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 …

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 …

Dec 27, 2016 · There are different types of QPSK: Offset (staggerd) QPSK, π/4 π / 4 -QPSK, etc. In its most known form, QPSK is identical to 4 4 -QAM or 4 4 -PSK. That is, the same …

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 them back …

Jul 9, 2023 · The power spectral densities shown below for a simulated QPSK waveform at 10 Gbit/s (with Raised Cosine roll-off factor of 0.3) demonstrate the relationships between the …

In a QPSK constellation, are the mapping points at 45, 135, 225 and 315 degrees while the 4QAM is at 0, 90, 180 and 270? I also struggle to understand the I/Q components of such a …

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 …

For QPSK, 4 points which are equiprobable are spaced at distance of $\sqrt {2E_b}$ from origin each, that is they are placed on vertices of a square of side $2\sqrt {E_b}$.

I conducted a research on how to implement a QPSK demodulator. I found out the Quadrature QPSK demodulation technique which seems very straight forward. Here is what i understood …

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 …