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LoRaWAN® Gateways: Radio Coexistence Issues and Solutions

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LoRa Alliance ® Whitepaper Page 17 of 49 LoRaWAN ® Gateways Radio Coexistence Issues and Solutions Copyright ©2021 LoRa Alliance, Inc. All rights reserved. www.lora-alliance.org For a medium-range BS, the output power generated in the adjacent channel is therefore: 38dBm - 10*Log(10MHz/1MHz) - 45dB = -17dBm in 1MHz RBW = -27dBm in 100KHz RBW 3.3.4 OPERATING BAND UNWANTED EMISSIONS According to [5], the minimum requirement for unwanted emissions in operating band is detailed in the following table: Figure 14: Wide-area BS category A operating band unwanted emissions limits (E-UTRA bands < 1GHz) Considering a wide-area LTE BS: • The output power generated from 5 to 10MHz offset is -14dBm in 100KHz RBW. • The output power generated from 10MHz to 15MHz offset is -13dBm in 100KHz RBW. 3.3.5 SPURIOUS EMISSIONS According to [5], there are three types of minimum requirements for out-of-band spurious emissions: 1. Mandatory requirements 2. Additional spurious emissions for the protection of systems operating in frequency ranges other than the E-UTRA BS downlink operating band. The limits may apply as an optional protection of such systems that are deployed in the same geographical area as the E-UTRA BS, or they may be set by local or regional regulation as a mandatory requirement for an E-UTRA operating band. 3. Colocation with other base stations for the protection of other BS receivers when UTRA FDD, UTRA TDD, E-UTRA, and/or NR BS are colocated with an E-UTRA BS.

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