减少matlab循环的运行时间
问题描述:
我的matlab代码波纹管需要很长时间才能运行。我怎么能把它编写成只需几秒钟跑?如果你能帮助我,我会很感激。参数i,k_hat和alpha是常量。减少matlab循环的运行时间
%%%%%%%%%%%%%%%%%%%
p_desired=zeros(1,length(alpha));
p_ICI=zeros(1,length(alpha));
p_MUI=zeros(1,length(alpha));
tic
for ss=1:length(alpha)
uN=2*pi/N*Ts*abs(sin(alpha(ss)));
uM=2*pi/M*Ts*abs(sin(alpha(ss)));
for j=0:M/N-1
for k=0:N-1
for q=0:N-1
for qq=0:N-1
for q_hat=0:N-1
for qq_hat=0:N-1
for n=0:M-1
for m=-Ng:M-1
for n_hat=0:N-1
for m_hat=-Ng:N-1
if (n-m-n_hat+m_hat==0)
if (i==j && k==k_hat)
p_desired(ss)=p_desired(ss)+((sin(-alpha(ss))-1i*cos(-alpha(ss)))/N)^.5*exp(1i/2*k_hat^2*cot(-alpha(ss))*uN^2)*exp(1i/2*q^2*cot(-alpha(ss))*Ts^2)*exp(-1i*2*pi*q*k_hat/N)...
*((sin(-alpha(ss))+1i*cos(-alpha(ss)))/N)^.5*exp(-1i/2*k_hat^2*cot(-alpha(ss))*uN^2)*exp(-1i/2*q_hat^2*cot(-alpha(ss))*Ts^2)*exp(+1i*2*pi*q_hat*k_hat/N)...
* ((sin(alpha(ss))-1i*cos(alpha(ss)))/N)^.5*exp(1i/2*qq^2*cot(alpha(ss))*uN^2)*exp(1i/2*k_hat^2*cot(alpha(ss))*Ts^2)*exp(-1i*2*pi*qq*k_hat/N)...
*((sin(alpha(ss))+1i*cos(alpha(ss)))/N)^.5*exp(-1i/2*qq_hat^2*cot(alpha(ss))*uN^2)*exp(-1i/2*k_hat^2*cot(alpha(ss))*Ts^2)*exp(+1i*2*pi*qq_hat*k_hat/N)...
*((sin(alpha(ss))-1i*cos(alpha(ss)))/M)^.5*exp(1i/2*(q+N*(i-1))^2*cot(alpha(ss))*uM^2)*exp(1i/2*n^2*cot(alpha(ss))*Ts^2)*exp(-1i*2*pi*(q+N*(i-1))*n/M)...
*((sin(alpha(ss))+1i*cos(alpha(ss)))/M)^.5*exp(-1i/2*(q_hat+N*(i-1))^2*cot(alpha(ss))*uM^2)*exp(-1i/2*n_hat^2*cot(alpha(ss))*Ts^2)*exp(+1i*2*pi*(q_hat+N*(i-1))*n_hat/M)...
*((sin(-alpha(ss))-1i*cos(-alpha(ss)))/M)^.5*exp(1i/2*m^2*cot(-alpha(ss))*uM^2)*exp(1i/2*(qq+N*(i-1))^2*cot(-alpha(ss))*Ts^2)*exp(-1i*2*pi*m*(qq+N*(i-1))/M)...
*((sin(-alpha(ss))+1i*cos(-alpha(ss)))/M)^.5*exp(-1i/2*m_hat^2*cot(-alpha(ss))*uM^2)*exp(-1i/2*(qq_hat+N*(i-1))^2*cot(-alpha(ss))*Ts^2)*exp(+1i*2*pi*m_hat*(qq_hat+N*(i-1))/M)...
*exp(1i*2*pi/M*(n-n_hat)*e)*exp(-abs(n-m)/gamma)* besselj(0,2*pi*abs(n-n_hat)*fd);
elseif (i==j && k~=k_hat)
p_ICI(ss)=p_ICI(ss)+((sin(-alpha(ss))-1i*cos(-alpha(ss)))/N)^.5*exp(1i/2*k_hat^2*cot(-alpha(ss))*uN^2)*exp(1i/2*q^2*cot(-alpha(ss))*Ts^2)*exp(-1i*2*pi*q*k_hat/N)...
*((sin(-alpha(ss))+1i*cos(-alpha(ss)))/N)^.5*exp(-1i/2*k_hat^2*cot(-alpha(ss))*uN^2)*exp(-1i/2*q_hat^2*cot(-alpha(ss))*Ts^2)*exp(+1i*2*pi*q_hat*k_hat/N)...
* ((sin(alpha(ss))-1i*cos(alpha(ss)))/N)^.5*exp(1i/2*qq^2*cot(alpha(ss))*uN^2)*exp(1i/2*k^2*cot(alpha(ss))*Ts^2)*exp(-1i*2*pi*qq*k/N)...
*((sin(alpha(ss))+1i*cos(alpha(ss)))/N)^.5*exp(-1i/2*qq_hat^2*cot(alpha(ss))*uN^2)*exp(-1i/2*k^2*cot(alpha(ss))*Ts^2)*exp(+1i*2*pi*qq_hat*k/N)...
*((sin(alpha(ss))-1i*cos(alpha(ss)))/M)^.5*exp(1i/2*(q+N*(i-1))^2*cot(alpha(ss))*uM^2)*exp(1i/2*n^2*cot(alpha(ss))*Ts^2)*exp(-1i*2*pi*(q+N*(i-1))*n/M)...
