項目10ASK編碼器與譯碼器設計

1、項目十a(chǎn)sk編碼器與譯碼器設計班級：09電信姓名：李娟學號：391.實訓目標1)設計m序列發(fā)生器；2)設計ask編碼器；3)設計ask譯碼器；4)在eda-v平臺上實現(xiàn)該設計,并使用示波器觀察并記錄輸出波形。2.實訓內(nèi)容1）根據(jù)系統(tǒng)框圖完成信號發(fā)牛器的設計。2）在edav系統(tǒng)上實現(xiàn)該設計。3）使用示波器觀察ask譯碼器的輸出波形，將此波形與ask編碼器的輸入波形進行 比較，看ask編譯碼是否成功，并記錄波形的頻率以及幅值。3.實訓數(shù)據(jù)1）畫出所設計的系統(tǒng)原理圖，并附上每個模塊的程序代碼。mser的程序代碼：library ieee;use ieee.std_logic_l164.all;use

2、 ieee.std_logic_unsigned.all;entity mser isport( elk : in std_logic;load : in std_logic; mserout : out std_logic);end mser;architecture one of mser issignal msecom : std_logic_vector(3 downto 0);beginprocess (elk)beginif clkt event and elk = t1t thenif load = t 0t thenms e com <= ,r1110 ,r;mserou

3、t <= msecom (3);elsemsecom (3 downto 1) <= msecom (2 downto 0); msecom(0) <= msecom (3) xor msecom (0); mserout <= msecom (3);end if;end if;end process;end one;askcode的程序代碼:library ieee;use ieeestd_logic_l164all;use ieee-std_logic_unsigned- all; entity askcode isgeneric (cnthigh : intege

4、r:= 3; entperiod : integer:= 7);port (elk : in std_logic;datain : in std_logic; askcodeout : out std_logic);end askcode;architecture behave of askcode issignal fsig signal ent :std_logic;integer range 0 to 255;beginprocess (elk)beginif clkt eventand elk=t 1tthenif ent =cnthighthenfsig<=t1t;ent<

5、;=ent +1；elsif ent = entperiodthenfsig<=t 0t;ent<=ent +1；ent<=0;elseent<=urrt +1；end if;end if;end process;process(elk)beginif clkt event and elk = t 1t then if dmtain = t 1t then askcodeout <= fsig;else askcodeout <= t 0 t;end if;end if;end process;end behave;askdec的程序代碼:library i

6、eee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;entity askdec isgeneric(entperiod : integer:= 7);port (elk : in std_logic;askcodein : in std_logic;dataout : out std_logic);end askdec;architecture behave of askdec issignal ent :integer range 0 to 255;signal datacom : std_logic_veuto匸(

7、1 downto 0); signal datareg : std_logic;beginprocess(elk)beginif elkt event and elk = t1t then datacom <= askcodein & datacom (1); end if;end process;process (elk)beginif clktevent and elk = t1t thendatacom <= askcodein & datacom (1);end if;end process;process(elk)beginif clktevent and

8、 elk = t1t thenif d亂tacom = ,r10,r thenif (cnt < entperiod + 2) and (ent > errtperiod - 2) then dataout <= t1t;ent <= 0;end if;elsif ent > (cntperiod + 1) thendataout <= t 0t;ent <= 0;elseent <= ent + 1;end if;end if;end process;2）記錄仿真結果，要求至少包括10個周期的仿真輸出數(shù)據(jù)。ma loadkia clk10liiiiiiiia elk0q mserout0dataout0askcodeout0start: 00ns| bl end:10.0usinterval:10.0us2.0us3.0us4.0us5.0u