| Presentation | 2013/8/22 Interference Control Method Between Primary and Secondary System Using load Modulation Takuma ITO, Naoki HONMA, Keisuke TERASAKI, Kentaro NISHIMORI, Yoshitaka TSUNEKAWA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Controlling interference from the secondary system (SS) to the receiver of the primary system (PS) is important issues when the SS uses the same frequency band in the area of television broadcast system. The reason includes that the SS cannot know the interference channel to the primary receiver (Rx), which does not have a transmitter. In this paper, we propose the interference control method between Rx and SS, where a load modulation scheme is introduced to Rx. In this method, the signal from the transmitter station is scattered by switching load impedance at Rx which does not emit radio waves. Also, SS estimates the scattered channel and calculates the interference suppression weights for transmitting, and controls interference by transmit beamforming at SS. Based on the simulation, it is found the Signal-to-Interference Ratio (SIR) with interference control is improved by up to 34.8 dB compared to that without interference control at a short distance, and it is confirmed that the proposed method using load modulation is effective in controlling interference between Rx and SS. Furthermore, we evaluate the Signal-to-Noise Ratio (SNR) and channel capacity at SS in the case of controlling transmit power of SS. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Load modulation / frequency sharing / interference control / channel capacity |
| Paper # | A・P2013-79 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2013/8/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Interference Control Method Between Primary and Secondary System Using load Modulation |
| Sub Title (in English) | |
| Keyword(1) | Load modulation |
| Keyword(2) | frequency sharing |
| Keyword(3) | interference control |
| Keyword(4) | channel capacity |
| 1st Author's Name | Takuma ITO |
| 1st Author's Affiliation | Graduate School of Engineering, Iwate University() |
| 2nd Author's Name | Naoki HONMA |
| 2nd Author's Affiliation | Graduate School of Engineering, Iwate University |
| 3rd Author's Name | Keisuke TERASAKI |
| 3rd Author's Affiliation | Graduate School of Engineering, Iwate University |
| 4th Author's Name | Kentaro NISHIMORI |
| 4th Author's Affiliation | Graduate School of Science and Technology, Niigata University |
| 5th Author's Name | Yoshitaka TSUNEKAWA |
| 5th Author's Affiliation | Graduate School of Engineering, Iwate University |
| Date | 2013/8/22 |
| Paper # | A・P2013-79 |
| Volume (vol) | vol.113 |
| Number (no) | 192 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |