802.11n信道模型matlab代码.doc

文档介绍：function [R, Q, sigma_deg] = correlation(M, spacing, d_norm, ...
cluster_number, amplitude_cluster, ...
PAS_type, phi_deg, AS_deg, ...
delta_phi_deg, type)
% [R, Q, sigma_deg] = correlation(M, spacing, d_norm,
% cluster_number, amplitude_cluster, PAS_type,
% phi_deg, AS_deg, delta_phi_deg, type)
%
% Derives the correlation matrix R from the description of the
% environment, namely the antenna element spacing and the way the
% waves impinge (number of clusters, PAS type, AS and mean angle of
% incidence). The generated correlation coefficients are either
% (complex) field correlation coefficients (type = 0) or (real
% positive) power correlation coefficients (type = 1).
%
% Inputs
%
% * Variable M, number of antenna elements of the ULA
% * Variable spacing, spacing of the antenna elements of the ULA
% * Vector d_norm, containing the relative spacings of the M
% elements of the ULA with respect to the first one
% * Variable cluster_number, number of impinging clusters
% * Vector amplitude_cluster, containing the amplitude of
% the cluster_number impinging clusters
% * Variable PAS_type, defines the nature of the PAS, isotropic
% uniform (1), isotropic Gaussian (2), isotropic Laplacian (3)
% or directive Laplacian (6) according to 3GPP-3GPP2 SCM AHG
% radiation pattern
% * Vector phi_deg, containing the AoAs of the number_cluster
% clusters
% * Vector AS_deg, containing the ASs of the number_cluster
% clusters
% * Vector delta_phi_deg, containing the constraints limits
% of the truncated PAS, if applicable (Gaussian and Laplacian
% case)
% * Variable type, defines whether correlation properties
% should puted in field (0) or in power (1)
%
% Outputs
%
% * 2-D Hermitian matrix R of size M x M, whose elements are
% the correlation coefficients of the corresponding elements
% of the ULA impinged by the described PAS
%Vector Q of cluster_number elements, giving the normalisation
% coefficients to be applied to the clusters in