Ma waho aʻe o ka hopena i hoʻonui ʻia o ka hoʻouna ʻana i ka mana a me ka loaʻa ʻana o ka antenna i ka ikaika hōʻailona, nā ala ala, nā keʻakeʻa, ka hoʻopili ʻana a me ka walaʻau e hoʻonāwaliwali i ka ikaika hōʻailona, ʻo ia nā mea āpau.I ka hoʻolālā ʻana i kahipūnaewele kamaʻilio lōʻihi, pono mākou e hōʻemi i ka mae a me ka hoʻopili ʻana i ka hōʻailona, e hoʻomaikaʻi i ka ikaika o ka hōʻailona, a hoʻonui i ka mamao o ka hoʻouna ʻana i ka hōʻailona.
Nahenahe ka hōʻailona
E emi mālie ka ikaika o ka hōʻailona uila i ka wā o ka hoʻouna ʻana.No ka mea hiki i ka mea hoʻokipa ke loaʻa a ʻike i nā hōʻailona uʻi ʻole nona ka ikaika o ka hōʻailona ma luna o kekahi paepae, i ka wā e mae nui ai ka hōʻailona, ʻaʻole hiki i ka mea lawe ke ʻike.ʻEhā mau kumu nui e pili ana i ka mae ʻana o ka hōʻailona.
● Keakea
ʻO nā pilikia ka mea maʻamau a koʻikoʻi i nā pūnaewele kamaʻilio uea i loaʻa ka hopena nui i ka attenuation hōʻailona.No ka laʻana, hoʻemi nā pā like ʻole, aniani, a me nā puka i nā hōʻailona uea ʻole i nā degere like ʻole.ʻOi aku ka nui o nā keʻakeʻa metala e poloka loa a hōʻike i ka hoʻolaha ʻana o nā hōʻailona uila.No laila, i ka wā e hoʻohana ai i nā lekiō kamaʻilio uea, pono mākou e hoʻāʻo e pale i nā pilikia e loaʻa ai kahi kamaʻilio lōʻihi.
● Ka mamao hoʻouna
Ke hoʻolaha ʻia nā hawewe electromagnetic i ka lewa, i ka piʻi ʻana o ka mamao o ka hoʻouna ʻana, e mae mālie ka ikaika hōʻailona a nalowale.ʻO ka attenuation ma ke ala hoʻouna ʻo ia ka poho o ke ala.ʻAʻole hiki i nā kānaka ke hoʻololi i ka waiwai attenuation o ka lewa, ʻaʻole hiki iā lākou ke pale aku i nā hōʻailona uila uila, akā hiki iā lākou ke hoʻolōʻihi i ka mamao o ka lawe ʻana o nā hawewe electromagnetic ma o ka hoʻonui ʻana i ka mana hoʻouna a me ka hōʻemi ʻana i nā pilikia.Hiki i nā hawewe electromagnetic ke hele, ʻo ka ʻāpana ākea e hiki ke uhi ʻia ka ʻōnaehana uila uila.
● Ka pinepine
No nā hawewe electromagnetic, ʻoi aku ka pōkole o ka nalu, ʻoi aku ka paʻakikī o ka mae.Inā he 2.4GHz, 5GHz a i ʻole 6GHz ka alapine hana, no ka mea, he kiʻekiʻe loa ko lākou alapine a he pōkole loa ka nalu, ʻoi aku ka ʻike o ka nalo ʻana, no laila ʻaʻole mamao loa ka mamao kamaʻilio.
Ma kahi o nā mea i luna, e like me ka antenna, ka hoʻouna ʻana i ka data, modulation scheme, etc.I mea e hoʻokō ai i kahi mamao kamaʻilio lōʻihi, ka hapa nui oIWAVE mea hoʻouna ʻikepili uilahoʻohana i ka 800Mhz a me 1.4Ghz no ka wikiō hd, ka leo, ka ʻikepili mana a me ka lawe ʻana i ka ʻikepili TCPIP/UDP.Hoʻohana nui ʻia lākou no nā drones, nā hoʻonā UAV, UGV, nā kaʻa kamaʻilio kauoha a me ka transceiver radio paʻa lima lima ma ka paʻakikī a ma waho o ka laina o ka ʻike.
● Hoʻopilikia
Ma waho aʻe o ka attenuation hōʻailona e pili ana i ka ʻike ʻana o ka mea hoʻokipa i nā hōʻailona ueaʻole, hiki ke loaʻa ka hopena a me ka walaʻau.Hoʻohana pinepine ʻia ka ratio signal-to-noise a i ʻole signal-to-interference-to-noise ratio e ana i ka hopena o ke keakea a me ka walaʻau i nā hōʻailona uila.ʻO ka ratio signal-to-noise a me ka ratio-to-interference-to-noise ratio nā hōʻailona ʻenehana nui no ke ana ʻana i ka hilinaʻi o ka maikaʻi kamaʻilio o nā ʻōnaehana kamaʻilio.ʻO ka nui o ka ratio, ʻoi aku ka maikaʻi.
ʻO ka hoʻopili ʻana e pili ana i ka hoʻopili ʻia e ka ʻōnaehana ponoʻī a me nā ʻōnaehana like ʻole, e like me ka hoʻopili ʻana i ke ala hoʻokahi a me ka hoʻopili multipath.
ʻO ka walaʻau e pili ana i nā hōʻailona hou ʻole i loaʻa ʻole i ka hōʻailona kumu i hana ʻia ma hope o ka hele ʻana i nā mea hana.Pili kēia hōʻailona i ke kaiapuni a ʻaʻole e loli me ka hoʻololi o ka hōʻailona kumu.
Hōʻailona hōʻailona SNR (Signal-to-noise Ratio) pili i ka ratio o ka hōʻailona i ka walaʻau i loko o ka ʻōnaehana.
ʻO ka ʻōlelo o ka ratio hōʻailona-a-noise ʻo ia:
SNR = 10lg (PS/PN), kahi:
SNR: ka lakio hōʻailona-a-noise, ʻo ka ʻāpana he dB.
PS: ʻO ka mana kūpono o ka hōʻailona.
PN: Mana maikaʻi o ka walaʻau.
ʻO SINR (Signal to Interference plus Noise Ratio) e pili ana i ka lakio o ka hōʻailona i ka huina o ke keakea a me ka walaʻau i ka ʻōnaehana.
ʻO ka hōʻike o ka ratio hōʻailona-i-interference-to-noise:
SINR = 10lg[PS/(PI + PN)], kahi:
SINR: Lakiō hōʻailona-i-interference-to-noise, ʻo ka ʻāpana he dB.
PS: ʻO ka mana kūpono o ka hōʻailona.
PI: Ka mana kūpono o ka hōʻailona keakea.
PN: Mana maikaʻi o ka walaʻau.
I ka hoʻolālā ʻana a me ka hoʻolālā ʻana i kahi pūnaewele, inā ʻaʻohe koi kūikawā no SNR a i ʻole SINR, hiki ke nānā ʻole ʻia lākou.Inā makemake ʻia, i ka wā e alakaʻi ai i ka hoʻohālikelike hōʻailona ikaika o ke kahua ma ka hoʻolālā hoʻolālā pūnaewele, e hana ʻia ka hōʻailona hōʻailona hoʻohālikelike-a-noise ratio i ka manawa like.
Ka manawa hoʻouna: Feb-20-2024
