QAM.rar_matlab q_matlab qam_modulation_qam_调制程序 matlab

function y = qammod(x,M, varargin) %QAMMOD Quadrature amplitude modulation % error checks if(nargin>3) error('comm:qammod:numarg','Too many input arguments.'); end %Check x, ini_phase if ( ~isreal(x) || any(any(ceil(x)~=x)) || ~isnumeric(x) ) error('comm:qammod:xreal','Elements of input X must be integers in [0, M-1].'); end if(~isreal(M) || ~isscalar(M) || M<=0 || (ceil(M)~=M) || ~isnumeric(M) ) error('comm:qammod:Mreal','M must be a positive integer.'); end if( ~isnumeric(M) || ceil(log2(M)) ~= log2(M)) error('comm:qammod:Mpow2','M must be in the form of M = 2^K, where K is an integer. '); end % check that X are all integers within range. if (min(min(x)) < 0) || (max(max(x)) > (M-1)) error('comm:qammod:xreal','Elements of input X must be integers in [0, M-1].'); end if(nargin==3) ini_phase = varargin{1}; if(isempty(ini_phase)) ini_phase = 0; elseif(~isreal(ini_phase) || ~isscalar(ini_phase) ) error('comm:qammod:ini_phaseReal','INI_PHASE must be a real scalar.'); end else ini_phase = 0; end const = squareqamconst(M,ini_phase); y = genqammod(x,const); % --- EOF --- %