run_lms_mvdr.m
上传用户:kendun0711
上传日期:2007-06-03
资源大小:32k
文件大小:1k
- function run_lms_mvdr(rp)
- % Computer Experiment
- % Section 9.8, Adaptive Filter Theory, 3rd edition
- % MVDR adaptive beamforming using the LMS algorithm
- Ninit = rp.p;
- Ndata = Ninit + rp.Nsnaps;
- seed = 1;
- % A_i, phi_l are target signal amplitude/elec- angle
- % A_2, phi_2 are interference signal amplitude/elec- angle
- % s is steering vector along elec. angle of look direction of interest
- A_1 = sqrt(rp.var_v) * 10^(rp.TNRdB/20);
- phi_1 = pi * rp.sin_theta_1;
- A_2 = sqrt(rp.var_v) * 10^(rp.INRdB/20);
- phi_2 = pi * rp.sin_theta_2;
- s = exp(-j*[0:(rp.p-1)]'*phi_1);
- e = s(2:rp.p);
- % setup input/output sequences
- for i = 1:Ndata,
- % setup random disturbances
- randn('seed', i);
- vr = sqrt(rp.var_v/2) * randn(1, rp.p) + rp.mean_v;
- vi = sqrt(rp.var_v/2) * randn(1, rp.p) + rp.mean_v;
- v = vr + j*vi;
- rand('seed', i);
- Psi = 2*pi*rand(1);
- Xi(i, :) = A_1*exp(j*[1:rp.p]*phi_1) + A_2*exp(j*[1:rp.p]*phi_2 + Psi) + v;
- end;
- % setup effective desired output and input vectors from
- % original data
- g = 1;
- d = g * Xi(:, 1);
- u = diag(Xi(:, 1)) * (ones(Ndata, 1) * e.') - Xi(:, 2:rp.p);
-
- [W, xp] = lms(u, d, rp.mu, rp.decay, rp.verbose);
- Wo = g - W * conj(e);
- W = [Wo W];
- eval(['save ' rp.name])