duc.vhd

基于XILINX ISE下的数字上变频设计

LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_textio.all;
use std.textio.all;
--  Uncomment the following lines to use the declarations that are
--  provided for instantiating Xilinx primitive components.
--library UNISIM;
--use UNISIM.VComponents.all;

entity DUC is
PORT (
	Clk 		: IN std_logic;
	Rst			: IN std_logic;
	
	tx_I     : IN std_logic_vector(11 downto 0);
	tx_Q     : IN std_logic_vector(11 downto 0);

	FreqOffset	: in std_logic_vector (31 downto 0);
	AmpI    : IN std_logic_vector(11 downto 0);
	AmpQ    : IN std_logic_vector(11 downto 0);

	DataOutI  : out std_logic_vector(15 downto 0);
	DataOutQ  : out std_logic_vector(15 downto 0));
	
end entity;

architecture Behavioral of DUC is

--SIGNAL ClkCnt   :std_logic_vector(2 downto 0);
--
--signal RCosIReg : std_logic_vector(7 downto 0);
--signal RCosQReg : std_logic_vector(7 downto 0);
--signal RcosIAddr : std_logic_vector(10 downto 0);
--signal RcosQAddr : std_logic_vector(10 downto 0);
--signal RCosIOut : std_logic_vector(15 downto 0);
--signal RCosQOut : std_logic_vector(15 downto 0);
--component tx_rcos_rom
--	port (
--	addr: IN std_logic_VECTOR(10 downto 0);
--	clk: IN std_logic;
--	dout: OUT std_logic_VECTOR(15 downto 0));
--END component;

signal MulInI : std_logic_vector(15 downto 0);
signal HAmpI : std_logic_vector(12 downto 0);
signal MulOutI : std_logic_vector(28 downto 0);
signal MulInQ : std_logic_vector(15 downto 0);
signal HAmpQ : std_logic_vector(12 downto 0);
signal MulOutQ : std_logic_vector(28 downto 0);

component mul_amp
   port ( A_IN   : in    std_logic_vector (15 downto 0); 
          B_IN   : in    std_logic_vector (12 downto 0); 
			 CARRYIN_IN : in std_logic;
          CLK_IN : in    std_logic; 
          P_OUT  : out   std_logic_vector (28 downto 0));
end component;


SIGNAL sin      : std_logic_vector(13 downto 0);
SIGNAL cos      : std_logic_vector(13 downto 0);
SIGNAL NCOCnt  : std_logic_vector(31 downto 0);
component nco_sinetab
PORT 	(
	THETA: IN std_logic_VECTOR(9 downto 0);
	CLK: IN std_logic;
	SINE: OUT std_logic_VECTOR(13 downto 0);
	COSINE: OUT std_logic_VECTOR(13 downto 0));
end component;


COMPONENT tx_halfband_compmul
PORT(
	Clk : IN std_logic;
	In_En : IN std_logic;
	I1 : IN std_logic_vector(15 downto 0);
	Q1 : IN std_logic_vector(15 downto 0);
	I2 : IN std_logic_vector(13 downto 0);
	Q2 : IN std_logic_vector(13 downto 0);          
	Out_En : OUT std_logic;
	ReRes : OUT std_logic_vector(15 downto 0);
	ImRes : OUT std_logic_vector(15 downto 0)
	);
END COMPONENT;

signal DataItp,DataQtp : std_logic_vector(15 downto 0);


begin

--begin
--
--process(Clk, Rst)	    
--begin
--	if ( Rst = '1') then
--	elsif (Clk'event and Clk='1') then
--		if En = '1' then
--			if ( InBitEn = '1' ) then
--				ClkCnt <= (others=>'0');
--			else
--				ClkCnt<=ClkCnt+1;		
--			end if;
--		else
--			ClkCnt <= (others=>'0');
--		end if;
--	end if;
--end process;

--process( Clk, Rst)	  
--begin  
--	if (Rst='1') then
--		RCosIReg <= (others=>'0');
--		RCosQReg <= (others=>'0');
--	elsif (Clk'event and Clk='1') then
--		if En = '1' then
--			if ( InBitEn ='1') then
--				RCosIReg <= RCosIReg (6 downto 0) & InBitI;
--				RCosQReg <= RCosQReg (6 downto 0) & InBitQ;
--			end if;
--		end if;
--	end if;
--end process;

--RcosIAddr <= RCosIReg & ClkCnt(2 downto 0);
--RcosQAddr <= RCosQReg & ClkCnt(2 downto 0);
--
--Rcos_Rom_I : tx_rcos_rom PORT MAP (
--	addr => RcosIAddr,
--	clk  => Clk,
--	dout => RCosIOut);
--Rcos_Rom_Q : tx_rcos_rom PORT MAP (
--	addr => RcosQAddr,
--	clk  => Clk,
--	dout => RCosQOut);

--MulInI <= RCosIOut when ModEnI = '1' else X"7fff";
--MulInQ <= RCosQOut when ModEnQ = '1' else X"7fff";

MulInI <= tx_I & "0000";
MulInQ <= tx_Q & "0000";
HAmpI <= '0'&AmpI;
HAmpQ <= '0'&AmpQ;
amp_mul_I : mul_amp PORT MAP (
		A_IN => MulInI,
		B_IN => HAmpI,
		CARRYIN_IN => '0',
		CLK_IN => Clk,
		P_OUT => MulOutI);
amp_mul_Q : mul_amp PORT MAP (
		A_IN => MulInQ,
		B_IN => HAmpQ,
		CARRYIN_IN => '0',
		CLK_IN => Clk,
		P_OUT => MulOutQ);

process (Clk, Rst)
begin
	if (Rst='1') then
		NCOCnt <= (others=>'0');
	elsif (Clk'event and Clk='1') then
			NCOCnt <= NCOCnt+FreqOffset;
	end if;
end process;

sintab : nco_sinetab PORT MAP(
	THETA=>NCOCnt(31 downto 22),
	CLK => Clk,
	SINE=> sin,
	COSINE=>cos
	);


NCO_mul : Tx_Halfband_Compmul	 PORT MAP( 
      Clk    =>Clk,
	  In_En  =>'1',
	  I1     =>MulOutI(27 downto 12), --HBOut_Itp,
	  I2     =>cos,
	  Q1     =>MulOutQ(27 downto 12),
	  Q2     =>sin,
	  ReRes  =>DataItp,  
	  ImRes  =>DataQtp);

--Process(Clk)
--Begin
--	if Clk'event and Clk = '1' then
		DataOutI <= DataItp;
		DataOutQ <= DataQtp;
--	end if;
--end process;


end Behavioral;