| 摘要 |
PURPOSE: A system and a method for sector division transmission are provided to efficiently transmit video signals and data signals in an MMDS(Multi-channel Multi-point Distribution Service) by minimizing the frequency interference between video signals and data signals. CONSTITUTION: A sector division transmission system comprises a video transmission device, data transmission devices outputting frequency channels after dividing the digital data by specific frequency bands, a power distributing device outputting the signals output from the video transmission device after dividing into horizontal and vertical patterns, video transmission horizontal and vertical antennas(200,220) emitting the video signals output from the power distributing device, data transmission horizontal antennas(100,140) emitting horizontal data signals by receiving the data signals output from the data transmission device, and data transmission vertical antennas(120,160) emitting vertical data signals by receiving the data signals output from the data transmission device. According to sector division in an MMDS frequency band, frequency use is maximized. Therefore, broadcasting channel operation and service areas are maximized.
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