BR/TSD

1
Workshop for CEE, CIS and Baltic States
BR/TSD
Compatibility Analysis
BCD
???????? 2004?????? David Botha
?????? 2004
2
Workshop for CEE, CIS and Baltic States
Basis of the analysis
BR/TSD
BCD
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

?????? 2004
3
Workshop for CEE, CIS and Baltic States
Basis of the analysis
BR/TSD
BCD
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.

?????? 2004
4
Workshop for CEE, CIS and Baltic States
Basis of the analysis
BR/TSD
BCD
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.

?????? 2004
5
Workshop for CEE, CIS and Baltic States
Basis of the analysis
BR/TSD
BCD
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.

?????? 2004
6
Workshop for CEE, CIS and Baltic States
Basis of the analysis
BR/TSD
BCD
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
• 1.6451.4145.5 dB fixed and mobile reception
• 1.6452.05.5 dB portable indoor reception.

?????? 2004
7
Workshop for CEE, CIS and Baltic States
BR/TSD
BCD
?????? 2004
8
Workshop for CEE, CIS and Baltic States
BR/TSD
BCD
???????
?????? 2004