5G/NR

5th generation mobile networks or 5th generation wireless systems is abbreviated as 5G, and proposed next telecommunications standards beyond the current 4G/IMT-Advanced standards. 5G planning aims at higher capacity than current 4G, allowing a higher density of mobile broadband users, and supporting device-to-device, ultra reliable, and massive machine communications. It’s research and development also aims at lower latency than 4G equipment and lower battery consumption, for better implementation of the Internet of things.

NR Physical Layer Specifications in 5G

February 26, 2019

A Work Item of the detailed specifications of 5G RAN for 5G commercial services is being conducted in 3GPP. The non-standalone NR specifications, which enable early deployment of NR carriers by exploiting LTE/LTE-Advanced carriers as the master node carriers, were completed in December 2017. In June 2018, the standalone NR specifications, which require full NR […]

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8.BWP/CA ( NR Physical Layer Specifications in 5G )

February 26, 2019

In NR, the maximum bandwidth per carrier is much larger than in LTE: 100 MHz at frequencies below 6 GHz and 400 MHz at higher frequencies. For carriers operated with such a large bandwidth, NR supports the BandWidth Part (BWP) concept whereby user equipment can use smaller bandwidths than the carrier bandwidth used by the […]

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7.Transmit Power Control ( NR Physical Layer Specifications in 5G)

February 26, 2019

7.1  Transmit Power Control Taking Beam Control into Consideration In NR, since transmitting/receiving beams can be formed in both the base station and the user equipment, transmission power control is specified by taking into consideration the beamforming op- eration, which causes beamforming gain variation when switching the transmitting/receiving beam. The user equipment can use reference signals […]

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6.Modulation and Channel Coding Schemes (NR Physical Layer Specifications in 5G)

February 26, 2019

Tables 2 and 3 show the modulation and channel coding schemes that can be used for NR downlink and uplink communication, respectively. Modulation Schemes As the primary modulation scheme, in addi- tion to the schemes specified since Release 8 LTE, 256QAM and π/2-BPSK that are available in the latest LTE are also supported in NR. […]

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5.Scheduling/HARQ ( NR Physical Layer Specifications in 5G )

February 26, 2019

In NR, as in LTE, the downlink data channels and uplink data channels are scheduled based on the Downlink Control Information (DCI). The DCI is transmitted and received via the Physical Down-link Control CHannel (PDCCH). As in LTE, it is possible to use the frequency domain resource as- signment field included in DCI to allocate […]

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4. MIMO/Beamforming / NR Physical Layer Specifications in 5G

February 26, 2019

4.1 MIMO Transmission Method In the high-frequency band, it is very important to obtain a high beamforming gain(Gain: One of the radiation characteristics of an antenna. An indicator of how many times larger the radiation strength in the antennaʼs direction of peak radiation is relative to a stand- ard antenna) by using many antennas to compensate […]

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3.Initial Access and Mobility / NR Physical Layer Specifications in 5G

February 26, 2019

A user equipmentʼs initial access in NR is per- formed according to a procedure that involves the steps of detecting a Synchronization Signal (SS), acquiring broadcast system information, and es-tablishing connection with the network by a ran- dom access procedure. 3.1  SS/PBCH Block As in LTE, the SS in NR consists of two signals: a Primary […]

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2.Frame Structure/Duplex Mode NR Physical Layer Specifications in 5G

February 26, 2019

2.1  Frame Structure/Duplex Mode Support for New Subcarrier Spacings NR adopts a radio access scheme called Orthog- onal Frequency Division Multiplexing (OFDM)( OFDM: A multi-carrier modulation format where information signals are modulated with orthogonal subcarriers. A type of digital modulation scheme where information is split across multiple orthogonal carriers and transmitted in parallel. It can […]

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What is Active Antenna System (AAS) and its 3D Aspect, Why AAS for 5G ?

November 9, 2018

What is Active Antenna System (AAS) and its 3D Aspect, Why AAS for 5G? An active antenna is an antenna that contains active electronic components like antenna-integrated radio designs place the RF module next to the passive antenna to reduce cable losses. Active Antenna does not need to be merely passive elements. With intelligent integration, active antenna […]

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Smart Antenna Techniques Part 3

November 9, 2018

Smart Antennas and Beam-forming, Understanding with GNU: Part 3 Recap from part-2 of this article Smart antenna systems or sometimes known as adaptive antenna array systems are composed of two major blocks; An adaptive antenna array block and a Signal processing block. Signal processing block is responsible for finding and adapting array beamforming weights and […]

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