Mfiridwuma mu Nhwehwɛmu ne Radio Nkitahodi Akwan Abien-Kwan a Wɔde Di Dwuma

Radio a ɛwɔ akwan mmienu-(a wɔsan frɛ no walkie-talkie nkitahodi) yɛ point-to-point anaa point-to-multipoint instant wireless nkitahodi mfiridwuma a wɔde di dwuma kɛse wɔ ɔmanfo ahobammɔ, akwantu, mfiridwuma mu nneɛma a wɔyɛ, ne abɔnten dwumadi ahorow mu. Ne mfasoɔ titire ne sɛ ɛma bere ankasa -mene nne nkitahodi tumi yɛ adwuma a ɛnmfa ne ho nto cellular network infrastructure so. Nea ɛda nsow ne sɛ ɛyɛ mmerɛw, ɛko tia nneɛma a ɛtwetwe adwene denneennen, na ɛho ka sua.

Radio nkitahodi akwan abien-gyinaa fã-duplex anaa full-duplex modes so titiriw. Wɔ fã-duplex mode mu no, ɔdefo no mia "Push-to-Talk" bɔtn (PTT) no so de nsɛnkyerɛnne bi kɔ. Sɛ wogyae a, sɛnkyerɛnne no dan kɔ receive mode so, na ɛhwɛ hu sɛ ɔfã biako pɛ na obetumi de nsɛm akɔma wɔ ɔkwan koro no ara so bere koro mu. Full-duplex mode ma afã abien no nyinaa kwan ma wɔde nne nkrasɛm mena na wogye bere koro mu, te sɛ telefon a wokura kyin frɛ, nanso mpɛn pii no ɛhwehwɛ sɛ wonya spectrum resource a ɛtrɛw na wɔtaa hu wɔ adwumayɛfo dijitaal trunking nhyehyɛe mu.

Wɔ mfiridwuma mu no, radio akwan abien-de ne ho to VHF (Very High Frequency, 30-300 MHz) ne UHF (Ultra High Frequency, 300-3000 MHz) frequency band ahorow so. VHF ma wotumi hyɛn mu denneennen na ɛfata ma mmeae a ɛhɔ yɛ petee, bere a UHF ma diffraction resistance a ɛkorɔn na ɛfata ma nkurow akɛse mu mmeae a ɛhɔ yɛ den. Digitals nkitahodi mfiridwuma (te sɛ DMR ne P25) ama spectrum adwumayɛ atu mpɔn bio, aboa encrypted transmission ne data services, na ama nkitahodi ahobanbɔ ne dwumadie akɔ anim.

Wɔ dwumadie a ɛyɛ adwuma mu no, radio akwan mmienu-a wɔde bedi dwuma no hwehwɛ sɛ wɔsusu akwan nhyehyɛeɛ, tumi nhyehyɛeɛ, ne antenna a wɔpaw ho. Sɛ nhwɛsoɔ no, mfiri a ɛwɔ tumi kɛseɛ -fata ma nkitahodiɛ a ɛkɔ akyirikyiri, berɛ a mfiri a ahoɔden sua -fata kɛseɛ ma akyirikyiri-density tebea. Bio nso, repeaters betumi atrɛw coverage mu denam signals a wogye ne forwards so, na ɛma cross-regional nkitahodi tumi yɛ adwuma.

Sɛ yɛbɛbɔ no mua a, radio akwan abien-da so ara yɛ nea wontumi nsi ananmu wɔ ntɛmpɛ ho mmuaema ne kuw adwumayɛ mu esiane ahotoso ne nsakrae a ɛwɔ mu nti. Sɛ wɔde digyital mfiridwuma bɛka abom a, wɔbɛma wɔn nkitahodi pa ne wɔn dwumadie ayɛ yie bio de adi nnɛyi nkitahodiɛ ahiadeɛ ahodoɔ ho dwuma.