to account for the fall time to account for both the rise and fall times combination : pulse length including rise and fall times : pulse rise time tr : pulse fall time tf : bandwidth of the frequency deviation (total frequency shift during the pulse Bc generation) : the maximum range over which the carrier frequency will be shifted, equals BS Bs zero for non-frequency hopping cases. Equation (7) is valid only when the following conditions are met: 1. the product is greater than or equal to 0.10; and 2. that the product of or compression ratio must be greater than 10. Otherwise (8) where is 0.105 when 6.2, and 0.065 when 7.6 A K K Carrier Wave (9) where is the carrier frequency. FC Frequency modulated carrier wave (10) where is the total frequency deviation and is the chirp period. BR T 2.2.3.2 Recommendation ITU-R SM.1541-6 then defines a roll off to 60 dBc point of either 20 (CW/FMCW/Phase Coded) or 30 dB per decade with a design objective of 40 dB per decade. 2.3 Comparison of the Regulatory and Guidance Material 2.3.1 Introduction 2.3.1.1 The following section investigates the consistency between the regulatory/guidance provisions highlighted above based on the aeronautical radars operation in the frequency band 2 700-3 100 MHz as contained in Recommendation ITU-R SM.1464-2. The technical characteristics of aeronautical radar used in this document are contained in Annex 1, noting that a number of radars have been excluded either because there were insufficient details available or they are not used for air traffic control purposes. 2.3.2 Primary Radar 2.3.2.1 Comparison
to account for the fall time to account for both the rise and fall times combination : pulse length including rise and fall times tr : pulse rise time tf : pulse fall time Bc : bandwidth of the frequency deviation (total frequency shift during the pulse generation) BS : the maximum range over which the carrier frequency will be shifted, Bs equals zero for non-frequency hopping cases. Equation (7) is valid only when the following conditions are met: 1. the product is greater than or equal to 0.10; and 2. that the product of or compression ratio must be greater than 10. Otherwise where A is 0.105 when K 6.2, and 0.065 when K 7.6 (8) Carrier Wave where FC is the carrier frequency. (9) Frequency modulated carrier wave where BR is the total frequency deviation and T is the chirp period. (10) 2.2.3.2 Recommendation ITU-R SM.1541-6 then defines a roll off to 60 dBc point of either 20 (CW/FMCW/Phase Coded) or 30 dB per decade with a design objective of 40 dB per decade. 2.3 Comparison of the Regulatory and Guidance Material 2.3.1 Introduction 2.3.1.1 The following section investigates the consistency between the regulatory/guidance provisions highlighted above based on the aeronautical radars operation in the frequency band 2 700-3 100 MHz as contained in Recommendation ITU-R SM.1464-2. The technical characteristics of aeronautical radar used in this document are contained in Annex 1, noting that a number of radars have been excluded either because there were insufficient details available or they are not used for air traffic control purposes. 2.3.2 Primary Radar 2.3.2.1 Comparison
FSMP-WG03-WP09_Radar%20Spectral%20Mask.docx