5G New Radio: Waveform, Frame Structure, Multiple Access, and Initial Access

2017 ◽  
Vol 55 (6) ◽  
pp. 64-71 ◽  
Author(s):  
Shao-Yu Lien ◽  
Shin-Lin Shieh ◽  
Yenming Huang ◽  
Borching Su ◽  
Yung-Lin Hsu ◽  
...  
Keyword(s):  
Multiple Access ◽  
Frame Structure ◽  
New Radio

scholarly journals Exploiting outage performance in device-to-device for user grouping

2021 ◽  
Vol 24 (2) ◽  
pp. 904
Author(s):  
Dinh-Thuan Do ◽  
Chi-Bao Le
Keyword(s):  
System Performance ◽  
Multiple Access ◽  
Base Station ◽  
Spectrum Efficiency ◽  
Frame Structure ◽  
Outage Performance ◽  
User Grouping ◽  
Numerical Result ◽  
Device To Device ◽  
New Form

The spectrum efficiency and massive connections are joint designed in new form of device-to-device for user grouping. A pair of users is implemented with nonorthogonal multiple access (NOMA) systems. Although NOMA benefits to such system in term of the serving users, device to device (D2D) faces the interference from normal cellular users (CUE). In particular, we derive exact formulas of outage probability to show system performance. In this article, we compare two schemes to find relevant scheme to implement in practice. The frame structure is designed with two timeslot related to uplink and downlink between the base station and D2D users. We confirm the better scheme in numerical result by considering the impacts of many parameters on outage performance.

scholarly journals Analysis of 5G New Radio Uplink Signals on an Analogue-RoF System Based on DSP-Assisted Channel Aggregation

2018 ◽  
Vol 9 (1) ◽  
pp. 47 ◽  
Author(s):  
Befekadu Mengesha ◽  
Pablo Torres-Ferrera ◽  
Roberto Gaudino
Keyword(s):  
Multiple Access ◽  
Digital Signal ◽  
Efficiency Gain ◽  
Error Vector Magnitude ◽  
Access Technology ◽  
Radio Access Technology ◽  
Performance Requirements ◽  
Radio Access ◽  
New Radio ◽  
Aggregation Techniques

The 3rd Generation Partnership Project (3GPP) is in the process of developing 5th generation (5G) radio access technology, the so-called new radio (NR). The aim is to achieve the performance requirements forIMT-2020 radio interface technology. In this paper, we focus on the analysis of the transmission of 5G NR uplink physical channels, such as physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH), dedicated for data and control channels, respectively, as specified in the 3GPP standard, using digital signal processing (DSP)-assisted frequency division multiple access (FDMA) and time division multiple access (TDMA) channel aggregation techniques on an analogue radio-over-fiber (A-RoF) architecture. We verified that there is ~34% spectral efficiency gain and lower error vector magnitude (EVM) achieved using the TDMA technique.

Waveform division multiple-access

1993 ◽  
Vol 140 (3) ◽  
pp. 176 ◽  
Author(s):  
A.B. Sesay ◽  
P.C. Yip ◽  
K.M. Wong
Keyword(s):  
Multiple Access
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