Results 21 to 30 of about 137 (124)
Capacity-Approaching Non-Binary Turbo Codes: A Hybrid Design Based on EXIT Charts and Union Bounds
IEEE Access, 2018 In this paper, we introduce a novel design approach for capacity-approaching non-binary turbo codes. There are two important factors that impact the performance of turbo codes in general: 1) the convergence behavior of iterative decoding in the low ...
Toshiki Matsumine, Hideki Ochiai
doaj +1 more source
Superposition Coded Modulation Based Faster‐Than‐Nyquist Signaling
Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018 A structure of faster‐than‐Nyquist (FTN) signaling combined with superposition coded modulation (SCM) is considered. The so‐called FTN‐SCM structure is able to achieve the constrained capacity of FTN signaling and only requires a low detection complexity. By deriving a new observation model suitable for FTN‐SCM, we offer the power allocation based on a
Shuangyang Li +5 more
wiley +1 more source
Nonuniform Code Multiple Access
Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018 For sparse code multiple access advanced (SCMAA), the quality of initial information on each resource node and the convergence reliability of the detected user in each decision process were unsatisfactory at the message passing algorithm (MPA) receiver. Driven by these problems, this paper proposes a nonuniform code multiple access (NCMA) scheme.
Cheng Yan +3 more
wiley +1 more source
IEEE 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
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Journal of Engineering, Volume 2016, Issue 1, 2016., 2016 This paper presents a possible simulation of negative effects in the optical transmission medium and an analysis for the utilization of different signal processing techniques at the optical signal transmission. An attention is focused on the high data rate signal transmission in the optical fiber influenced by linear and nonlinear environmental effects
Filip Čertík +2 more
wiley +1 more source
Turbo Trellis Coded Modulation (TTCM) with Imperfect Phase Reference
Electrica, 2019 In this paper, we investigate the performance of Turbo Trellis Coded Modulation (TTCM) over AWGN, and Rician channels and assume that phase disturbance is available.
Osman N. Ucan, Onur Osman
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Performance and Complexity Evaluation of Iterative Receiver for Coded MIMO‐OFDM Systems
Mobile Information Systems, Volume 2016, Issue 1, 2016., 2016 Multiple‐input multiple‐output (MIMO) technology in combination with channel coding technique is a promising solution for reliable high data rate transmission in future wireless communication systems. However, these technologies pose significant challenges for the design of an iterative receiver.
Rida El Chall +4 more
wiley +1 more source
XOR‐FREE Implementation of Convolutional Encoder for Reconfigurable Hardware
International Journal of Reconfigurable Computing, Volume 2016, Issue 1, 2016., 2016 This paper presents a novel XOR‐FREE algorithm to implement the convolutional encoder using reconfigurable hardware. The approach completely removes the XOR processing of a chosen nonsystematic, feedforward generator polynomial of larger constraint length.
Gaurav Purohit +3 more
wiley +1 more source
Space-Time Turbo Coded Modulation: Design and Applications
EURASIP 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
IEEE Access, 2019 In this paper, we study the resource allocation problem, including the joint consideration of user grouping and power allocation, of an, underlay cognitive radio (CR) network employing non-orthogonal multiple access (NOMA), which is referred to as the ...
Wei Liang +4 more
doaj +1 more source