Multiplication of 1 bit with vector

[Renu]

Hi all...
I am presently working on Matched filter.. the task is, matched filter should be implemented witout using the Core Generator..I am using Xilinx ISE 9.2i..
and the coeff for matched filter are floating point type.. can anybody please help in writting a code for multiplication of std_logic_vector( 11 downto 0) with std_logic... is it suitable to use multiplication operator (*) for this?
please help in this regard....
thanks in advance...

regards,
Renu

 

[allsey_1987]

a single std_logic can only take values real values i.e. '1' or '0'...

maybe a simple if statement will solve your problem

signal theBit : std_logic;
signal theVector, ans : std_logic_vector(11 downto 0);  

if(theBit = '1') then
	ans <= theVector
else
	ans <= (others => '0');
end if;

p.s. multiplication is a intensive operation and should avoided if another option is present...

 

[Renu]

MAC without using the multiplier

hi ...
can any body please tell me, how to implement a MAC without using a actual multiplier for a filter with delay taps included...waiting for ur reply.. thanks..