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How to code the equation below?

19 ビュー (過去 30 日間)
Athira T Das
Athira T Das 2024 年 5 月 20 日 17:25
回答済み: William Rose 2024 年 5 月 20 日 18:13
I have an equation to code
To sigmaI, I is used, which is a 512*512 matrix. Also I need to calculate BER also. The equation is
The code that I wrote is,
clc;close all;clear all;
lambda = 532;
k = 2*pi/lambda;
z=[1.03700000000000 1.39100000000000 1.59800000000000 1.84800000000000 1.88900000000000 2.01400000000000 2.34800000000000 2.45100000000000 2.57600000000000 2.72200000000000 2.78500000000000 2.88900000000000 2.97200000000000 3.16000000000000 3.20200000000000 3.36900000000000 3.41100000000000 3.51500000000000 3.55700000000000 3.57700000000000 3.66100000000000 3.66100000000000 3.68100000000000 3.70200000000000 3.74400000000000 3.82800000000000 3.93200000000000 4.05700000000000 4.18200000000000 4.55600000000000 4.70200000000000 4.91000000000000 5.01500000000000 5.16100000000000 5.24400000000000 5.26500000000000 5.28600000000000 5.28600000000000 5.28600000000000 5.24400000000000 5.26400000000000 5.22300000000000 5.39000000000000 5.57700000000000 5.72200000000000 5.93100000000000 6.16000000000000 6.41000000000000 6.63800000000000 6.88800000000000 7.03400000000000 7.24200000000000 7.34700000000000 7.45100000000000 7.53400000000000 7.63900000000000 7.68000000000000 7.80500000000000 7.82600000000000 7.95100000000000 8.09700000000000 8.20100000000000 8.30600000000000 8.47200000000000 8.66000000000000 8.82600000000000 8.97200000000000 9.07700000000000 9.18100000000000 9.24300000000000 9.28400000000000 9.32600000000000 9.34700000000000 9.34700000000000 9.36800000000000 9.36800000000000 9.40900000000000 9.47200000000000 9.51400000000000 9.57600000000000 9.65900000000000 9.74200000000000 9.84600000000000 9.99200000000000 10.1790000000000 10.5130000000000 10.5760000000000 10.9710000000000 11.1380000000000 11.3260000000000 11.4090000000000 11.4710000000000 11.5130000000000 11.5550000000000 11.6170000000000 11.7000000000000 11.8250000000000 11.8870000000000 12.2830000000000 12.4910000000000 12.6370000000000 12.8040000000000 12.9490000000000 13.1150000000000 13.2610000000000 13.5540000000000 13.6790000000000 13.8240000000000 13.9080000000000 14.3040000000000 14.3870000000000 14.4910000000000 14.5740000000000 14.6370000000000 14.7620000000000 14.8450000000000 14.9490000000000 15.0320000000000 15.1370000000000 15.2820000000000 15.3650000000000 15.5320000000000 15.6160000000000 15.7410000000000 15.8870000000000 16.0530000000000 16.1570000000000 16.3650000000000 16.5940000000000 16.7400000000000 16.8650000000000 16.9280000000000 17.0530000000000 17.0950000000000 17.1780000000000 17.2200000000000 17.3030000000000 17.3440000000000 17.5530000000000 17.6980000000000 17.8020000000000 17.9900000000000 18.1360000000000 18.3650000000000 18.5740000000000 18.8030000000000 18.9900000000000 19.1980000000000 19.5100000000000 19.6560000000000 19.8430000000000 19.9690000000000 20.0940000000000 20.1760000000000 20.3220000000000 20.4680000000000 20.5930000000000 20.7590000000000 20.9050000000000 21.0510000000000 21.1970000000000 21.4260000000000 21.5920000000000 21.7170000000000 21.9050000000000 22.0300000000000 22.2180000000000 22.3430000000000 22.5510000000000 22.8420000000000 23.0920000000000 23.1960000000000 23.4250000000000 23.5920000000000 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99.7940000000000 99.9190000000000 100.044000000000];
