QPSK


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QPSK

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

QPSK

(Quadrature Phase Shift Keying) A phase modulation technique that transmits two bits in four modulation states. See PSK, phase modulation and QAM.
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References in periodicals archive ?
In addition to conformance testing, there are several main applications for which the composite EVM measurement (and its related displays and metrics) would be used instead of a QPSK EVM measurement.
In figure 1 the influence of fading parameter [eta] on the performance of the receiver with an imperfect reference carrier extraction can be traced for the case of QPSK detection.
Without loss of generality, we consider in this work differential QPSK and 16QAM differentially encoded in quadrant.
TABLE 1: Combinational polarities for QPSK symbols.
The BER values have been computed as a function of SNR for PSK modulation in terms of BPSK and QPSK modulation and different combinations of MIMO systems using MMSE, MMSE-SIC, Modified MMSE, ML and ZF, ZF-SIC, ZF-SIC-Sort equalizers.
Pirmojoje daugiamates tiesines regresijos lygtyje naudojami trys parametrai: CQI, QPSK ir 16-QAM.
With 16-QA Mmodulation the degradation in the bit error rate performance is bigger compared with the QPSK results.
and substituting [sigma] using the SNR formula in a QPSK modulation [15] the symbol error probability can be rewritten as:
Compact and powerful, the Vyper is fully compliant to the EN302307 standard, meaning it integrates constant coding, variable coding, and adaptive coding and modulation modes (ACM), as well as QPSK, 8PSK, 16 and 32APSK constellations, ensuring a useful bit-rate up to 45 Mbauds.