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in psk,we use only single type of phase shift for a bit transition.
in qpsk,we use 4 types of phase shifts for a bit transition.
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∙ 12y ago
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What is the advantage of qpsk over psk?
QPSK require less bandwidth compare to psk
What is the difference between QPSK?
See the question "What is QPSK". If you want the difference between QPSK and some other modulation system, you'll need to name the other one.
What is the difference between oqpsk and qpsk?
the phase shift allowed in OQPSK is 900 whereas in QPSK it is 1800 . QPSK is used in uplink whereas OQPSK is used in downlink.
Difference between absolute PSK and differential PSK?
In abs. PSK only instant phase for the incoming bits are considered. For DPSK, the difference between previous phase and the present phase is considered. Example: If BPSK is used, then for 0 if phase if pi and for 1 it is 0, then for abs. BPSK the phase states for the bit stream 1010 will be 0,pi,0,pi for DPSK, we assume initial phase is zero and a rule that , if incoming bit is zero, then phase difference is 0 and if it is 1 then, phase difference is pi. So, phase difference will be--pi,0,pi,0 Instant phase will be, pi,pi,0,0....Easy!!
What are the disadvantage of qpsk?
Disadvantages of QPSK are large interchannel interferences, required filtering, consonant synchronization, and more bandwidth usage for transmitting power. Its disadvantages are just matters of consumption and constant fine-tuning.
What is the advantage of qpsk over psk?
QPSK require less bandwidth compare to psk
What is QPSK?
QPSK = Quadrature Phase Shift Keying In QPSK amplitude are not much.so the carrier is constant. transmission rate is higher when compared with PSK
What is the difference between QPSK?
See the question "What is QPSK". If you want the difference between QPSK and some other modulation system, you'll need to name the other one.
Why Qpsk?
QPSK is used in CDMA because it helps achieve higher data rates. It is much better than simple PSK.
What is the difference between oqpsk and qpsk?
the phase shift allowed in OQPSK is 900 whereas in QPSK it is 1800 . QPSK is used in uplink whereas OQPSK is used in downlink.
What is the difference between QPSK and DPSK?
Qpsk has lesser bw than dpsk but has more probability in error than dpsk.
Which type of modulation is used in TV transmission?
In television system for video transmission AM is used and for audio transmission FM is used....
What are the difference between QAM and QPSK?
in qpsk we are using phases for representation of messages while in qam we hav amplitude levels. in qpsk 2 bits per symbol is used with four different phases. in qam depanding on type i.e 16 qam,64 qam,256 qam how many amplitude levels to be used accordingly i.e 16,64,256. sonender kumar
Difference between absolute PSK and differential PSK?
In abs. PSK only instant phase for the incoming bits are considered. For DPSK, the difference between previous phase and the present phase is considered. Example: If BPSK is used, then for 0 if phase if pi and for 1 it is 0, then for abs. BPSK the phase states for the bit stream 1010 will be 0,pi,0,pi for DPSK, we assume initial phase is zero and a rule that , if incoming bit is zero, then phase difference is 0 and if it is 1 then, phase difference is pi. So, phase difference will be--pi,0,pi,0 Instant phase will be, pi,pi,0,0....Easy!!
Compear fsk and psk?
fsk and psk
What is the bit rate of a QPSK compared to BPSK?
bit error is same for QPSK and BPSK. :
What does WPA-PSK stands for?
WPA-PSK is a type of encryption which must be used if you have choose between WEP and WPA-PSK. If you have an option to use WPA-PSK2 to use it because it's even better. PS: The problem with WEP is that it takes about 5 minutes to hack it. For WPA-PSK with password of at least 8 symbols it might take years if the password is complicated enough.