*((sin(alpha(ss))+1i*cos(alpha(ss)))/M)^.5*exp(-1i/2*(q_hat+N*(i-1))^2*cot(alpha(ss))*uM^2)*exp(-1i/2*n_hat^2*cot(alpha(ss))*Ts^2)*exp(+1i*2*pi*(q_hat+N*(i-1))*n_hat/M)...
*((sin(-alpha(ss))-1i*cos(-alpha(ss)))/M)^.5*exp(1i/2*m^2*cot(-alpha(ss))*uM^2)*exp(1i/2*(qq+N*(i-1))^2*cot(-alpha(ss))*Ts^2)*exp(-1i*2*pi*m*(qq+N*(i-1))/M)...
*((sin(-alpha(ss))+1i*cos(-alpha(ss)))/M)^.5*exp(-1i/2*m_hat^2*cot(-alpha(ss))*uM^2)*exp(-1i/2*(qq_hat+N*(i-1))^2*cot(-alpha(ss))*Ts^2)*exp(+1i*2*pi*m_hat*(qq_hat+N*(i-1))/M)...
*exp(1i*2*pi/M*(n-n_hat)*e)*exp(-abs(n-m)/gamma) *besselj(0,2*pi*abs(n-n_hat)*fd);
elseif (i~=j)
p_MUI(ss)=p_MUI(ss)+((sin(-alpha(ss))-1i*cos(-alpha(ss)))/N)^.5*exp(1i/2*k_hat^2*cot(-alpha(ss))*uN^2)*exp(1i/2*q^2*cot(-alpha(ss))*Ts^2)*exp(-1i*2*pi*q*k_hat/N)...
*((sin(-alpha(ss))+1i*cos(-alpha(ss)))/N)^.5*exp(-1i/2*k_hat^2*cot(-alpha(ss))*uN^2)*exp(-1i/2*q_hat^2*cot(-alpha(ss))*Ts^2)*exp(+1i*2*pi*q_hat*k_hat/N)...
* ((sin(alpha(ss))-1i*cos(alpha(ss)))/N)^.5*exp(1i/2*qq^2*cot(alpha(ss))*uN^2)*exp(1i/2*k^2*cot(alpha(ss))*Ts^2)*exp(-1i*2*pi*qq*k/N)...
*((sin(alpha(ss))+1i*cos(alpha(ss)))/N)^.5*exp(-1i/2*qq_hat^2*cot(alpha(ss))*uN^2)*exp(-1i/2*k^2*cot(alpha(ss))*Ts^2)*exp(+1i*2*pi*qq_hat*k/N)...
*((sin(alpha(ss))-1i*cos(alpha(ss)))/M)^.5*exp(1i/2*(q+N*(i-1))^2*cot(alpha(ss))*uM^2)*exp(1i/2*n^2*cot(alpha(ss))*Ts^2)*exp(-1i*2*pi*(q+N*(i-1))*n/M)...
*((sin(alpha(ss))+1i*cos(alpha(ss)))/M)^.5*exp(-1i/2*(q_hat+N*(i-1))^2*cot(alpha(ss))*uM^2)*exp(-1i/2*n_hat^2*cot(alpha(ss))*Ts^2)*exp(+1i*2*pi*(q_hat+N*(i-1))*n_hat/M)...
*((sin(-alpha(ss))-1i*cos(-alpha(ss)))/M)^.5*exp(1i/2*m^2*cot(-alpha(ss))*uM^2)*exp(1i/2*(qq+N*(j-1))^2*cot(-alpha(ss))*Ts^2)*exp(-1i*2*pi*m*(qq+N*(j-1))/M)...
*((sin(-alpha(ss))+1i*cos(-alpha(ss)))/M)^.5*exp(-1i/2*m_hat^2*cot(-alpha(ss))*uM^2)*exp(-1i/2*(qq_hat+N*(j-1))^2*cot(-alpha(ss))*Ts^2)*exp(+1i*2*pi*m_hat*(qq_hat+N*(j-1))/M)...
*exp(1i*2*pi/M*(n-n_hat)*e)*exp(-abs(n-m)/gamma)* besselj(0,2*pi*abs(n-n_hat)*fd);
end
else
p_desired(ss)=p_desired(ss);
p_ICI(ss)=p_ICI(ss);
p_MUI(ss)=p_MUI(ss);
end
end
end
end
end
end
end
end
end
end
end
end
toc
答
- 删除 “
for ss=1:length(alpha)
” 和相应的 “end
” - 转换所有 “
alpha(ss)
” 到 “alpha
” - 转换所有 “
p_desired(ss)
” 到 “p_desired
” - 转换所有 “
p_ICI(ss)
”到“p_ICI
” - 将所有“
p_MUI(ss)
”转换为“p_MUI
“ - 转换所有”
*
”, “/
” 和 “^
” 到 “.*
”, './
' 和 “” 分别.^
。 - 转换 “
elseif (i~=j)
” 到 “else
” - 删除下面的代码:
其他
p_desired(ss)=p_desired(ss); p_ICI(ss)=p_ICI(ss); p_MUI(ss)=p_MUI(ss);
哇........... – NPE 2013-04-07 06:57:54
外貌就像你写了一段代码,写下了这段代码xD – Maroun 2013-04-07 06:59:09
你是从纸上得到这些东西的吗?当我*可以*坐下来研究你的代码在做什么时,我没有时间。如果你能以更容易消化的形式呈现它,我可能会提供帮助。 – 2013-04-07 07:38:16