Envelope behavior dIfference between QPSK, OQPSK and $\pi/4$-QPSK
May 20, 2017 · I am trying to analyze whats the major difference between these three variants of 4PSK. I know that QPSK - signal points are at 0,90,180,270 OQPSK - The bit period of Quadrature …
digital communications - Do BPSK vs QPSK have the same …
Dec 8, 2021 · I agree the higher order modulations above QPSK require better phase noise for same performance but don’t think that is the case with BPSK vs QPSK for the same arguments made with …
phase - Spectral properties of QPSK modulation - Signal Processing ...
Feb 8, 2021 · From what I've read, the spectral properties of the modulation largely depend on the rate of change of the signal phase - "a signal in which the phase changes stepwise has a broad …
qpsk - Use of pulse shaping in digital modulation - Signal Processing ...
Sep 18, 2020 · QPSK in its raw form would appear just as the OP has shown, where the information is encoded into four symbols given by the four phase states alone. The problem is this has a very wide …
what is the difference between QPSK and 4QAM? [duplicate]
Dec 27, 2016 · There are different types of QPSK: Offset (staggerd) QPSK, $\pi/4$-QPSK, etc. In its most known form, QPSK is identical to $4$-QAM or $4$-PSK. That is, the same constellation can be …
QPSK and OQPSK Modulation - Signal Processing Stack Exchange
Jan 24, 2014 · In QPSK, after splitting the odd and even bits into the I and Q channels, and then multiplying them with the sine and cosine function, what next am I suppose to do? Do I rearrange …
noise - What is the theoretical bit error rate for QPSK Matlab ...
I'm simulating a QPSK system in Matlab and I'm trying to calculate the theoretical bit error rate to compare it with the simulated ber. The formula that I'm aware of involves the term Eb/N0, but how do …
modulation - Why does NB-IoT use standard QPSK in multi-tone ...
Sep 15, 2023 · Are there specific technical or practical considerations (energy efficiency, throughput or coverage for example) that make QPSK a more suitable choice than π/4-QPSK, particularly in good …
the relationship between bandwidth and the datarate
Jan 8, 2016 · For QPSK, rate can be doubled using the same bandwidth. Therefore the supported rate is 2400bps. Why the BPSK signal of bandwidth 2/τ can support a datarate of B/2? and what is the …
power spectral density - QPSK Data Rate vs Bandwidth at Passband: …
9) With an IQ rate of 1 Mega samples per second, I can send 2 bits on each sample (because it is QPSK). 10) So the effective data rate is 2 Mbps for a bandwidth of 1 MHz at passband (in my …