bit2esgsymbolmapping.m

安捷仑的数字调制信号发生器E4438用于很多通信系统的开发过程中。本代码可以用于通过网络接口或GPIB接口向E4438下载被调制数据

function[symbol] = bit2ESGsymbolmapping(input_bits)

% BIT2SYMBOL MAPPING
output_sym = [];

for index = 1:2:length(input_bits)
    if  input_bits(index) == 0
        if input_bits(index+1) == 0
            output_sym(0.5*(index+1)) = 0.06;%1;  %00
        else
            output_sym(0.5*(index+1)) = 0.18;%3;  %01
        end
    else    %input_bits = 1
        if input_bits(index+1) == 0
            output_sym(0.5*(index+1)) = -0.06;%-1  %10
        else
            output_sym(0.5*(index+1)) = -0.18;%-3; %11
        end
    end
end
symbol = [output_sym];    %convert to the DSP levels