z_diff = (diff(z)) ;
z_diff = [0 z_diff];
tilt_angle=10;
beta=(pi/180)*tilt_angle;
Lx = 0.1;
Ly = Lx;
Nx = 512;
Ny = Nx ;
dx = Lx/Nx;
dy = Ly/Ny;
x = (-Nx/2:Nx/2-1)*dx;
y = (-Ny/2:Ny/2-1)*dy;
[X,Y] = meshgrid(x,y);
r = sqrt(X.^2 + Y.^2);
kx = meshgrid(-Nx/2:Nx/2-1)/(Nx.*dx);
ky = meshgrid(-Ny/2:Ny/2-1)/(Ny.*dy);
kz = ones(Nx);
Kx=cos(beta).*kx + sin(beta).*kz;
Ky=ky;
Kz=-sin(beta).*kx + cos(beta).*kz;
K2 = Kx.^2 + Ky.^2 + Kz.^2;
delfx = 1/(Lx);
delfy = delfx;
R = randn(Nx,Ny) ;
R = R - mean(R(:,:));
R = R/std(R(:,:));
Phi = [2.50310494762771e-07 2.50946965543003e-07 4.74127533715154e-07 5.24210357233832e-06 2.42362427581638e-07 1.42653443399616e-07 5.16930235276850e-07 9.04590700562310e-07 2.29541191637123e-06 3.60105794008093e-07 9.17845719860523e-08 2.50390367004531e-07 1.09738615765455e-06 1.00311041468925e-06 6.50810613011221e-08 3.02640252523566e-07 5.31047019902531e-07 1.80313245178286e-06 3.04099822876624e-06 1.47008194185741e-07 4.08290582950848e-08 3.82118426499270e-06 5.29334397036188e-07 4.87810778598663e-06 1.18782521297988e-06 1.16666772914768e-06 1.69778706192608e-06 7.67426466736916e-06 5.27799451227444e-06 4.23216916272082e-07 2.66828750584071e-05 2.46205729358867e-06 2.80169965568206e-06 2.97378024567976e-07 2.21170607901861e-07 3.41285818450589e-07 3.85275104621375e-08 4.05141179263807e-07 1.17629321652161e-06 4.95233464403551e-06 1.80125151270180e-06 2.81483058944610e-07 1.24528365857859e-05 6.86781782456521e-06 2.95828059847895e-06 1.27035361174474e-06 6.34388599513081e-07 2.32012818083199e-06 2.81784487117724e-06 1.46096455213802e-06 1.60178082889894e-06 1.94791694377124e-07 6.35459501021705e-08 8.30940388112504e-08 2.53354933929590e-07 4.31247522543152e-06 9.63180625859285e-07 8.03726503455623e-07 2.98282116276067e-07 9.25402679823575e-08 1.61856374619784e-07 1.73242501417858e-07 2.31570160754109e-07 1.78600321810053e-07 1.25598618058698e-07 1.63418364388577e-06 1.02774042441542e-06 8.32018926678718e-08 2.53586554087675e-07 2.53508325030189e-07 4.07413642129177e-08 2.42096085408459e-07 5.91587468209778e-07 1.27761778023523e-07 1.65773731666773e-07 1.79565395840267e-07 3.78521468221561e-07 1.21471607158554e-07 3.25378687175317e-07 1.25569084575180e-07 5.49035746100893e-08 4.07733632799329e-08 4.79103771763424e-07 3.27135102365317e-07 2.10496092551324e-07 1.33641668807187e-06 1.68227872575447e-06 1.52265748820018e-06 2.53683706505161e-07 1.25630494723704e-07 1.12347756326375e-06 2.53692684133802e-07 2.10500428113819e-07 2.52934873659000e-07 6.77249701528946e-07 2.95386782896753e-07 3.16617852613830e-07 3.59879226900604e-07 2.81244834536819e-07 2.35438339516804e-07 3.40806542459708e-07 