一个信道增益相关的小程序，Matlab仿真

% 信道增益在一定范围内分布，多个信道增益取平均值，看平均值的误差与信道个数之间的关系； % 信道增益按这个公式取pathloss_dB=15.3+37.6*log10(mDistance)； % distance选10到50m； % 注意pathloss是db数，变回实际数值，然后取平均，然后计算差值，计算差值与原信号的比例， % 画出这个比例与信道数目之间的关系 % dB2ratio % dB转换公式：ratio=exp(-dB/10) % 正式程序 max_channel_count = 500; min_distance = 100; max_distance = 500; x = 0; figure; plot(x, 0, 'r-', 'MarkerSize', 6); title_string = '参数情况：最大信道个数：%d 距离范围:%d-%d'; parameters_info = sprintf(title_string, max_channel_count, min_distance, max_distance); title(parameters_info); % title(['信道数关系 ', '最大信道数：', max_channel_count, '距离范围：', min_distance, '——', max_distance]); xlabel('信道个数'); ylabel('比例'); hold on last_value = 0; for channel_count = 1:max_channel_count distances = RandNumbers(channel_count, min_distance, max_distance); dB_gains = ChannelGain(distances); normal_gains = dB2Ratio(dB_gains); differences = abs(normal_gains - mean(normal_gains)); ratios = abs(differences ./ normal_gains); plot([channel_count-1, channel_count], [last_value, mean(ratios)], 'r-', 'MarkerSize', 6); last_value = mean(ratios); drawnow; end