QAM to circular isomorphic constellations [PDF]
2016 8th Advanced Satellite Multimedia Systems Conference and the 14th Signal Processing for Space Communications Workshop (ASMS/SPSC), 2016 Employing high order constellations is inevitable in order to achieve higher spectral efficiency in satellite communi- cation systems. In DVB-S2X standard, constellations with up to 256 points have been included. However, optimizing such high order constellations is a difficult task.
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Near-Capacity Turbo Coded Soft-decision Aided DAPSK/Star-QAM [PDF]
, 2011 Low-complexity non-coherently detected Differential Amplitude and Phase-Shift Keying (DAPSK) schemes constitute an ideal candidate for wireless communications.
Liang, Dandan +5 more
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Delivery of 12QAM Single Carrier Signal in a MIMO Radio-Over-Fiber System at 60 GHz
IEEE Photonics Journal, 2017 As we know, the gap between 8-QAM and 16-QAM can be filled smoothly by introducing 12-QAM. In this paper, we experimentally demonstrated a reliable 10 Gbaud-rate transmission of polarization multiplexed 12-QAM single carrier signal in a MIMO radio-
Miao Kong, Wen Zhou
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Analisa Unjuk Kerja Software Defined Radio (SDR) dengan Teknik Quadrature Amplitude Modulation (QAM)
Infotekmesin: Media Komunikasi Ilmiah Politeknik Cilacap, 2021 The development of wireless communication technology require technology (software and hardware) that can keep up with changing standards. SDR platform is a software-based wireless technology that can keep up with technological developments without ...
Jenny Putri Hapsari, Munaf Ismail
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Exact BER of Rectangular-Constellation QAM Subjected to Asynchronous Co-Channel Interference and Nakagami-m Fading [PDF]
, 2006 The exact average bit error ratio (BER) of the rectangular quadrature amplitude modulation (QAM) constellation is studied in the context of asynchronous co-channel interference (CCI) and Nakagami-m fading.
Liu, X. +3 more
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Generalized Frequency Division Multiplexing-Based Low-Power Underwater Acoustic Image Transceiver
Sensors, 2021 In this paper, a low-power underwater acoustic (UWA) image transceiver based on generalized frequency division multiplexing (GFDM) modulation for underwater communication is proposed.
Chin-Feng Lin +5 more
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Energy Detection for M-QAM Signals [PDF]
IEEE Access, 2021 Accurate threshold setting for energy detector is important for example in dynamic spectrum access. This requires accurate statistical distribution models of the observed energy. In this paper, we consider energy detection (ED) for $M$ -ary quadrature amplitude modulation (QAM) signals.
Shun Ishihara +2 more
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An unequal error protection scheme for non-binary LDPC using statistical QAM and prioritized mapping [PDF]
Serbian Journal of Electrical Engineering, 2018 Low Density Parity Check (LDPC) codes are among the most popular channel codes used nowadays because of their ability to achieve near channel capacity performances.
Indoonundon Madhavsingh +1 more
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Exact and approximate log-likelihood ratio of M-ary QAM with two-time dimensions
ICT Express, 2019 A (3×2m)-ary QAM scheme maps a binary symbol into two-consecutive signal points (signal vector). It provides very lower PAPR than the conventional QAM because it removes corner signal points.
Ji-hoon Lee, Hae Chung
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Dynamic QAM Mapping for Physical-Layer Security Using Digital Chaos
IEEE Access, 2018 This paper proposes and experimentally demonstrates a physical-layer data encryption scheme using multi-fold chaotic mapping of quadrature amplitude modulation (QAM) symbols in orthogonal frequency-division-multiplexed passive optical network (OFDM-PON).
Amber Sultan +4 more
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