6.44683615098099e-08 5.05945401350734e-07 2.57387924440325e-07 7.82108421793457e-08 2.52513556939930e-07 7.41154472489689e-08 8.95664707278605e-08 3.44823854262242e-07 2.57498619329261e-07 2.07939465354519e-06 7.18570183290631e-07 3.25198024230522e-07 2.11933525065655e-07 8.30783371984955e-08 1.65710628194624e-07 5.48396993890243e-08 5.95342783012939e-08 2.28819020334242e-07 1.99067722101735e-07 2.40425372248607e-07 2.51916559208949e-07 2.98446361528618e-07 2.82958505602994e-07 2.10599141757522e-07 4.60997674322361e-08 2.59856693650578e-07 1.47642122461920e-07 3.93574284250877e-07 3.94729289526600e-08 6.37347851352551e-08 2.51536627057736e-07 2.28438571372065e-07 1.90144303446780e-07 4.73626330414131e-08 6.44142268235402e-08 1.72106272576708e-06 1.70721924857358e-06 2.94643811973548e-07 3.55943119776846e-08 9.36518317402136e-08 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1.70720547021041e-07 2.19582224668132e-07 2.05914598785446e-07 1.14899310738254e-06 1.03415047080757e-07 1.89177690522258e-06 2.24175047702725e-07 3.76150153666139e-07 9.18124634120261e-08 2.27678254839140e-07 8.61346207114181e-08 3.38947999645138e-06 1.71880093129416e-07 2.22461873169689e-07 3.72427593494344e-08 6.76102058093114e-08 1.13163515787091e-06 7.04052219453715e-07 3.28310827940334e-07 2.12060821359437e-07 2.68576701610855e-07 2.04744061114503e-07 1.14622616867334e-07 4.35675529886048e-08 5.29665131717990e-08 3.50574437154752e-08 5.32920831968263e-08 1.04801149974382e-07 2.08316009852988e-07 2.77349913208742e-07 1.48756450473382e-07 3.78517042358300e-07 1.19222278136494e-07 4.57902170141890e-08 2.03249187200450e-07 9.32437812713631e-08 6.61503340988668e-07 1.01572927594225e-06 3.26294032932256e-07 2.26313604682662e-07 7.01012285236915e-08 7.61666326540900e-08 4.16954886967803e-08 4.41719683698357e-08 4.02549730011751e-08 4.41603434482274e-08 3.50371730851861e-08 3.00718061774876e-07 3.50372423542925e-08 5.32741630316562e-08 2.09046711312522e-07 3.75611845531339e-06 2.26535469768828e-07 4.62710159517236e-07 5.55357457448765e-07 4.16702305525217e-07 2.05922476618442e-07 2.06490274401431e-07 2.33754328058605e-07 1.66615319203810e-07 2.13390792614979e-07 2.54792444311713e-07 4.20241426628409e-07 6.95047952441784e-07 6.02254152247896e-07 1.56218004764843e-07 1.99836446669293e-07 1.62974708502310e-07 2.93420921132526e-07 1.67909832369442e-07 1.53692619622575e-07 8.89709805825161e-08 1.64148574413349e-07 1.82871518257336e-07 1.99566615308843e-07 1.59784291140960e-07 1.87893662090374e-07 2.77364481028229e-07 1.10443572547260e-07 2.18556580353372e-07 1.83932131011210e-07 7.94652011731045e-08 2.43919458395486e-07 1.59781205439559e-07 1.94642054497664e-07 1.29989372686070e-07 1.90910393259075e-07 2.84452061601644e-07 3.30006526167654e-07 1.93485493531741e-07 2.40209860863182e-07 4.15333943239071e-07 2.91343651778087e-07 2.58377576473351e-07 1.81274762632482e-07 1.88893039486970e-07 2.19428417763272e-07 2.20994023873646e-07 2.27950728874121e-07 1.64400439994395e-07 1.00341668297253e-07 1.67577483763212e-07 5.61980802260245e-08 3.04539633123467e-08 