| Presentation | 2014-10-30 Adaptive Per-antenna Interference Cancellation for DS-CDMA DAN in A Non-uniform User-distribution(Poster session) Shohei INOSHITA, Hiroyuki MIYAZAKI, Fumiyuki ADACHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Distributed antenna network (DAN), in which many antennas are spatially distributed, can mitigate the negative impact of not only the fading but also propagation path loss and shadowing loss, and accordingly, achieves a good transmission performance in entire the service area. Beside, the combination of direct-sequence code division multiple access (DS-CDMA) using quasi-orthogonal code and interference cancellation can accommodate many users in a cell while alleviating complex channel allocation problem. Recently, we proposed the per-antenna interference cancellation (PAIC) for DS-CDMA DAN in order to achieve a good uplink capacity while reducing computational complexity. In the conventional PAIC, the numbers of users to be cancelled in antenna whose coverage area has many and few users are insufficient and excessive respectively, because the number of users to be cancelled is the same among all distributed antennas. In this paper, we propose the adaptive per-antenna interference cancellation (APAIC) to change the number of users to be cancelled according to the user distribution. Distributed antennas transmit their own pilot signals. Each user selects the received antennas in the descending order of the instantaneous received pilot signal power and reports the user index and the rank of selected antenna to each of selected antennas. In APAIC, each antenna has a user table containing the indices of users who have selected that antenna and the ranks of that antenna. Each antenna looks up the user table and cancels the users who are selecting it higher than the prescribed ranking threshold. We show by computer simulation that our proposed APAIC achieves a higher uplink capacity than the conventional PAIC in an environment of non-uniform user distribution. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DAN / DS-CDMA / uplink capacity / interference cancellation |
| Paper # | SR2014-60 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2014/10/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Smart Radio(SR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Adaptive Per-antenna Interference Cancellation for DS-CDMA DAN in A Non-uniform User-distribution(Poster session) |
| Sub Title (in English) | |
| Keyword(1) | DAN |
| Keyword(2) | DS-CDMA |
| Keyword(3) | uplink capacity |
| Keyword(4) | interference cancellation |
| 1st Author's Name | Shohei INOSHITA |
| 1st Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Hiroyuki MIYAZAKI |
| 2nd Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University |
| 3rd Author's Name | Fumiyuki ADACHI |
| 3rd Author's Affiliation | Dept. of Communications Engineering, Graduate School of Engineering, Tohoku University |
| Date | 2014-10-30 |
| Paper # | SR2014-60 |
| Volume (vol) | vol.114 |
| Number (no) | 284 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |