单载波频域均衡(SC-FDE) 的设计

function [soft_bits,evm] = rx_qam64_demod(rx_symbols) soft_bits = zeros(6,length(rx_symbols)); % Each symbol consists of 6 bits bit2=zeros(1,length(rx_symbols)); bit5=zeros(1,length(rx_symbols)); bit0 = real(rx_symbols); for i=1:length(rx_symbols) if(bit0(i)>0) bit0(i)=1; else bit0(i)=0; end end bit3 = imag(rx_symbols); for i=1:length(rx_symbols) if(bit3(i)>0) bit3(i)=1; else bit3(i)=0; end end bit1 = 4/sqrt(42)-abs(real(rx_symbols)); for i=1:length(rx_symbols) if(bit1(i)>0) bit1(i)=1; else bit1(i)=0; end end bit4 = 4/sqrt(42)-abs(imag(rx_symbols)); for i=1:length(rx_symbols) if(bit4(i)>0) bit4(i)=1; else bit4(i)=0; end end for m=1:length(rx_symbols) if abs(4/sqrt(42)-abs(real(rx_symbols(m))))<=2/sqrt(42) % bit is one bit2(m) = 1; else bit2(m) = 0; % bit is zero end; if abs(4/sqrt(42)-abs(imag(rx_symbols(m)))) <= 2/sqrt(42) % bit is one bit5(m) = 1; else bit5(m) = 0; end; end; soft_bits(1,:) = bit0; soft_bits(2,:) = bit1; soft_bits(3,:) = bit2; soft_bits(4,:) = bit3; soft_bits(5,:) = bit4; soft_bits(6,:) = bit5; evm_real=zeros(1,length(rx_symbols)); evm_image=zeros(1,length(rx_symbols)); for i=1:length(rx_symbols) soft_bits_i=soft_bits(:,i); if(soft_bits_i==[0;0;0;1;0;0]) evm_real(i)=real(rx_symbols(i))+7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[0;0;1;1;0;0]) evm_real(i)=real(rx_symbols(i))+5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[0;1;1;1;0;0]) evm_real(i)=real(rx_symbols(i))+3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[0;1;0;1;0;0]) evm_real(i)=real(rx_symbols(i))+1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[1;1;0;1;0;0]) evm_real(i)=real(rx_symbols(i))-1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[1;1;1;1;0;0]) evm_real(i)=real(rx_symbols(i))-3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[1;0;1;1;0;0]) evm_real(i)=real(rx_symbols(i))-5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[1;0;0;1;0;0]) evm_real(i)=real(rx_symbols(i))-7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-7/sqrt(42); elseif(soft_bits_i==[0;0;0;1;0;1]) evm_real(i)=real(rx_symbols(i))+7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[0;0;1;1;0;1]) evm_real(i)=real(rx_symbols(i))+5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[0;1;1;1;0;1]) evm_real(i)=real(rx_symbols(i))+3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[0;1;0;1;0;1]) evm_real(i)=real(rx_symbols(i))+1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[1;1;0;1;0;1]) evm_real(i)=real(rx_symbols(i))-1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[1;1;1;1;0;1]) evm_real(i)=real(rx_symbols(i))-3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[1;0;1;1;0;1]) evm_real(i)=real(rx_symbols(i))-5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[1;0;0;1;0;1]) evm_real(i)=real(rx_symbols(i))-7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-5/sqrt(42); elseif(soft_bits_i==[0;0;0;1;1;1]) evm_real(i)=real(rx_symbols(i))+7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[0;0;1;1;1;1]) evm_real(i)=real(rx_symbols(i))+5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[0;1;1;1;1;1]) evm_real(i)=real(rx_symbols(i))+3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[0;1;0;1;1;1]) evm_real(i)=real(rx_symbols(i))+1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[1;1;0;1;1;1]) evm_real(i)=real(rx_symbols(i))-1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[1;1;1;1;1;1]) evm_real(i)=real(rx_symbols(i))-3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[1;0;1;1;1;1]) evm_real(i)=real(rx_symbols(i))-5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[1;0;0;1;1;1]) evm_real(i)=real(rx_symbols(i))-7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-3/sqrt(42); elseif(soft_bits_i==[0;0;0;1;1;0]) evm_real(i)=real(rx_symbols(i))+7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[0;0;1;1;1;0]) evm_real(i)=real(rx_symbols(i))+5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[0;1;1;1;1;0]) evm_real(i)=real(rx_symbols(i))+3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[0;1;0;1;1;0]) evm_real(i)=real(rx_symbols(i))+1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[1;1;0;1;1;0]) evm_real(i)=real(rx_symbols(i))-1/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[1;1;1;1;1;0]) evm_real(i)=real(rx_symbols(i))-3/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[1;0;1;1;1;0]) evm_real(i)=real(rx_symbols(i))-5/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[1;0;0;1;1;0]) evm_real(i)=real(rx_symbols(i))-7/sqrt(42); evm_image(i)=imag(rx_symbols(i))-1/sqrt(42); elseif(soft_bits_i==[0;0;0;0;1;0]) evm_real(i)=real(rx_symbols(i))+7/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[0;0;1;0;1;0]) evm_real(i)=real(rx_symbols(i))+5/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[0;1;1;0;1;0]) evm_real(i)=real(rx_symbols(i))+3/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[0;1;0;0;1;0]) evm_real(i)=real(rx_symbols(i))+1/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[1;1;0;0;1;0]) evm_real(i)=real(rx_symbols(i))-1/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[1;1;1;0;1;0]) evm_real(i)=real(rx_symbols(i))-3/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[1;0;1;0;1;0]) evm_real(i)=real(rx_symbols(i))-5/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[1;0;0;0;1;0]) evm_real(i)=real(rx_symbols(i))-7/sqrt(42); evm_image(i)=imag(rx_symbols(i))+1/sqrt(42); elseif(soft_bits_i==[0;0;0;0;1;1]) evm_real(i)=real(rx_symbols(i))+7/sqrt(42); evm_image(i)=imag(rx_symbols(i))+3/sqrt(42); elseif(soft_bits_i==[0;0;1;0;1;1]) evm_real(i)=real(rx_symbols(i))+5/sqrt(42); evm_image(i)=imag(rx_symbols(i))+3/sqrt(42); elseif(soft_bits_i==[0;1;1;0;1;1]) evm_real(i)=real(rx_symbols(i))+3/sqrt(42); evm_image(i)=imag(rx_symbols(i))+3/sqrt(42); elseif(soft_bits_i==[0;1;0;0;1;1]) evm_real(i)=real(rx_symbols(i))+1/sqrt(42); evm_image(i)=imag(rx_sy