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EC PROJECTS 79GHz


“By using a common 76GHz to 81GHz technology platform a holistic and flexible system concept can be established”


relationship is linear and results, when comparing 24 GHz with 79 GHz, in a ratio-factor of three. Another interesting benefit is the common usage of one


technology concept for all applications: currently automotive radar applications use different frequency ranges for the dif- ferent applications. By using a common 76GHz to 81GHz technology platform a holistic and flexible system concept can be established. This results in advantages regarding sys- tem development and multi-functional use of individual sensors. Finally, mutual interference risk is low due to the smaller


emission power: compared with the 77 GHz long range radar (and also the 24 GHz narrowband devices) the average emis- sion power of 79 GHz is three orders of magnitude lower, the interference distance is more than one order of magnitude lower, resulting in more robustness and interference margin.


WORLDWIDE PROGRESS OF FREQUENCY ALLOCATION: AN OVERVIEW At the beginning of the project in 2011, the 79GHz radar equipment was only authorised in the 27 EC member states, in most of the further 21 CEPT countries, in Singapore and Australia. In all other countries, the operation of 79 GHz


radar devices was not possible due to the lack of any regula- tory framework for this frequency band. Various actions have been taken by the 79GHz project


partners to boost the allocation process and the current sta- tus of allocation is illustrated in Figure 4. In the USA, there have been extensive discussions and sev-


eral meetings with Federal Communications Commission (FCC) and tests have been carried out to evaluate the inter- ference with radio astronomy sites equipped with radar operating at the same frequencies. A petition to adopt and release the 77-81GHz band is expected by the end of 2013. Canada’s decision regarding 79GHz partially follows the USA FCC rules due to the cross border situation and direct neighbourhood to the USA. Several Gulf States are preparing for the introduction


and in Brazil there are ongoing activities between ANATEL (the frequency authority in Brazil) and AEA (Associação Brasileira de Engenharia Automotiva). In Argentina, the CSA79GHz project is in contact with CNC (Comisión Nacional de Comunicaciones) and SECOM (Secretariat of Communications). In Chile, SUBTEL (Subsecretaría de Telecomunicaciones) has now regulated the 79 GHz band. China and India have currently no regulation for 79GHz but


Figure 4: Overview of 79GHz allocation status


26


thinkinghighways.com


Vol 8 No 3 Europe/Rest of the World


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