A1.4 The study scenarios and basic system parameters This SEAMCAT simulation study covers six situations in a rural environment with both the (tactical system) and the (amateur station) links operating on the same ‘victim’ ‘interfering’ frequency of 52 MHz: Base station transmitting to vehicle receiver. – Base station transmitting to handset receiver. – Vehicle transmitting to base station receiver. – Vehicle transmitting to handset receiver. – Handset transmitting to base station receiver. – Handset transmitting to vehicle receiver. – Each simulation was run for 20 000 individual random positions with the amateur transmitter free to operate anywhere within a 40 km radius of a tactical transmitter. All the relevant SEAMCAT parameters are given in Table A1.8. The transmission mode of the amateur station is single sideband suppressed carrier (SSB) using a 100 W Peak-Envelope-Power (PEP) transmitter operating with a duty cycle of 5 % which represents 1.2 hours of transmission per day. The amateur transmit and receive antennas have a gain of 9.4 dBi and are located 10 m above ground. The emission mask of the amateur signal is shown in Figure A1.5. The (tactical) system specifications used for the SEAMCAT studies are shown in Table ‘victim’ A1.1 through A1.5: Using the parameters specified for the Protection Criteria of = -6 dB and 10 dB SINAD the I/N equivalent SEAMCAT Noise Floor and Interference Criteria were calculated and a given in Table A1.5 A1.5 SEAMCAT noise floor and interference criteria used for this study floor -126.9 dBm = -169 + 10 log10(16000) 16.97 dB C/I 10 dB C/(N+I) 0.97 dB (N+I)/N -6 dB I/N A1.5 Operational Considerations Tactical systems are likely to be deployed rapidly in response to various situations, operate for a relatively short period of time (hours to days) and then be stood down or moved to another area. The vehicular and handset assets are likely to be highly mobile and move continuously or intermittently throughout the service area, not remaining in any given position for an extended period of time. The handset devices carried by the user have a limited range and the user is highly likely to remain in close proximity to the host vehicle at all times otherwise communication may be lost.
A1.4 The study scenarios and basic system parameters This SEAMCAT simulation study covers six situations in a rural environment with both the ‘victim’ (tactical system) and the ‘interfering’ (amateur station) links operating on the same frequency of 52 MHz: – Base station transmitting to vehicle receiver. – Base station transmitting to handset receiver. – Vehicle transmitting to base station receiver. – Vehicle transmitting to handset receiver. – Handset transmitting to base station receiver. – Handset transmitting to vehicle receiver. Each simulation was run for 20 000 individual random positions with the amateur transmitter free to operate anywhere within a 40 km radius of a tactical transmitter. All the relevant SEAMCAT parameters are given in Table A1.8. The transmission mode of the amateur station is single sideband suppressed carrier (SSB) using a 100 W Peak-Envelope-Power (PEP) transmitter operating with a duty cycle of 5 % which represents 1.2 hours of transmission per day. The amateur transmit and receive antennas have a gain of 9.4 dBi and are located 10 m above ground. The emission mask of the amateur signal is shown in Figure A1.5. The ‘victim’ (tactical) system specifications used for the SEAMCAT studies are shown in Table A1.1 through A1.5: Using the parameters specified for the Protection Criteria of I/N = -6 dB and 10 dB SINAD the equivalent SEAMCAT Noise Floor and Interference Criteria were calculated and a given in Table A1.5 A1.5 SEAMCAT noise floor and interference criteria used for this study floor -126.9 dBm = -169 + 10 log10(16000) C/I 16.97 dB C/(N+I) 10 dB (N+I)/N 0.97 dB I/N -6 dB A1.5 Operational Considerations Tactical systems are likely to be deployed rapidly in response to various situations, operate for a relatively short period of time (hours to days) and then be stood down or moved to another area. The vehicular and handset assets are likely to be highly mobile and move continuously or intermittently throughout the service area, not remaining in any given position for an extended period of time. The handset devices carried by the user have a limited range and the user is highly likely to remain in close proximity to the host vehicle at all times otherwise communication may be lost.
R15-WP5A-C-0469!N14!MSW-E.docx