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LoRaWAN® Gateways: Radio Coexistence Issues and Solutions

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LoRa Alliance ® Whitepaper Page 37 of 49 LoRaWAN ® Gateways Radio Coexistence Issues and Solutions Copyright ©2021 LoRa Alliance, Inc. All rights reserved. www.lora-alliance.org 5.2 DVB-T/T2 OUT-OF-BAND SPURIOUS EMISSIONS The essential requirements of the digital terrestrial TV transmitters are detailed in the ETSI EN 302 296 documents (see [6]). Considering the out-of-band spurious emissions, the limits are detailed in the following figure: Figure 27: Spurious emissions limits for DVB-T/T2 transmitters (antenna port, RBW = 100KHz) From 10KW to 100KW, the limit is then -105dBc in 100KHz RBW. Considering a 69dBm output power (conducted) transmitter, the limit of spurious emissions in 100KHz RBW is then: Spurious emissions = 69dBm - 10*Log(8MHz/100KHz) - 105 = -55dBm in 100KHz RBW The required out-of-band limits are detailed in the following figure: Figure 28: Out-of-band limits for H1 transmitter (antenna port, RBW = 3KHz)

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