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    Usoro random na sistemu nkwukọrịta

    Oge nzipu: Nov-11-2024

    Enwere ike iweta ma mgbaama na mkpọtụ na nzikọrịta ozi dị ka usoro enweghị usoro na-agbanwe ka oge na-aga.

    Usoro random nwere njiri mara nke mgbanwe random na ọrụ oge, nke enwere ike ịkọwa site na echiche abụọ dị iche iche mana njikọ chiri anya: (1) Usoro random bụ nhazi ọrụ nlele enweghị ngwụcha; (2) Usoro na-enweghị usoro bụ usoro mgbanwe mgbanwe.

    A na-akọwa njirimara ndekọ aha nke usoro enweghị usoro site na ọrụ nkesa ha ma ọ bụ ọrụ njupụta nke puru omume. Ọ bụrụ na njirimara ndekọ aha nke usoro enweghị usoro na-adabereghị na mmalite oge, a na-akpọ ya usoro kwụsiri ike.

    Njirimara ọnụọgụgụ bụ ụzọ ọzọ dị mma nke na-akọwa usoro enweghị usoro. Ọ bụrụ na pụtara usoro ahụ na-adịgide adịgide yana ọrụ autocorrelation R(t1,t1+τ)=R(T), a na-ekwu na usoro a ga-anọ n'ozuzu ya.
    Ọ bụrụ na usoro anaghị eguzosi ike, mgbe ahụ ọ ga-abụrịrị na ọ kwụ ọtọ, ma nke ọzọ abụghị eziokwu.

    Usoro bụ ergodic ma ọ bụrụ na nkezi oge ya hà nhata na nkezi ndekọ ọnụ ọgụgụ kwekọrọ.

    Ọ bụrụ na usoro bụ ergodic, mgbe ahụ ọ na-adịkwaghị, ma ọzọ abụghị eziokwu.

    The autocorrelation ọrụ R (T) nke a generalized guzobe usoro bụ ọbụna ọrụ nke oge dị iche r, na R (0) hà na ngụkọta nkezi ike na bụ kacha uru nke R (τ). Ike spectral density Pξ (f) bụ mgbanwe Fourier nke ọrụ autocorrelation R (ξ) (Wiener - Sinchin theorem). Otu ụzọ mgbanwe a na-ekpebi mmekọrịta ngbanwe n'etiti ngalaba oge na ngalaba ugboro. Nkesa nke puru omume nke usoro Gaussian na-erube isi na nkesa nkịtị, na nkọwa ndekọ ọnụ ọgụgụ ya zuru ezu chọrọ naanị njirimara ọnụọgụ ya. Nkesa puru omume nke otu akụkụ na-adabere naanị n'ọnụ na ọdịiche, ebe nkesa ihe gbasara omume abụọ na-adabere karịsịa na ọrụ mmekọrịta. Usoro Gaussian ka bụ usoro Gaussian mgbe mgbanwe gbanwere. Mmekọrịta dị n'etiti ọrụ nkesa nkịtị na ọrụ Q (x) ma ọ bụ erf (x) bara uru nke ukwuu n'ịtụle arụmọrụ mgbochi mkpọtụ nke usoro nkwurịta okwu dijitalụ. Mgbe usoro enweghị usoro ξi(t) gafeworo n'usoro ahịrị, usoro mmepụta ya ξ0(t) kwụkwara ike.

    The statistical e ji mara nke warara-band random usoro na sine-wave plus warara-band Gaussian mkpọtụ na-adaba adaba maka nyocha nke na-ada ada multipath ọwa na modulation usoro/bandpass usoro / ikuku nkwurịta okwu. Nkesa Rayleigh, nkesa osikapa na nkesa nkịtị bụ nkesa atọ a na-ahụkarị na nzikọrịta ozi: envelopu nke mgbaàmà sinusoidal carrier yana mkpọtụ Gaussian dị warara bụ nkesa osikapa. Mgbe njupụta mgbaama buru ibu, ọ na-eche na nkesa nkịtị. Mgbe njupụta ahụ dị ntakịrị, ọ bụ ihe dịka nkesa Rayleigh.

    Gaussian na-acha ọcha mkpọtụ bụ ezigbo ihe nlereanya iji nyochaa ụda ntinye nke ọwa, na isi ụda ụda na nkwurịta okwu, ụda ọkụ, bụ nke ụdị mkpọtụ a. Ụkpụrụ ya n'oge abụọ ọ bụla dị iche iche enweghị njikọ yana nweere onwe ya. Mgbe mkpọtụ na-acha ọcha gafere na sistemụ nwere oke band, nsonaazụ ya bụ mkpọtụ nwere oke. Mkpọtụ ọcha na-agafe agafe na mkpọtụ ọcha na-agafe agafe bụ ihe a na-ahụkarị na nyocha usoro.
    The n'elu bụ "random usoro nke nkwurịta okwu usoro" isiokwu wetara gị Shenzhen HDV Phoelectron Technology LTD., na HDV bụ ụlọ ọrụ pụrụ iche na ngwa anya nkwurịta okwu dị ka isi mmepụta ngwá, ụlọ ọrụ onwe mmepụta: ONU usoro, ngwa anya modul usoro,Usoro OLT, usoro transceiver na-ekpo ọkụ usoro ngwaahịa.

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