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Improved algorithms for VQ codeword search, codebook design and codebook index assignment
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Hierarchical codebook design for fast search with Grassmannian codebook
2012 IEEE Wireless Communications and Networking Conference (WCNC), 2012It has been well known that channel aware systems (closed-loop) have better performance than channel unknown systems (open-loop). In order to know channel in the transmitter, receivers should send own channel information the transmitter through reverse channel.
Kyeongjun Ko, Jungwoo Lee
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Robust Codebook Design Based on Unitary Rotation of Grassmannian Codebook
2010 IEEE 72nd Vehicular Technology Conference - Fall, 2010Codebook design has been investigated extensively over the past few years for quantized precoding in Multiple-Input Multiple-Output (MIMO) communication system. Grassmannian line packing (GLP) codebook is widely used in industry and literature. Traditional GLP codebook can only show good performance in spatial uncorrelated channel.
Shaohua Li, Haiyan Jia, Jianfeng Kang
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Performance Study of SCMA Codebook Design
2017 IEEE Wireless Communications and Networking Conference (WCNC), 2017Sparse code multiple access (SCMA) is a non- orthogonal codebook (CB) based multiple access scheme, proposed to cope with the heterogeneous and challenging performance requirements for mission critical communication and massive machine-type communication (MTC) in the fifth Generation (5G) wireless system. In this paper, the performance of SCMA has been
Mehmood Alam, Qi Zhang
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Simulated annealing and codebook design
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003The application of simulated annealing to the design of a codebook for a vector quantizer (VQ) that is used to code images are studied. The traditional method for VQ codebook design is to use the generalized Lloyd algorithm (GLA), an iterative optimization procedure where an initial codebook is continually refined so that each iteration reduces the ...
J. Vaisey, A. Gersho
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2019 9th International Conference on Advances in Computing and Communication (ICACC), 2019
Sparse code multiple access (SCMA) is one of the promising non-orthogonal multiple access which utilizes iterative message passing algorithm (MPA) as decoding technique. This paper discusses about, basics of SCMA, mapping of information to codebooks, codebook structure and functioning of receiver. In SCMA, each user has their own codebook.
J Prabhavathi bhai, K Rama Naidu
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Sparse code multiple access (SCMA) is one of the promising non-orthogonal multiple access which utilizes iterative message passing algorithm (MPA) as decoding technique. This paper discusses about, basics of SCMA, mapping of information to codebooks, codebook structure and functioning of receiver. In SCMA, each user has their own codebook.
J Prabhavathi bhai, K Rama Naidu
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SCMA-OFDM Codebook Design based on IRM
2021 International Wireless Communications and Mobile Computing (IWCMC), 2021Sparse code division multiple access (SCMA), as a new radio technology in 5G, can be modulated by Orthogonal frequency division multiplexing (OFDM) technology to improve the link quality of a Single-user. In this paper, a codebook design method based on frequency resources is proposed in the case of Single-user SCMA-OFDM.
TuoFeng Lei +5 more
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Fast algorithm for VQ codebook design
IEE Proceedings I Communications, Speech and Vision, 1991The paper presents a fast codebook training algorithm for vector quantisation. It uses an elimination rule, based on triangular inequality criteria, as well as the partial distortion elimination method, to relieve the computational burden of a conventional codebook training algorithm, including a binary codeword splitting algorithm for the initial ...
null Sin-Horng Chen, W.M. Hsieh
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Codebook Design for MIMO Retransmission System
IEEE Communications Letters, 2011This letter proposes a new retransmission structure with multiple retransmission codebooks for a linear precoding-based closed-loop multiple-input multiple-output (CL-MIMO) system. While conventional codebooks are defined only for the initial transmission in CL-MIMO systems, we propose a multiple codebook structure in which a different codebook is used
Jinwoo Kim, Chung G. Kang
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