phase quadrature amplitude modulation
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OFDM or Single-Carrier Block Transmissions?
White Paper It first compares their peak-to-average power ratio (PAR) and the corresponding power amplifier backoff for phase-shift keying or quadrature amplitude modulation. This paper compares two block transmission systems over frequency-selective fading... [10 Apr 2008]
Understanding Upstream Modulation Profiles
White Paper Many upstream modulation profile variables can be changed, such as guard time of the burst, preamble, modulation (quadrature phase shift keying [QPSK] or 16-quadrature amplitude modulation [QAM]), and forward error correction (FEC) protection. [27 Nov 2007]
Performance Degradation of OFDM Systems Due to Doppler Spreading
White Paper For conventional modulation methods such as Phase-Shift Keying (PSK) and Quadrature-Amplitude Modulation (QAM), the bivariate probability density function (pdf) of the ICI is shown to be a weighted Gaussian mixture. [11 Apr 2007]
Space-Time Block Coded and IQ-Interleaved TCM, TTCM, BICM and BICM-ID Assisted OFDM
White Paper Trellis Coded Modulation (TCM), TurboTCM(TTCM), Bit-Interleaved Coded Modulation (BICM) and Iteratively Decoded BICM (BICM-ID) schemes having a similar decoding complexity are employed in conjunction with 16-level Quadrature Amplitude Modulation... [26 Jul 2005]
Adaptive Modulation (QPSK, QAM)
White Paper Techniques described include quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM) and how these techniques can be used to increase the capacity and speed of a wireless network. [30 Nov 2004]
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