Jun 6, 2018 · The code of QPSK modulation and demodulation technique has been developed according to the theory. The theoretical description of QPSK modulation and demodulation are available in the book of "communication system " by SIMON HAYKIN.

It shows how to model several parts of the QPSK system such as modulation, frequency and phase recovery, timing recovery, and frame synchronization. It measures the system performance by calculating BER. It also shows that the generated C code runs several times faster than the original MATLAB code. Appendix

The comm.QPSKModulator object modulates a signal using the quadrature phase shift keying (QPSK) method. The output is a baseband representation of the modulated signal. To modulate using the QPSK method:

MATLAB Code for QPSK Modulation and Demodulation Quadrature Phase Shift Keying (QPSK) is a digital modulation scheme that conveys two bits per symbol by changing the phase of the carrier signal. Each pair of bits is mapped to one of four …

Jan 21, 2023 · The modulation process in QPSK involves mapping the input bits to one of the four possible phase states. The demodulation process involves determining the phase of the received signal and mapping it back to the original bits.

Quadrature Phase Shift Keying (QPSK) is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts (0, 90, 180, or 270 degrees). QPSK allows the signal to carry twice as much information …

This section provides MATLAB source code examples for BPSK, QPSK, 16QAM, and 64QAM modulation (or data mapping). This page details the modulation/mapping of binary data based on the modulation type: BPSK, QPSK, 16QAM, and 64QAM. It also plots the constellation diagram for each modulation scheme. Setting Up Parameters for Modulation (MATLAB Code)

This is Matlab implementation of communication through QPSK(Quadrature Phase Shift Keying) signals which include the modulation and demodulation of it, and make it more realistic we have added white Gaussian noise into it. If you have communcation pack installed in the matlab then use: modulation_demodulation_QPSK.m

This code implements QPSK and its improved OQPSK modulation. QPSK.m : It shows how I, Q signals multiply with high frequency carriers (cos(2pifct) and sin(2pifct)) After IQ mapping, binary sequences also need to go through the raised cosine roll off filter for pulse shaping. OQPSK.m : Q signal is 0.5 seconds later than I signal.

QPSK (Quardrature phase shift key) or sometimes called as 4-PSK is a digital modulation technique. Here 4 represents 4 phase (45,135,225,315), in which carrier is send (fig 1). QPSK has 4 possible states i.e. QPSK can encode 2 bit per symbol. It …