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 …
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 …
I and Q components and the difference between QPSK and 4QAM
Jan 8, 2013 · 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 …
Implementing QPSK Demodulation - Signal Processing Stack Exchange
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 from the …
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 …
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 …
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 …
digital communications - Why is bit error rate = symbol error rate ...
I think that $2$ is because the QPSK symbol consists of two bits. But why can the bit error rate be equal to the symbol error rate divided by the number of bits per symbol?
Offset QPSK Demodulation using GnuRadio - Signal Processing Stack …
Dec 28, 2020 · I am currently trying to demodulate an Offset QPSK signal coming from a satellite using GNURadio. If I understood correctly, an OQPSK is a QPSK with one of the two bits per symbol …