FM방송의 인접국 간섭환경에서 적응적 혼신보호비 변경에 의한 가용주파수 확보 방안

다국어 초록 (Multilingual Abstract)

The channels of domestic FM broadcast are needed to provide various kinds of new broadcasting services. However, available channels are limited and saturated. The channel interval of FM broadcast is changed from 200 ㎑ to 100 ㎑ to maximize utilization efficiency of scarce broadcast spectrum at all over the world. Also, there are many researches such as IBOC(In Band On Channel) and DRM+(Digital Radio Mondial+) that is to allocate the digital signal beside analog bandwidth. But output power is decrease to avoid interference between adjacent radio stations. In this paper, we analyzes the problems of the protection ratio which is decided in 1986 and we propose method to improve about 7∼10㏈ significantly the protection ratio according to the recent DSP(Digital Signal Processing) techniques without loss of both transmission power and broadcast quality. In addition, we examined the possibility of securing two times available channels by reducing minimum frequency interval from 800 ㎑ to 400 ㎑ or 600 ㎑ in the equal site.

참고문헌 (Reference)

1 Newzealand, ministry of economic development,

2 방송통신위원회, "방송구역전계강도의 기준·작성요령 및 표시방법"

3 방송통신위원회, "무선설비규칙 제5장 방송표준방식 및 방송업무용 무선설비의 기술기준"

4 정영호, "동일채널 FM 간섭원에 대한 IBAC DAB 시스템의 혼신보호비 분석" 5 (5): 199-210, 2000

5 최연자, "국내 FM 방송에서 채널 간격의 축소에 따른 스펙트럼 이용효율의 개선에 관한 연구" 16 : 819-827, 1991

6 ITU-R SM.1140, "Test produces for measuring aeronautical receiver characteristics used for determining compatibility between the sound broadcasting service in the band of about 87∼108MHz and the aeronautical services in the band 108∼118MHz"

7 ITU-R BS.412-9, "Planning standards for terrestrial FM sound broadcasting at VHF"

8 ITU-R SM.1268-1, "Method of measuring the maximum frequency deviation of FM broadcasting emissions at monitoring stations"

9 김병길, "FM In-Band On-Channel DAB 시스템의 성능개선방안 연구" 25 (25): 234-240, 2000

10 유형석, "FM In-Band DAB 신호와 FM방송신호의 상호간섭" 675-679, 1998

11 ITU-R BS.641, "Determination of radio frequency protection ratios for frequency modulated sound broadcasting"

12 ERA Technology(2007-0301) report, "Conducted RF measurements to quantity 10.7MHz IF interference to FM receivers"

13 F. Adduci, "A DSP-based digital IF AM/FM car-radio receiver" 201-204, 2003