Zvose zviratidzo uye ruzha mukutaurirana zvinogona kutorwa semaitirwo asina kujairika anochinja nekufamba kwenguva.
Random process ine maitiro ekuchinja kusingaverengeki uye nguva yekushanda, iyo inogona kutsanangurwa kubva kune maviri akasiyana asi ane hukama maonero: (1) Random process ndiyo seti yekusingaperi sampuli mabasa; (2) A random process is a set of random variables.
Zvimiro zvezvimiro zvezvirongeka zvinotsanangurwa nebasa ravo rekugovera kana mukana wekuti density function. Kana zvimiro zvechiverengero chemaitiro asina kurongeka zvakazvimirira pane nguva yekutanga, inodaidzwa kuti yakamira yakamira.
Zvimiro zvenhamba ndiyo imwe nzira yakatsvinda yekutsanangura maitiro asina kujairika. Kana chirevo chemaitiro chichigara uye autocorrelation basa R(t1,t1+τ)=R(T), maitiro anonzi akajairwa akamira.
Kana maitiro akanyatsomira, saka anofanira kunge akamira zvakanyanya, uye zvinopesana hachisi chokwadi.
Nzira ndeye ergodic kana nguva yaro yakaenzana neavhareji yenhamba inoenderana.
Kana chirongwa chiri ergodic, saka zvakare chakamira, uye zvinopesana hachisi chokwadi chaicho.
The autocorrelation function R(T) ye generalized stationary process is an even function of the time musiyano r , uye R(0) inoenzana neavhareji yese simba uye ndiyo yakakosha kukosha kweR(τ). Power spectral density Pξ(f) ndiyo Fourier shanduko ye autocorrelation function R(ξ) (Wiener - Sinchin theorem). Iyi mbiri yeshanduko inosarudza hukama hwekushandura pakati penguva domain uye frequency domain. Mukana wekugoverwa kweGaussian process inoteerera kugovera kwakajairika, uye tsananguro yenhamba yakazara inoda chete hunhu hwayo hwenhamba. Kugovera kwechikamu chimwe chete kunotsamira pazvinorehwa uye musiyano, ukuwo mativi maviri-maviri angangogovera anoenderana zvikuru nebasa rekubatanidza. Iyo Gaussian process ichiri nzira yeGaussian mushure mekushandurwa kwemutsara. Hukama huri pakati pezvakajairwa kugovera basa uye Q(x) kana erf(x) basa rinobatsira zvakanyanya mukuongorora maitirwo eanopokana neruzha emadhijitari ekutaurirana masisitimu. Mushure mekuita kwakamira zvisina tsarukano ξi(t) ichipfuura nepakati pemutsara system, maitiro ayo ekuburitsa ξ0(t) zvakare yakagadzikana.
Hunhu hwehuwandu hweakatetepa-bhendi zvisina tsarukano maitiro uye sine-wave plus nhete-bhendi yeGaussian ruzha rwakanyanya kukodzera kuongororwa kweiyo inopera yakawandisa nzira mumodulation system/bandpass system/wireless kutaurirana. Rayleigh kugovera, Kugovera Mupunga uye kugovaniswa kwakajairwa kugoverwa kutatu kwakajairwa mukutaurirana: hamvuropu ye sinusoidal mutakuri siginecha pamwe nhete-bhendi reGaussian ruzha kazhinji kugovera Mupunga. Kana iyo chiratidzo amplitude yakakura, inoenda kune yakajairika kugovera. Kana iyo amplitude idiki, ingangoita Rayleigh kugovera.
Gaussian chena ruzha imhando yakanaka yekuongorora iyo yekuwedzera ruzha rwechiteshi, uye iyo huru ruzha sosi mukutaurirana, ruzha rwekupisa, nderwerudzi urwu rweruzha. Hunhu hwayo panguva ipi neipi mbiri dzakasiyana hadzina kubatanidzwa uye dzinozvimiririra pahuwandu. Mushure meruzha ruchena ruchipfuura nebhandi-limited system, mhedzisiro ibhendi-shoma ruzha. Low-pass white noise uye bhendi-pass chena ruzha zvakajairika muongororo yekuongorora.
Zviri pamusoro apa inyaya ye "random process of communication system" yakaunzwa kwauri neShenzhen HDV Phoelectron Technology LTD., uye HDV ikambani inyanzvi mukukurukurirana kwemaziso semidziyo huru yekugadzira, kugadzirwa kwekambani: ONU series, optical module series,OLT series, transceiver series dzinopisa dzakatevedzana dzezvigadzirwa.
