1.算法运行效果图预览
2.算法运行软件版本
matlab2022a
3.算法理论概述
在OFDM通信系统中,资源分配是一项关键任务,它涉及将可用的频谱资源和功率分配给不同的子载波,以实现高效的数据传输。为了降低计算复杂度并提高系统性能,低复杂度的资源分配算法成为研究的焦点之一。OFDM(正交频分复用)是一种广泛用于无线通信的调制技术,它将高速数据流分成多个低速子流,并将它们调制在不同的正交子载波上。这样可以减少多径干扰,提高频谱利用率。
4.部分核心程序
%子载波分配 [~,pow2] = func_subcarriers_capacity(Ptotal, ch, N_subcarrier, K, noise, gamma); %功率分配 tic ianp = func_power(ch,pow2,N_subcarrier,K,Ptotal,noise,gamma); time_end2 = toc; Avg_time2(ij1) = Avg_time2(ij1) + time_end2; for i=1:K pow1_water(i) = func_waterfilling(shenp(i),pow1(i,:).*ch(i,:)/noise)/N_subcarrier; pow2_water(i) = func_waterfilling(ianp(i),pow2(i,:).*ch(i,:)/noise)/N_subcarrier; end; cap2=cap2+sum(pow1_water); cap1=cap1+sum(pow2_water); if ij2 == 1 cap_m1 = cap_m1 + pow1_water; cap_m2 = cap_m2 + pow2_water; end norm1 = norm1 + norm(pow2_water/sum(pow2_water) - gamma/sum(gamma), inf); norm2 = norm2 + norm(pow1_water/sum(pow1_water) - gamma/sum(gamma), inf); end if ij2 == 1 cap_m1 = cap_m1/(N_ch*MTKL); cap_m2 = cap_m2/(N_ch*MTKL); figure(5); bar([gamma/sum(gamma); cap_m2/sum(cap_m2); cap_m1/sum(cap_m1)]', 'grouped'); legend('Gamma方法', 'LINEAR方法', 'ROOT-FINDING方法'); end; end cap1_mean(ij1)=cap1/(N_ch*MTKL); cap2_mean(ij1)=cap2/(N_ch*MTKL); norm1_mean(ij1) = norm1/(N_ch*MTKL); norm2_mean(ij1) = norm2/(N_ch*MTKL); end figure(1) plot(diff_Vuser,cap1_mean,'-bs',... 'LineWidth',1,... 'MarkerSize',6,... 'MarkerEdgeColor','k',... 'MarkerFaceColor',[0.9,0.0,0.0]); hold on plot(diff_Vuser, cap2_mean,'-r>',... 'LineWidth',1,... 'MarkerSize',6,... 'MarkerEdgeColor','k',... 'MarkerFaceColor',[0.9,0.9,0.0]); grid on xlabel('用户数') ylabel('容量 (bit/s/Hz)') legend('LINEAR', 'ROOT-FINDING'); hold off Avg_time = Avg_time/(N_ch*MTKL); Avg_time2 = Avg_time2/(N_ch*MTKL); figure(3); semilogy(diff_Vuser,Avg_time2,'-bs',... 'LineWidth',1,... 'MarkerSize',6,... 'MarkerEdgeColor','k',... 'MarkerFaceColor',[0.9,0.0,0.0]); hold on semilogy(diff_Vuser,Avg_time,'-r>',... 'LineWidth',1,... 'MarkerSize',6,... 'MarkerEdgeColor','k',... 'MarkerFaceColor',[0.9,0.9,0.0]); grid on xlabel('用户数') ylabel('平均仿真时间 (s)') legend('LINEAR', 'ROOT-FINDING');