资源简介
基于子空间的旋转不变算法ESPRIT,可估计输入信号的到达角、离开角

代码片段和文件信息
function y=awgn(varargin)
%AWGN Add white Gaussian noise to a signal.
% Y = AWGN(XSNR) adds white Gaussian noise to X. The SNR is in dB.
% The power of X is assumed to be 0 dBW. If X is complex then
% AWGN adds complex noise.
%
% Y = AWGN(XSNRSIGPOWER) when SIGPOWER is numeric it represents
% the signal power in dBW. When SIGPOWER is ‘measured‘ AWGN measures
% the signal power before adding noise.
%
% Y = AWGN(XSNRSIGPOWERS) uses S which is a random stream handle to
% generate random noise samples with RANDN. If S is an integer then
% resets the state of RANDN to S. The latter usage is obsoleted and may
% be removed in a future release. If you want to generate repeateable
% noise samples then provide the handle of a random stream or use reset
% method on the default random stream. Type ‘help RandStream‘ for more
% information.
%
% Y = AWGN(XSNRSIGPOWERSTATE) resets the state of RANDN to STATE.
% This usage is deprecated and may be removed in a future release.
%
% Y = AWGN(... POWERTYPE) specifies the units of SNR and SIGPOWER.
% POWERTYPE can be ‘db‘ or ‘linear‘. If POWERTYPE is ‘db‘ then SNR
% is measured in dB and SIGPOWER is measured in dBW. If POWERTYPE is
% ‘linear‘ then SNR is measured as a ratio and SIGPOWER is measured
% in Watts.
%
% Example 1:
% % To specify the power of X to be 0 dBW and add noise to produce
% % an SNR of 10dB use:
% X = sqrt(2)*sin(0:pi/8:6*pi);
% Y = awgn(X100);
%
% Example 2:
% % To specify the power of X to be 3 Watts and add noise to
% % produce a linear SNR of 4 use:
% X = sqrt(2)*sin(0:pi/8:6*pi);
% Y = awgn(X43‘linear‘);
%
% Example 3:
% % To cause AWGN to measure the power of X and add noise to
% % produce a linear SNR of 4 use:
% X = sqrt(2)*sin(0:pi/8:6*pi);
% Y = awgn(X4‘measured‘‘linear‘);
%
% Example 4:
% % To specify the power of X to be 0 dBW add noise to produce
% % an SNR of 10dB and utilize a local random stream use:
% S = RandStream(‘mt19937ar‘‘seed‘5489);
% X = sqrt(2)*sin(0:pi/8:6*pi);
% Y = awgn(X100S);
%
% Example 5:
% % To specify the power of X to be 0 dBW add noise to produce
% % an SNR of 10dB and produce reproducible results use:
% reset(RandStream.getDefaultStream)
% X = sqrt(2)*sin(0:pi/8:6*pi);
% Y = awgn(X100S);
%
%
% See also WGN RANDN RandStream/RANDN and BSC.
% Copyright 1996-2008 The MathWorks Inc.
% $Revision: 1.9.4.7 $ $Date: 2009/01/05 17:45:01 $
% --- Initial checks
error(nargchk(25nargin‘struct‘));
% --- Value set indicators (used for the string flags)
pModeSet = 0;
measModeSet = 0;
% --- Set default values
sigPower = 0;
pMode = ‘db‘;
measMode = ‘specify‘;
state = [];
% --- Placeholder for the signature string
sigSt
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 817 2013-09-03 21:23 main.m
文件 1584 2010-10-25 11:20 tls_esprit.m
文件 6522 2013-09-03 16:19 wgn.m
文件 8109 2013-09-03 08:17 awgn.m
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