The bit-error-rate (BER) performances of both receivers for uncoded and coded MIL-STD SOQPSK are simulated and compared to those of OQPSK and Feher-patented quadrature phase-shift keying (FQPSK).
QPSK or Quadrature Phase Shift Keying, involves the splitting of a data stream m k(t) = m 0,m 1,m 2,..., into an in-phase stream m I(t) = m 0,m 2,m 4,... and a quadrature stream m Q(t) = m 1,m 3,m 5,.... Both the streams have half the bit rate of the data stream m k(t), and modulate the cosine and sine functions of a carrier wave simultaneously. As
Quadrature Phase Shift Keying - an overview - ScienceDirect
Quadrature Phase Shift Keying (QPSK) is a modulation technique that allows the transmission of multiple bits simultaneously by representing possible states with different analog levels and phases.
Phase-shift keying: Bit error rate - Blogger
2012年2月16日 · With this interpretation, the even (or odd) $.25 are acclimated to attune the in-phase basic of the carrier, while the odd (or even) $.25 are acclimated to attune the quadrature-phase basic of the carrier.
This paper analyse the bit error rate, for different modulation schemes such as Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK. By Choosing a reliable...
MATLAB 7.6 for simulation and evaluation of Bit Error Rate (BER) and Signal-To-Noise Ratio (SNR) for W-CDMA system models. It is shows that the analysis of Quadrature phases shift key and 16-ary Quadrature Amplitude modulations which are being used in
Quadrature Phase Shift Keying - an overview - ScienceDirect
Noting that there are four equally-likely, equal-energy signals in QPSK, we can use (7.1c) and (7.8b) to determine the average bit error rate, as reflected below: Assuming a rectangular pulse is used, the power spectral density of the QPSK signal, as …
(PDF) Bit Error Rate Performance of OFDM/OQPSK and CPM with …
2018年1月1日 · In this paper, Bit Error Rate performance of Orthogonal Frequency Division Multiplexing/Offset Quadrature Phase Shift Keying (OFDM/OQPSK) and Continuous Phase Modulation (CPM) over...
Bit-Error-Rate Performance of Quadrature Modulation …
2017年4月25日 · The antenna uses reconfigurable frequency selective surfaces to directly phase modulate a radio frequency carrier wave with a quadrature phase-shift keying modulation. A hardware-in-the-loop demonstration of the transmitter in a single-input-single-output communications system has been developed.
Precise BER analysis of dual-channel reception of QPSK in …
2005年4月4日 · A precise bit error rate analysis is performed for bandwidth-efficient dual-channel quadrature phase shift keying in Nakagami fading with Nakagami-faded asynchronous interfering signals. In contrast to previous works, the analysis accounts for the dependencies between the quadrature carriers owing to nonRayleigh fading and cochannel interference.