Amplitude vachisiyanisa inzwi uye kuvandudzika kwayo

The eDare redhiyo chero ano ane AM-FM chinja. Kazhinji, vanhuwo vatengi usafunga nezvokuti zvinoreva tsamba idzi, zviri zvakakwana kuyeuka kuti FM chaanodisisa FM yeredhiyo iyo dzeredhiyo vari redhiyo uye nomucheka quality, uye NDIRI unogona kubata "Lighthouse". Kana isu kuenda hwokugadzira mashoko kwenguva aishandisa Chinyorwa pamwero, uchawana kuti AM - iri amplitude vachisiyanisa inzwi uye FM - maitikiro. Sei zvakasiyana?

To wakaridza kubva mutauri redhiyo mumhanzi ruzha chiratidzo aifanira kuchinja zvimwe zvinhu. Pakutanga zvinofanira kuitwa yakakodzera Nhepfenyuro yeredhiyo. Amplitude vachisiyanisa inzwi ndiyo nzira rokutanga, signalers, mainjiniya vakadzidza wokushandura inzwi uye mumhanzi zvirongwa mumhepo. American Reno muna 1906, achibatsirwa zvokuimba oscillation jenareta yaiva 50 kHz, akava wokutanga munhoroondo mutakuri maitikiro. Next akasarudza hwokugadzira dambudziko iri nyore nzira, nokuzvisarudzira maikorofoni goho coils. Kana vachibatwa kuridza mafungu ari kabhoni upfu mukati dzinodzvova yakachinja kurwisa kwayo, uye kwakakura chiratidzo ichibva jenareta kusvika achitumira kanyanga zvinoderedza kana kuwedzera zvichienderana pavo. Sezvo amplitude vachisiyanisa inzwi kwave yagadzirwa i.e. shanduko amplitude uyo akaendesa chiratidzo kuti fomu hamvuropu mutsetse anoenderana pezvakaita zvitange chiratidzo. Munguva maviri, zvemaziso emagetsi vakanga kwaidarika ne Erekitironi-rambi. Izvi akaderedza zvikuru kukura uye uremu zvinotakura.

Frequency vachisiyanisa inzwi akasiyana amplitude kuitira kuti kutsanangurwa mutakuri chinozunguzirwa anoramba achitsungirira, kuchinja maitikiro kwayo. Sezvo nechigadziko uye electronic hushande pane dzimwe nzira iyo mashoko chiratidzo iri "gara" paredhiyo maitikiro. Danho shanduko uye tichimhanya Latitude akapiwa zita Pasika uye kupomba upamhi vachisiyanisa inzwi. Zvaiita kuti amplitude vachisiyanisa inzwi redhiyo nhepfenyuro senzira kubva musi. Asi zvinhu zvakaitika zvakasiyana, yava kuramba nzvimbo yayo, kunyange ari zvishoma dzakachinjwa chimiro.

Kuwedzera Kudiwa ruzivo saturation maitikiro kukurudzira mainjiniya kutsvaka nzira kuwedzera uwandu Mipata chinopfuudzwa pamusoro chete wavelength. Zvinoumba multi-mugero nhepfenyuro kutsunga theorem no Kotel'nikova uye Nyquist mhinganidzo Zvisinei, kuwedzera chiratidzo quantization, zvinokwanisika kuti kuwedzera umboo mutoro pamusoro kukurukurirana mugero nokuchinja Pasika. Quadrature amplitude vachisiyanisa inzwi - nzira nokuda kutapukirwa kwakadaro, umo chete kakawanda iri zvitange anonongedzera siyana, danho haachatauri hama mumwe nokuda madhigirii 90. Forms mana danho kana mubatanidzwa maviri quadrature zvinoriumba akatsanangura trigonometric mabasa chivi uye Kosi, saka zita.

Quadrature amplitude vachisiyanisa inzwi iri zvinowanzoshandiswa digitaalinen yokukurukurirana. By pezvawakaita ndiwo mubatanidzwa danho uye amplitude vachisiyanisa inzwi.