SS/PBCH Block Design in 5G New Radio (NR)

Lin, Zhipeng; Li, Jingya; Zhang, Yanli; Irukulapati, Naga VishnuKanth; Wang, Hai; Sahlin, Henrik

doi:10.1109/glocomw.2018.8644466

Cited by 23 publications

(9 citation statements)

References 2 publications

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“…In this Letter, we propose a lens-free wavefront shaping method utilizing synchronized signal block (SSB) beam alignment and genetic algorithm (GA) optimization (SSBGA) for a diffuse NLOS VLC system. Inspired by SSB beams in the 5G network [15] , our proposed SSBGA can manage the position and mobility of visible light beams to increase the efficiency of wavefront shaping. By utilizing this approach, we achieve a performance improvement of 23.9 dB in received optical power at a horizontal offset of 2 mm, surpassing lens-based CS by 21.7 dB on a 1.2 m NLOS VLC experimental platform.…”

Section: Introductionmentioning

confidence: 99%

Lens-free wavefront shaping method for a diffuse non-line-of-sight link in visible light communication

Chen,

Zhou,

et al. 2024

中国光学快报

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In this Letter, we propose and experimentally demonstrate a lens-free wavefront shaping method that utilizes synchronized signal block beam alignment and a genetic algorithm (SSBGA) for a diffuse non-line-of-sight (NLOS) visible light communication (VLC) system. The proposed method effectively controls the position and mobility of visible light beams by partitioning spatial light modulator pixels and manipulating beams to converge at distinct spatial positions, thereby enhancing wavefront shaping efficiency, which achieves a significant 23.9 dB optical power enhancement at 2 mm offset, surpassing the lens-based continuous sequence (CS) scheme by 21.7 dB. At 40°angle, the improvement reaches up to 11.8 dB and 16.8 dB compared to the results with and without lens-based CS, respectively. A maximum rate of 5.16 Gbps is successfully achieved using bit-power loading discrete multi-tone (DMT) modulation and the proposed SSBGA in an NLOS VLC system, which outperforms the lens-based CS by 1.07 Gbps and obtains a power saving of 55.6% during the transmission at 4 Gbps. To the best of our knowledge, this is the first time that high-speed communication has been realized in an NLOS VLC system without a lens.

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Section: Introductionmentioning

confidence: 99%

Lens-free wavefront shaping method for a diffuse non-line-of-sight link in visible light communication

Chen,

Zhou,

et al. 2024

中国光学快报

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“…The A 5 rd generation (5G) technology is one of most important wireless access technology, which is developed and improved by the 3rd generation partnership project (3GPP), 5G new radio (NR) is characterized many usage state to enhancing mobile broadband (eMBB), massive machine type communications (mMTC), critical machine type communication (cMTC), and ultra-reliable low latency communication (URLLC) [1]. 5G wireless technology is deliver high data rate with high speed, more reliability, more network capacity, higher performance, and connect a new industry [2].…”

Section: Introductionmentioning

confidence: 99%

Design of CRC circuit for 5G system using VHDL

et al. 2023

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In this document, we focus on how to design cyclic redundancy check (CRC) circuits with different 5G polynomial divisor using very high-speed integrated circuit (VHSIC) hardware description language (VHDL) to integrate in field-programmable gate array (FPGA) suitable kit using a suitable design code. The different between designed circuits came from the different of data size according to polynomials requirements conditions since there are huge data size in 5G system that required divide it with suitable method and then implemented the required circuit. CRC code as a polar code and short low density parity check (LDPC) is proposed in 5G new radio (NR) systems, CRC properties to divided data and CRC cod make it particularly very useful for codes with higher data rate and longer lengths, and for codes with low data rates and small length as an error detection method. The CRC encoder circuit (transmitter side) and CRC decoder circuit (receiver side) with different polynomial and data size have been designed using VHDL. Xilinx ISE 14.3 simulator, where the test bench simulation results give the expected simulator results of proposed decoding circuit scheme so to integrated using ZYNQ FPGA kit.

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“…Most of those studies have used alternate optimization assuming perfect channel state information at a transmitter (CSIT). However, in a real environment, it is difficult that a transmitter acquires the estimated channel matrices due to feedback overhead and almost wireless systems use a codebook of precoding matrices for feedback [ 10 , 11 , 12 , 13 ]. In the real systems, wireless transceivers that adopt hybrid beamforming use a protocol for beam management to determine analog beams [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…The feedback of precoding matrices is inefficient for suppressing dynamic IUI. Imperfect precoding severely degrades the performance of MU-MIMO systems [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Channel Feedback Scheme for Multi-User MIMO Hybrid Beamforming Systems

Lee

Song

2021

Sensors

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This paper proposes an efficient channel information feedback scheme to reduce the feedback overhead of multi-user multiple-input multiple-output (MU-MIMO) hybrid beamforming systems. As massive machine type communication (mMTC) was considered in the deployments of 5G, a transmitter of the hybrid beamforming system should communicate with multiple devices at the same time. To communicate with multiple devices in the same time and frequency slot, high-dimensional channel information should be used to control interferences between the receivers. Therefore, the feedback overhead for the channels of the devices is impractically high. To reduce the overhead, this paper uses common sparsity of channel and nonlinear quantization. To find a common sparse part of a wide frequency band, the proposed system uses minimum mean squared error orthogonal matching pursuit (MMSE-OMP). After the search of the common sparse basis, sparse vectors of subcarriers are searched by using the basis. The sparse vectors are quantized by a nonlinear codebook that is generated by conditional random vector quantization (RVQ). For the conditional RVQ, the Linde–Buzo–Gray (LBG) algorithm is used in conditional vector space. Typically, elements of sparse vectors are sorted according to magnitude by the OMP algorithm. The proposed quantization scheme considers the property for the conditional RVQ. For feedback, indices of the common sparse basis and the quantized sparse vectors are delivered and the channel is recovered at a transmitter for precoding of MU-MIMO. The simulation results show that the proposed scheme achieves lower MMSE for the recovered channel than that of the linear quantization scheme. Furthermore, the transmitter can adopt analog and digital precoding matrix freely by the recovered channel and achieve higher sum rate than that of conventional codebook-based MU-MIMO precoding schemes.

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SS/PBCH Block Design in 5G New Radio (NR)

Cited by 23 publications

References 2 publications

Lens-free wavefront shaping method for a diffuse non-line-of-sight link in visible light communication

Lens-free wavefront shaping method for a diffuse non-line-of-sight link in visible light communication

Design of CRC circuit for 5G system using VHDL

Efficient Channel Feedback Scheme for Multi-User MIMO Hybrid Beamforming Systems

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