Plag: MSK yog qhov ua tau zoo dua li lwm cov kev hloov pauv.
Puas yog qhov kev hloov pauv tau zoo?
feem ntau siv los txuag lub zog ntawm xpense ntawm bandwidth, thaum nyob rau hauv kev txwv band-txoj kev "spectrally npaum modulation" cov tswv yim yuav raug siv los txuag bandwidth. Lub hom phiaj tseem ceeb ntawm spectrally npaum modulation yog txhawm rau ua kom lub zog ua haujlwm tau zoo tshaj plaws, ntsuas hauv cov khoom / s / Hz.
Kev hloov pauv dab tsi yog qhov ua tau zoo tshaj?
Rau cov kev sib txuas kho qhov muag, hom BPSK feem ntau ntseeg tias yog lub zog siv hluav taws xob ntau tshaj plaws, piv txwv li, cov qauv hloov kho uas xav tau qis tshaj qhov teeb liab-rau- suab nrov piv (SNR) ib me ntsis kom ncav cuag tus nqi me ntsis yuam kev (BER).
Yuav ua li cas cov hauv qab no ua haujlwm zoo dua bandwidth?
4. Qhov twg yog bandwidth npaum li cas? Nqe lus piav qhia: Lub Sijhawm hopping kis spectrum yog ntau bandwidth npaum.
Tus txheej txheem kev hloov pauv twg yuav tsum muaj bandwidth tsawg dua?
Linear modulation cov tswv yim, suav nrog txhua hom kev hloov pauv quadrature-amplitude (QAM) thiab theem-hloov-keying (PSK), siv bandwidth tsawg dua li cov txheej txheem nonlinear, suav nrog ntau hom ntawm zaus / yam tsawg kawg-hloov-keying (FSK thiab MSK).