3.19018898206730e-08 3.89504322796163e-08 3.19941498021468e-07 5.41874921040340e-06 1.01776790218898e-06 1.29079721421378e-06 5.77887058141474e-07 2.79939362285509e-07 5.55989804582382e-08 2.11144624551603e-07 5.73140726411827e-08 5.35992572193921e-08 2.80066251579433e-07 1.76964657359828e-07 3.25199602895421e-07 2.18271466195228e-07 1.80628024038326e-07 4.69550563668357e-08 1.48055689005769e-07 1.82317859358405e-07 1.33063533148151e-07 2.62672490298873e-08 2.52416541944235e-08 2.08244390466210e-07 3.06261128674104e-07 2.18183988930487e-07 1.32114003617060e-07 3.13731744862144e-07 2.78980205382911e-07 2.42110700965470e-08 1.28818767334643e-07 3.48416502648141e-07 1.43250842379859e-07 2.58790299254369e-08 2.36803673262810e-08 2.54679999490770e-08 1.53423624973069e-07 2.11044574009824e-07 2.45219073821534e-08 5.40329423903049e-08 4.07828910547019e-08 2.86866659397290e-08 5.74108869690081e-08 3.17780519921456e-08 2.89072270765441e-07 6.46668413187508e-08 3.89801393203052e-07 1.62322978572959e-07 2.69026419637955e-07 4.76120100475985e-07 5.32185045407108e-07 1.57575408820348e-07 2.08858600548085e-07 1.87565977660685e-07 2.01108310997773e-07 3.95620143987532e-08 5.24866345380986e-08 8.64930520826212e-08 9.74072997804584e-07 2.54439638933078e-08 1.00154777975012e-07 9.42429455464106e-07 2.23088555779751e-07 2.02097796370716e-07 1.99163165408265e-07 9.26536634692885e-08 1.31298738607173e-07 1.97726692783641e-07 2.28150683478771e-07 2.17170907865184e-07 2.69677497220439e-08 1.54765400027711e-07 6.26255760215395e-08 1.46771827369792e-07 1.81515822529873e-07 1.72918459779846e-07 8.15990146285526e-08 9.85514009220808e-08 7.03396855430348e-07 5.93657045438661e-07 1.51834395684521e-07 9.76927764035926e-08 1.18527867299870e-07 2.71435324116586e-08 5.68571003566081e-08 1.65983256102705e-07 2.29129793972797e-07 5.88646431511064e-08 3.08684402204026e-05 2.38265317337181e-06 4.30752744717656e-07 1.04689461805175e-07 2.32270648752108e-07 6.07211466407868e-07 1.95341105985221e-08 7.38231690963101e-08 1.95129857199575e-07 4.01671898332107e-08 4.75072551754564e-08 2.49046064060719e-06 1.78142428447807e-07 2.60935684174315e-07 4.29594269700864e-08 1.14070714922750e-07 5.26390027271695e-08 6.74132420131039e-08 2.11045265009953e-07 7.27021148761358e-07 2.83886081059763e-07 2.76343292567963e-08 1.61294742863238e-07 1.83304573271511e-07 2.45251911632262e-07 9.18095053702886e-07 9.40457085677553e-07 2.90451584499496e-07 1.04003175628026e-07 1.08284695915254e-07 5.44402482199441e-08 2.02578013696944e-08 5.88615942025308e-08 1.04406254724335e-07 1.20598226687063e-07 5.71264670628078e-07 3.15144191075623e-07 2.23052176438872e-08 2.98936409995515e-08 2.92428609360162e-07 2.47505388371339e-07 2.72866577624107e-07 2.69881858030521e-07 1.85519336468060e-07 2.56402576998181e-07 8.88653855726949e-08 1.23281438816645e-07 3.74059740200056e-08 3.63466577344003e-08 1.20887062612203e-06 5.31728280982040e-07 2.22245937870703e-08 1.24471844746278e-07 5.11735373064063e-07 3.13008213548308e-07 5.70247343660301e-08 7.23194564373494e-07 