BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCD Compatibility Analysis
Сентябрь 2004Москва
David Botha
BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCDBasis of the analysis
Input data
• ST61 plan as on December 2003;• Limited to the assignments in bands IV/V;• Selected assignments with ERP 10 kW;• No additional transmissions were considered;
BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCDBasis of the analysis
Technical considerations
• Analogue assignments to be converted into digital;• All assignment characteristics retained, except ERP
reduced by 7 dB;• No change to the assigned channel;• All digital transmissions were assumed to be
16QAM, code rate 2/3;• No receiving antenna directivity or polarisation
discrimination for mobile and portable indoor reception;
• For fixed reception receiving antenna directivity and polarisation were taken into account.
BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCDBasis of the analysis
Approach to the analysis
• Analyses were performed for fixed, mobile and portable indoor reception;
• Each reception mode scenario was treated separately (no mixing of the reception modes);
• Only co-channel interference was considered;• The power sum method was used for multiple
interference cases.
BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCDBasis of the analysis
Technical parameters used
• Minimum median usable field strength values used (at 471.25 MHz):• 47.0 dBμV/m fixed reception;• 76.0 dBμV/m mobile reception;• 84.0 dBμV/m portable indoor reception.
• Values corrected for frequency variation by:• 20log(f/471.25) fixed reception;• 30log(f/471.25) mobile and portable indoor
reception.
BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCDBasis of the analysis
Technical parameters used continued
• Protection ratios:• 14.0 dB fixed reception;• 20.0 dB mobile reception;• 17.0 dB portable indoor reception.
• Combined location variation values:• 1.645*1.414*5.5 dB fixed and mobile reception;• 1.645*2.0*5.5 dB portable indoor reception.
BR/TSD
Москва 2004
Workshop for CEE, CIS and Baltic States
BCD
Спасибо