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What is the modulation technique used in microwave pdh as nec equipment?
QAM... (16 QAM, 256 QAM) according to capacity
Which is the best modulation technique in terms of message carrying efficiency?
qpsk
What is meant by non constant envelope modulation?
A constant-envelope modualtion is a modualtion scheme in which the amplitude of the modualted tone remains constant with time. Main advantage of such modualtion schmes is that they relax the linearity requirements of the power amplifier (PA) and hence a less linear and more efficient PA can be used. Most modualtion schemes are not constant-envelope. For example, BPSK, QPSK, 16-QAM are not constant-envelope. Few modualtion schemes such as GFSK are constant-envelope.
How does quadrature amplitude modulation works?
QAM is a combination of phase modulation & amplitude modulation.
What is the typical bandwidth of a satellite transponder?
38 MHz. digital bit-rates vary depending on compression, modulation, typically QPSK. Expect at least 30 Mbps.
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
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 bit rate of a QPSK compared to BPSK?
bit error is same for QPSK and BPSK. :
What is the advantage of qpsk over psk?
QPSK require less bandwidth compare to 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?
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 modulation technique used in microwave pdh as nec equipment?
QAM... (16 QAM, 256 QAM) according to capacity
What is the difference between QPSK and DPSK?
Qpsk has lesser bw than dpsk but has more probability in error than dpsk.
Why Qpsk?
QPSK is used in CDMA because it helps achieve higher data rates. It is much better than simple PSK.
How many frequencies does a full-duplex QAM-128 modem use?
You are asking this question because you are trying to cheat on your homework!
What is take in the am abbreviated?
qam
What does the medical abbreviation 2 cap QAM mean?
2 cap QAM means two capsules each morning
