adimulyadi
Newbie level 2
need help to master here..
(if u have journal, please i need)
sorry if my language not perfect.. (indonesia)
i get stuck to my last project..
i asked to design GMSK modulator.
GMSK = Gaussian filter + MSK modulation.. but in this case, i should use OQPSK to change the MSK..
the GMSK modulator general specification:
IF = 70 MHz
bit rate = 270 kbps
the problem: what more spesification shoul i add ?? and, how much frequncy carrier should i use ??
how to design that modulator ?? anybody get advice ?? or maybe have block diagram ?? i get confuse with block diagram that i searched in google..
then, what component / IC should i use for do that modulator project ?? can i use IC MAX 2450 ?? the MAX 2450 said : Modulator Input Bandwidth Up to 15MHz.. what bandwidt here mean ??
what i know (on my mind):
the input is signal NRZ, then the signal splited to I (in phase) and Q (quadratur).. then modulation..
thanks before,,
regards
my email: adimulyadi9990@gmail.com
(if u have journal, please i need)
sorry if my language not perfect.. (indonesia)
i get stuck to my last project..
i asked to design GMSK modulator.
GMSK = Gaussian filter + MSK modulation.. but in this case, i should use OQPSK to change the MSK..
the GMSK modulator general specification:
IF = 70 MHz
bit rate = 270 kbps
the problem: what more spesification shoul i add ?? and, how much frequncy carrier should i use ??
how to design that modulator ?? anybody get advice ?? or maybe have block diagram ?? i get confuse with block diagram that i searched in google..
then, what component / IC should i use for do that modulator project ?? can i use IC MAX 2450 ?? the MAX 2450 said : Modulator Input Bandwidth Up to 15MHz.. what bandwidt here mean ??
what i know (on my mind):
the input is signal NRZ, then the signal splited to I (in phase) and Q (quadratur).. then modulation..
thanks before,,
regards
my email: adimulyadi9990@gmail.com
Last edited:
