Results 41 to 50 of about 3,362 (185)
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
openaire +4 more sources
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
doaj +1 more source
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
doaj +1 more source
Comb‐Driven Coherent Optical Transmitter for Scalable DWDM Interconnects
Laser &Photonics Reviews, EarlyView.A comb‐driven coherent optical transmitter on a Si/SiN platform enables scalable DWDM interconnects by integrating ultra‐compact microring‐assisted modulators and interleavers. High‐baud coherent signaling achieves 400 Gb/s per wavelength and >$>$1 Tb/s multi‐channel transmission, with projected >$>$10 Tb/s per fiber, offering a path toward energy ...
Alireza Geravand +11 more
wiley +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT In this paper, the correlation learning estimation and adaptive reduction (CLEAR) of interference, an adaptive, blind and transparent interference compensation method applied in a wideband dual‐channel receiver, is studied for a pair of independent satellite multi‐connectivity links, using the same carrier frequency and signal bandwidth in use
Svilen Dimitrov
wiley +1 more source
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
doaj +1 more source
Performance Improvement of Multi-UserMC-CDMA system Using Discrete Hartly Transform Mapper [PDF]
Engineering and Technology Journal, 2013 Future wireless communication systems must be able to accommodate a large number of users and simultaneously to provide the high data rates at the required quality of service. In this paper a method is proposed to perform the N-Discrete Hartley Transform
Ali T. Shaheen
doaj +1 more source
Low Complexity Golden Code Analytical and Deep Learning-Based Sphere-Decoders for High-Density M-QAM
IEEE Access, 2022 In this paper, we develop low complexity Golden code sphere-decoding (SD) algorithms for high-density M-ary quadrature amplitude modulation (M-QAM). We define the high-density M-QAM as having modulation orders ( $M$ ) of at least 64, i.e.
Bhekisizwe Mthethwa, Hongjun Xu
doaj +1 more source
Asia‐Pacific Economic History Review, EarlyView.Abstract New Zealand's early‐twentieth‐century health service was a two‐tier system of state hospitals supported by an expanding network of over 300 private hospitals, almost exclusively owned by nurses and midwives. This article will show that this environment was created by a legislative framework introduced between 1901 and 1906, requiring nurses ...
Ann‐Marie Quinn
wiley +1 more source
Enabling Technology in High-Baud-Rate Coherent Optical Communication Systems
IEEE Access, 2020 High-baud-rate coherent optical system is essential to support the ever-increasing demand for high-speed applications. Owing to the recent progress in advanced modulation formats, over 1 Tb/s single-carrier data transmission has been achieved in the ...
Si-Ao Li +10 more
doaj +1 more source