1.79616235944090e-07 6.78737172874271e-08 1.87999018332358e-07 1.56051038058590e-07 2.31029093824182e-08 3.65957708093627e-08 5.13581582166058e-07 2.55008648105981e-08 1.44166238137747e-07 3.81609462756446e-07 2.16242665285891e-07 2.34087134829968e-07 2.55408939395098e-07 5.31844204547311e-08 1.37230800917903e-07 2.24923680386313e-07 7.91242025449375e-08 1.56574476334133e-07 1.34926252415438e-07 1.70013819330808e-08 1.48130847036606e-07 1.10651211565701e-07 1.58123074045499e-07 1.47865663105776e-07 1.14316450201195e-07 2.02955526741989e-08 1.49518466142608e-07 2.99469635848321e-08 4.06175629714119e-07 2.32871553385763e-07 1.70948094081342e-07 1.86984334344187e-07 1.54774299548728e-07 1.27005955203776e-07 7.29605614875902e-08 4.26639317987837e-08 5.91930531596668e-08 1.50666658228087e-08 4.86748534643297e-08 1.64538615062307e-08 1.32252962938291e-07 1.06729078335828e-07 1.39785078669013e-07 1.39779800669610e-07 9.26422941859900e-08 1.13233915195479e-07 8.32946711657419e-08 1.67451405167575e-07 3.65621117891888e-08 2.21661117907828e-07 3.65652178907218e-08 1.41441861581090e-06 3.30075312403152e-07 2.05346680636497e-08 2.16432978289422e-07 1.92694668921994e-07 1.99379501668891e-07 2.60904461669433e-07 2.16709099204294e-07 1.33136064843243e-07 1.52413473502972e-07 7.53889226907776e-07 3.22036453180506e-07 1.68931528429636e-07 1.04094510285934e-07 1.60098934336117e-07 1.02657996503878e-07 6.83661821001145e-08 1.61931255758191e-07 2.01320024686194e-07 1.07534006069169e-07 1.07910634894973e-07 9.46522813533042e-08 1.66743437525985e-07 1.78365196465516e-07 1.90349497426267e-07 1.99051143944893e-07 1.10969246755729e-07 1.11264782143939e-07 1.02006294022338e-07 1.24767050443006e-07 1.04932154146443e-07 1.03659587531759e-07 4.90478970104965e-08 9.01107885624077e-08 9.30802687007756e-08 2.06842405795697e-07 1.53448550376276e-07 9.79061221486547e-08 8.26140384317179e-08 1.50146254483116e-07 1.40136146748372e-07 1.56837338087257e-07 1.76198808159403e-07 1.99122966368083e-07 1.23858764266714e-07 1.06727895602262e-07 8.15204687804434e-08 1.88227798887152e-08 2.31668781894091e-08 7.67325491571661e-07 1.97158231154847e-07 1.04232262587474e-07 8.81089549804027e-09 1.09695696650620e-08 3.67828021042941e-07 2.42873900856430e-07 9.30400519863338e-08 1.22815336391232e-08 1.04498084973760e-07 4.13726864269242e-07 1.28584375991528e-08 1.20376581165868e-07 1.07046398186240e-07 5.96207309583810e-08 3.66763563633301e-08 1.21422552113772e-07 1.39822102904246e-07 1.58475758239753e-07 8.54716186106630e-08 9.47107273229749e-08 1.57282457487923e-07 2.22341833330773e-07 1.47297286955243e-07 2.19435143761748e-07 1.39688617089499e-07 7.24259126481027e-08 7.09641458863346e-08 1.19226547380480e-07 7.87372467318109e-08 9.72314598010880e-08 7.74647075656411e-09 9.47412998435404e-08 1.16751285273194e-07 1.13487779361823e-07 1.13827758524977e-07 2.72522446715463e-07 8.16170870703966e-08 8.72321297381038e-08 9.95784392252335e-08 2.65989252708394e-09 1.06630932742284e-07 9.36921419305549e-08 8.41656329617571e-08 1.30269792124746e-08 4.86904164038956e-06 