How to generate Noncoherent BFSK in awgn?

clear N = 10^6 % number of bits or symbols ip = rand(1,N)>0.5;

s = 2*ip-1;

n = 1/sqrt(2)*[randn(1,N) + j*randn(1,N)];

Eb_N0_dB = [-3:10]; % multiple Eb/N0 values

for ii = 1:length(Eb_N0_dB)

   y = s + 10^(-Eb_N0_dB(ii)/20)*n; 

   ipHat = real(y)>0;

     nErr(ii) = size(find([ip- ipHat]),2);

end

simBer = nErr/N;

theoryBer = 0.5*erfc(sqrt(10.^(Eb_N0_dB/10))); % plot close all figure semilogy(Eb_N0_dB,theoryBer,'b.-');

hold on semilogy(Eb_N0_dB,simBer,'m*-'); axis([-3 10 10^-5 0.5])

grid on legend('theory', 'simulation'); xlabel('Eb/No, dB'); ylabel('Bit Error Rate');

title('Bit error probability curve for BPSK modulation');

For BPSK,I did this..Similarly how to generate for noncoherent BFSK? Thanks in advance..