Results 241 to 250 of about 33,278 (292)

Channel Dependent Codebook Design in Spatial Modulation

2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2018
In this paper, we present a modulation design based on Spatial Modulation for the uplink in IoT applications. The proposed modulation design uses a Tabu search based deterministic heuristic to adapt the modulation link based on channel information fed back by the receiver. Our approach allows adaptivity to rate and energy constraints.
Baptiste Cavarec, Mats Bengtsson
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Joint Codebook Design for Multi-cell Noma

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2019
For spreading-based multiple access, whether orthogonal (OMA) or non-orthogonal (NOMA), the spreading sequences (signatures) are selected from a predefined codebook. When operating in a cellular system, intercell interference will be inherently present between close base stations that share the same resources.
Bashar Tahir, Stefan Schwarz, Markus Rupp   +2 more
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Hierarchical codebook design for fast search with Grassmannian codebook

2012 IEEE Wireless Communications and Networking Conference (WCNC), 2012
It 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 0001
openaire   +1 more source

Simulated annealing and codebook design

ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003
The 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 ...
Jacques Vaisey, Allen Gersho
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Robust Codebook Design Based on Unitary Rotation of Grassmannian Codebook

2010 IEEE 72nd Vehicular Technology Conference - Fall, 2010
Codebook 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 0001, Haiyan Jia, Jianfeng Kang   +2 more
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SCMA-OFDM Codebook Design based on IRM

2021 International Wireless Communications and Mobile Computing (IWCMC), 2021
Sparse 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, Shuyan Ni, Naiping Cheng, Aidi Zhang, Xin Song, DaShuang Yan   +5 more
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Design of Codebook for High Overload SCMA

2020
With the development of mobile communication and multiple access technology, SCMA (Sparse Code Division Multiple Access) technology, as a new access technology, can improve the overload rate, gain coding gain and maintain low complexity because of the limited spectrum resources in the new demand scenario.
Min Jia 0001, Shiyao Meng, Qing Guo 0001, Xuemai Gu   +3 more
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Codebook Design for LTE-A Downlink System

2011 IEEE Vehicular Technology Conference (VTC Fall), 2011
Multiple-input multiple-output (MIMO) has been adopted by long term evolution (LTE) and its updated version LTE-Advanced (LTE-A) to increase the spectrum efficiency. However, the benefits of multi-user (MU) MIMO highly rely on the accurate channel knowledge at the transmitter. So proper codebook design is a key problem for LTE-A FDD downlink system. In
Lu Wu, Jinhui Chen, Hongwei Yang, Di Lu 0009   +3 more
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Performance Study of SCMA Codebook Design

2017 IEEE Wireless Communications and Networking Conference (WCNC), 2017
Sparse 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 0013
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