1.01469686899418e-07 1.47172552045969e-07 1.11949067863535e-07 9.34802107168088e-08 6.41098286680338e-08 6.68095594366830e-09 4.65659962399765e-08 1.74321722504626e-07 1.53177157686198e-07 1.72679939394816e-07 9.26791009109865e-08 7.38280843033631e-09 1.21431764801520e-08 1.83474589517062e-08 5.49758746890643e-08 5.49686356365556e-08 5.41396143667257e-07 1.02078716839878e-08 1.46280082306786e-07 9.20039209747377e-08 1.07464173701763e-08 4.37249887631680e-08 1.20696543908951e-07 7.37023067237918e-08 1.54370995646110e-07 8.75880053587604e-08 1.38972473988507e-07 1.50011697718075e-07 1.13900910702895e-07 7.30960487245964e-08 1.06352204500379e-07 7.15892552073097e-09 1.26382007766409e-08 2.34492999966371e-07 9.25652500580458e-08 8.91104525001921e-08 1.04346566674604e-08 7.96833204055166e-08 3.41626685510968e-07 1.46859973263572e-07 6.99097620123092e-08 5.60565018753087e-08 9.18716519344181e-08 5.82078430390537e-09 8.51757309259611e-08 1.41028716092150e-07 7.10210717526897e-09 3.02205722277794e-08 2.76205242367368e-07 9.08403872147274e-08 8.55641175181640e-08 8.07674139440669e-08 5.64950026938399e-09 1.47871928050032e-07 1.37623718221666e-07 9.60980796219824e-08 9.05395061229061e-09 3.58713661087815e-07 3.78246981154481e-07 1.97627162656081e-08 4.78463482905684e-08 5.47976120635378e-07 5.98012738422856e-07 1.38288635243591e-07 3.97209746106909e-08 1.04405402152745e-07 1.64230983323839e-08 2.14721179480984e-08 4.85083210883807e-08 1.22646011220379e-06 8.39456826640735e-09 8.27662116573820e-08 3.58891263221149e-07 9.16048888640066e-08 1.21278839928491e-07 2.31054125718236e-07 1.00889365297461e-07 1.19358834432565e-07 2.43427211256917e-07 9.11020950715102e-08 1.38162844699562e-07 8.00915682468241e-08 4.98258405386454e-09 7.30080219716715e-08 1.52701681888474e-07 2.93328698184570e-07 1.35353313498113e-07 4.59682925254202e-08 9.08782411223864e-08 2.20927979357592e-08 9.05503229704100e-08 6.68343694641667e-08 7.33025736057753e-08 7.49958147508063e-08 6.22824091009223e-09 8.02682015058001e-06 3.67877032868707e-07 7.19496678750717e-08 3.17758490462365e-09 5.75563157661276e-09 3.24272951280416e-09 1.00381201383279e-07 1.88260239049035e-07 7.07194739983604e-08 4.68947848174950e-09 4.16252458503278e-09 7.94576959843098e-08 2.74009776209153e-07 1.42430916804990e-07 1.26235913248699e-07 1.39626029880374e-07 1.16782761195100e-07 1.00256563902946e-07 -2.95101260456139e-09 6.83432403678117e-08 1.27348806727558e-07 5.96766339731236e-08 1.03604721020808e-07 1.21085249476580e-07 6.80561072346092e-08 2.39948064835149e-09 1.00688731186191e-08 2.43035685127838e-08 4.13254891501583e-08 9.63544005596039e-09 2.53883818143423e-07 7.44890597640385e-07];
w0=0.002;
F=2*(pi^2)*(k^2).*z_diff.*Phi;
x0 = linspace(-0.02,0.02,Nx);y0=x0;[X0,Y0] = meshgrid(x0,y0);
Uin=exp(-(X0.^2+Y0.^2)/w0^2);
x = x + z_diff(1)*tan(beta);
screen1 = exp(1i*((Kx.*x) + (Ky.*y))).*delfx.*delfy.*sqrt(F(1)).*R ;
Uout = Uin.*exp(1i.*screen1);
