A Review of the 3GPP-Compatible Model of 5G in-Band Emissions in Uplink Resource Allocation in Hybrid Network

AbstractIn-band emission represents a critical metric for assessing the reliability of a mobile communication network and ensuring quality of service (QoS) for end users. In the 5G network deployment, due to the limited availability of frequency spectrum, mobile users and internet-of-things (IoT) devices will transmit on the same frequency bands, necessitating more stringent in-band interference management to facilitate interference-free communication. In order to ensure that high-power user equipment (UEs) accessing the shared 5G uplink channel are able to communicate without disruption and without interfering with low-power devices, it is imperative to undertake in-band emissions analysis and control. This paper explores the issue of in-band emission interference, which pertains to the interference that arises in unallocated sub-bands within a specific bandwidth. Specifically, this investigation delves into the modeling approach and regulated in-band emissions within a non-standalone (NSA) 5G network. To verify compliance with 3GPP requirements for in-band emissions regulations, an over-the-air (OTA) testing system is employed to examine in-band emissions in the physical uplink shared channel (PUSCH). The study employs various resource block distributions, offsets, and modulation techniques within the specified NR channel bandwidth. All simulations are based on 3GPP specifications.KEYWORDS: Cyclic-prefix orthogonal frequency division multiplexing (CP-OFDM)Frequency spectrumIn-band emissionsNon-standalone (NSA) networkOver-the-air (OTA) measurementPhysical uplink shared channel (PUSCH)Resource block (RB) allocationTransmission bandwidth Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsPermvir SinghPermvir Singh received his MSc degree from the University of Sussex, UK in 2020. He graduated from the Institution of Electronics and Telecommunication Engineers (IETE), New Delhi, India in 2007. He served in leading telecom companies. Currently, he is with Rohde & Schwarz (India) in the Department of Test and Measurement. His research interests include wireless communication, physical layer, multi-user MIMO communications, massive MIMO, millimeter wave communication, joint communication and sensing, antennas and microwaves, and terahertz frequencies. Corresponding author. Email: permvir.s@gmail.com