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alpha=2%´«Êä·¾¶Ë¥¼õ
pos=100¡Árand(2,2)%ÔÚ100¡Á100µÄ·¶Î§ÄÚ²úÉúÁ½¸ö½Úµã
dis=sqrt((pos(1,1)-pos(2,1))^2+(pos(1,2)-pos(2,2))^2)%¼ÆËãÁ½¸ö½ÚµãµÄ¾àÀë
x=10+rand(1,10)%Ñ¡ÔñÆäÖÐÒ»¸ö½ÚµãΪ·¢Ëͽڵ㣬²úÉúÀëÉ¢Ëæ»úÐźÅ
noise=rand(1,10)%²úÉúÔëÉùÐźÅ
sigpower=sum(x.^2)/length(x);¼ÆËãÀëÉ¢ÐźŵÄÐźÅÄÜÁ¿
noisepower=sum(noise.^2)/length(noise);%¼ÆËãÔëÉùÄÜÁ¿
tranpower=sigpower+noisepower;%´«ÊäµÄ×ÜÐźŵÄÄÜÁ¿
recpower=tranpower*dis^(-alpha);%½ÓÊܽڵãÊÕµ½µÄÐźŵÄÇ¿¶È
snr=20*log10(norm(recpower)/norm(noisepower))
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alpha=2;%´«Êä·¾¶Ë¥¼õ
pos=100*rand(3,2);%ÔÚ100¡Á100µÄ·¶Î§ÄÚ²úÉúÈý¸ö½Úµã
dis1=sqrt((pos(1,1)-pos(2,1))^2+(pos(1,2)-pos(2,2))^2);%¼ÆËã1,2Á½½ÚµãµÄ¾àÀë
dis2=sqrt((pos(1,1)-pos(3,1))^2+(pos(1,2)-pos(3,2))^2);%¼ÆËã1,3Á½½ÚµãµÄ¾àÀë
x2=10+rand(1,10);%2Ϊ·¢Ëͽڵ㣬²úÉúÀëÉ¢Ëæ»úÐźÅ
x3=10+rand(1,10);%3Ϊ·¢Ëͽڵ㣬²úÉúÀëÉ¢Ëæ»úÐźÅ
noise2=rand(1,10);%½Úµã2µÄÔëÉùÐźÅ
noise3=rand(1,10);%½Úµã3µÄÔëÉùÐźÅ
sigpower2=sum(x2.^2)/length(x2);¼ÆËã½Úµã2ÀëÉ¢ÐźŵÄÐźÅÄÜÁ¿
sigpower3=sum(x3.^2)/length(x3);¼ÆËã½Úµã3ÀëÉ¢ÐźŵÄÐźÅÄÜÁ¿
noisepower2=sum(noise2.^2)/length(noise2);%¼ÆËãÔëÉùÄÜÁ¿
noisepower3=sum(noise3.^2)/length(noise3);%¼ÆËãÔëÉùÄÜÁ¿
tranpower2=sigpower2+noisepower2;%½Úµã2´«ÊäµÄ×ÜÐźŵÄÄÜÁ¿
tranpower3=sigpower3+noisepower3;%½Úµã3´«ÊäµÄ×ÜÐźŵÄÄÜÁ¿
recpower2=tranpower2*dis^(-alpha);%½ÓÊܽڵãÊÕµ½µÄÐźŵÄÇ¿¶È
recpower3=tranpower3*dis^(-alpha);%½ÓÊܽڵãÊÕµ½µÄÐźŵÄÇ¿¶È
snr2=20*log10(norm(recpower2)/norm(noisepower)+norm(recpower3))
snr3=20*log10(norm(recpower3)/norm(noisepower)+norm(recpower2))
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