Generation and detection of QPSK is complex.
Phase shift keying Quadrature shift keying
QPSK = Quadrature Phase Shift Keying In QPSK amplitude are not much.so the carrier is constant. transmission rate is higher when compared with PSK
8 phase shift keying is a complex form of digital modulation by altering a sine wave and a cosine wave: shifting their phase. The best explanations I have found so far can be found at http://en.wikipedia.org/wiki/Phase-shift_keying and http://www.sss-mag.com/pdf/1modulation.pdf But they all explain the more simpler forms of phase shift keying: Binary Phase Shift Keying (BPSK) and Quadrature Phase Shift Keying (QPSK) and they don't say much about 8PSK unfortunately. However this might still give you an idea. Good luck, I will keep searching myself. Karen von Hünerbein
differential phase-shift keying (′dif·ə′ren·chəl ′fāz ′shift ′kē·iŋ) (communications) Form of phase-shift keying in which the reference phase for a given keying interval is the phase of the signal during the preceding keying interval. Also known as differentially coherent phase-shift keying.Above retrieved from Answers.comViper1
PSK (Phase Shift Keying) and QPSK (Quadrature Phase Shift Keying) are both digital modulation techniques used in communication systems. The main difference is that QPSK uses four distinct phase shifts, while PSK uses two. Therefore, QPSK can transmit twice as much data as PSK in the same amount of bandwidth.
One advantage is more bandwidth. A disadvantage is that the transmitted power is lower.
QPSK (Quadrature Phase Shift Keying) allows for double the data transmission rate compared to PSK (Phase Shift Keying) for the same bandwidth. Additionally, QPSK is more resilient to noise and interference compared to PSK, making it a preferred choice for communication systems in noisy environments.
The advantage of a binary phase-shift keying is that within a given bandwidth, modulation of higher orders allow to carry higher rates.
The advantage of a binary phase-shift keying is that within a given bandwidth, modulation of higher orders allow to carry higher rates.
Binary (Bipolar) Phase Shift Keying.
The acronym "BPSK" stands for burst pulse shift keying. Burst pulse shift keying is the simplest form of phase shift keying or PSK known currently to exist.
Although QPSK (quadrature phase shift keying) refers to an instance when two bits are processed at once, this does not mean that the actual bit rate is twice that of the baud rate.