Results 11 to 20 of about 157 (142)

Improving Capacity in LMDS Networks Using Trellis-Coded Modulation

open access: yesEURASIP Journal on Wireless Communications and Networking, 2004
Local multipoint distribution systems (LMDS), which are operating worldwide in the frequency range of 26 to 43 GHz, have large bandwidths of 0.1 up to 2 GHz but a limited area coverage of a few kilometers only.
Bose Ranjan
doaj   +2 more sources

M-PSK Cooperative Trellis Codes for Coordinate Interleaved Coded Cooperation

open access: yesEURASIP Journal on Wireless Communications and Networking, 2009
M-PSK cooperative trellis codes are proposed for two-user coordinate interleaved coded cooperation operating over quasistatic Rayleigh fading channels.
Özgür Oruç   +1 more
doaj   +2 more sources

New Trellis Code Design for Spatial Modulation

open access: yesIEEE Transactions on Wireless Communications, 2011
Spatial modulation (SM), in which multiple antennas are used to convey information besides the conventional M-ary signal constellations, is a new multiple-input multiple-output (MIMO) transmission technique, which has recently been proposed as an alternative to V-BLAST (vertical Bell Labs layered space-time).
Basar, Ertugrul   +3 more
openaire   +4 more sources

Space-Time Turbo Trellis Coded Modulation for Wireless Data Communications

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
This paper presents the design of space-time turbo trellis coded modulation (ST turbo TCM) for improving the bandwidth efficiency and the reliability of future wireless data networks.
Welly Firmanto   +3 more
doaj   +1 more source

Combined Source-Channel Coding of Images under Power and Bandwidth Constraints

open access: yesEURASIP Journal on Advances in Signal Processing, 2007
This paper proposes a framework for combined source-channel coding for a power and bandwidth constrained noisy channel. The framework is applied to progressive image transmission using constant envelope M-ary phase shift key (M-PSK) signaling over an ...
Marc Fossorier   +2 more
doaj   +2 more sources

Modified SNR Gap Approximation for Resource Allocation in LDPC-Coded Multicarrier Systems

open access: yesIEEE Access, 2020
The signal-to-noise ratio (SNR) gap approximation provides a closed-form expression for the SNR required for a coded modulation system to achieve a given target error performance for a given constellation size. This approximation has been widely used for
Adriaan Suls   +3 more
doaj   +1 more source

LDPC-Coded Generalized Frequency Division Multiplexing for Intensity-Modulated Direct-Detection Optical Systems

open access: yesIEEE Photonics Journal, 2019
In this paper, a low-density parity check (LDPC) coded GFDM with high-level modulation scheme is proposed for more flexible and advanced multicarrier modulation in intensity-modulated/direct-detection (IM/DD) optical systems.
Dong Guo   +10 more
doaj   +1 more source

Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System

open access: yesIEEE Photonics Journal, 2017
This paper proposes and demonstrates a 31.25 Gbps two-dimensional eight level pulse amplitude modulation with trellis coded modulation (2D-PAM8-TCM) transmission in intensity modulation and direct detection based short reach system. In this system,
Yan Fu   +5 more
doaj   +1 more source

CG-SCMA Codebook Design Based on Maximized Euclidian Distance

open access: yesJournal of Telecommunications and Information Technology, 2023
Sparse code multiple access (SCMA) is a multi-dimensional codebook based on a class of non-orthogonal multiple access (NOMA) technologies enabling the delivery of non-orthogonal resource elements to numerous users in 5G wireless communications without ...
Sura S. Mohamed, Hikmat N. Abdullah
doaj   +1 more source

Space-Time Turbo Coded Modulation: Design and Applications

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
A design method for recursive space-time trellis codes and parallel-concatenated space-time turbo coded modulation is proposed that can be applied to an arbitrary existing space-time trellis code.
Tujkovic Djordje   +2 more
doaj   +1 more source

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