)<=NOT P(13 downto 11);	Q(9 downto 0)<=(others=>'0');
					elsif P(11)='1' then Q(11)<='1';	Q(13 downto 12)<=NOT P(13 downto 12);	Q(10 downto 0)<=(others=>'0');
					elsif P(12)='1' then Q(12)<='1';	Q(13)<=NOT P(13);						Q(11 downto 0)<=(others=>'0');
					else Q(13 downto 0)<=P(13 downto 0);
					end if;
--				else
--					if 	P(0)='1' 	then Q(0)<='1';										Q(13 downto 1)<=NOT P(13 downto 1);
--					elsif P(1)='1'	then Q(1)<='1';		Q(0)<='0'; 						Q(13 downto 2)<=NOT P(13 downto 2); 
--					elsif P(2)='1'	then Q(2)<='1';		Q(1 downto 0)<=(others=>'0'); 	Q(13 downto 3)<=NOT P(13 downto 3); 
--					elsif P(3)='1'	then Q(3)<='1';		Q(2 downto 0)<=(others=>'0');	Q(13 downto 4)<=NOT P(13 downto 4); 
--					elsif P(4)='1'	then Q(4)<='1';		Q(3 downto 0)<=(others=>'0');	Q(13 downto 5)<=NOT P(13 downto 5); 
--					elsif P(5)='1'	then Q(5)<='1';		Q(4 downto 0)<=(others=>'0');	Q(13 downto 6)<=NOT P(13 downto 6); 
--					elsif P(6)='1'	then Q(6)<='1';		Q(5 downto 0)<=(others=>'0');	Q(13 downto 7)<=NOT P(13 downto 7); 
--					elsif P(7)='1'	then Q(7)<='1';		Q(6 downto 0)<=(others=>'0');	Q(13 downto 8)<=NOT P(13 downto 8); 
--					elsif P(8)='1'	then Q(8)<='1';		Q(7 downto 0)<=(others=>'0');	Q(13 downto 9)<=NOT P(13 downto 9); 
--					elsif P(9)='1'	then Q(9)<='1';		Q(8 downto 0)<=(others=>'0');	Q(13 downto 10)<=NOT P(13 downto 10); 
--					elsif P(10)='1'	then Q(10)<='1';	Q(9 downto 0)<=(others=>'0');	Q(13 downto 11)<=NOT P(13 downto 11); 
--					elsif P(11)='1'	then Q(11)<='1';	Q(10 downto 0)<=(others=>'0');	Q(13 downto 12)<=NOT P(13 downto 12); 
--					elsif P(12)='1'	then Q(12)<='1';	Q(11 downto 0)<=(others=>'0');	Q(13)<=NOT P(13); 
--					else Q(13)<='1';	K(12 downto 0)<=(others=>'0');
--					end if;
----					Q(13 downto 0)<=not(K(13 downto 0));
--				end if;	
			
			end if;
		--CW
		else
			Q(13 downto 0)<=P(13 downto 0);
		end if;
		
	end if;
	end process;
end behave;

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