c=[0.740664357812470 0.715162315217582 0.689780546528124 0.664556687838984 0.639501229779350 0.614618312979130 0.589909677254809 0.565375929219662 0.541017064806704 0.516832720551119 0.492822307973243 0.468985091286926 0.445320235117717 0.421826835235231 0.398503939126698 0.375350560217132 0.352365687964806 0.329548295192595 0.306897343515746 0.284411787427262 0.262090577416753 0.239932662380474 0.217936991503006 0.196102515739251 0.174428188990141 0.152912969040777 0.131555818312352 0.110355704466664 0.0893116008928944 0.0684224870996102 0.0476873490298864 0.0271051793136574 0.00667497746850089 0.0136042499421828 0.0337334891863653 0.0537137192700918 0.0735459118688980 0.0932310312800026 0.112770034392025 0.132163870669524 0.151413482150099 0.170519803452171 0.189483761791847 0.208306277007520 0.226988261591059 0.245530620724636 0.263934252322323 0.282200047075789 0.300328888503445 0.318321653002534 0.336179209903699 0.353902421527639 0.371492143243500 0.388949223528713 0.406274504030009 0.423468819625392 0.440532998486862 0.457467862143721 0.474274225546305 0.490952897130006 0.507504678879476 0.523930366392895 0.540230748946220 0.556406609557339 0.572458725050048 0.588387866117797 0.604194797387153 0.619880277480917 0.635445059080876 0.650889888990134 0.666215508194993 0.681422651926368 0.696512049720699 0.711484425480339 0.726340497533411 0.741080978693105 0.755706576316408 0.770217992362264 0.784615923449129 0.798901060911951 0.813074090858528 0.827135694225279 0.841086546832386 0.854927319438336 0.868658677793846 0.882281282695167 0.895795790036781 0.909202850863477 0.922503111421817 0.935697213210995 0.948785793033077 0.961769483042646 0.974648910795838 0.987424699298783 1.00009746705545 1.01266782811491 1.02513639211797 1.03750376434332 1.04977054575300 1.06193733303735 1.07400471865938 1.08597329089862 1.09784363389434 1.10961632768826 1.12129194826677 1.13287106760249 1.14435425369543 1.15574207061353 1.16703507853271 1.17823383377643 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Ri=z_diff./cos(beta);
screens = zeros(Nx,Nx,length(F)-1);
for i = 2:length(F)
x = x + z_diff(i)*tan(beta);
screens(:,:,i)= screens(:, :, i-1) + exp(1i*((Kx.*x)+(Ky.*y))).*delfx.*delfy.*sqrt(F(i)).*R;
Hi = exp(1i*Kz*Ri(i) - c(i).*Ri(i));
Ui = fftshift(fft2(Uout));
Ui = Hi.*Ui;
Ui = ifft2(ifftshift(Ui));
Uio = Ui.*exp(1i.*screens(:,:,i));
I = Uio.*conj(Uio);
Uout = Uio;
end
% to calculate SigmaI
A1=0;A2=0;
for i1=1:Nx
for i2=1:Nx
I1 = I(i1,i2)^2 ;
A1 = A1 + I1 ;
end
end
A1
A1 = 3.2006e-257
for j1=1:Nx
for j2=1:Nx
I2 = I(j1,j2) ;
A2 = A2 + I2;
end
end
SI = abs(((A1/Nx)/((A2/Nx)^2)) - 1)
SI = 0.7497
%to calculate BER
syms u
PI = (1/(u*sqrt(2*pi*SI)))*exp(-((log(u) + SI )^2)/(2*SI)) ;
SNR0 = 1;
SNR = SNR0/sqrt(1+SI*SNR0) ;
fun = PI*erfc(real((SNR.*u)/(2*sqrt(2))));
ff = matlabFunction(fun,'Vars',u);
BER = (0.5*integral(ff,0,Inf))
BER = 0.4032
I need to whether the codes for SigmaI and BER is correct.

回答 (1 件)

William Rose
William Rose 2024 年 5 月 20 日 18:13
I haven;t looked at the code, but I think the first equation is incorrect. You write
which appears to be missing a factor of 1/M in the fraction.

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