2008年1月
A novel method of estimating the signal-to-interference ratio for one-cell-frequency-reuse OF/TDMA systems
IEICE Transactions on Communications
- ,
- ,
- ,
- 巻
- E91B
- 号
- 1
- 開始ページ
- 247
- 終了ページ
- 257
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/ietcom/e91-b.1.247
- 出版者・発行元
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
In one-cell-frequency-reuse Orthogonal Frequency Division Multiple Access based Time Division Multiple Access (OF/TDMA) systems, communication is blocked by interference from adjacent cells. The most promising solution would be an adaptive modulation and coding scheme that is controlled by estimating the signal-to-interference ratio (SIR). However, there has so far been no way to accurately estimate the SIR using the spreading codes for OF/TDMA systems, because of the asynchronous fast Fourier transform (FFT). In this paper, we propose a novel SIR estimation method that uses a spread pulse-wave symbol and carrier interferometry. Moreover, to introduce multi- input multi-output systems, we modify the proposed method by allocating a different spreading code to each cell. Computer simulation confirmed that the SIR is estimated accurately even if the FFT is asynchronous. On cell boundaries, the average estimation errors that are a ratio between accurate and estimated propagation characteristics are less than 2 dB.
- リンク情報
- ID情報
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- DOI : 10.1093/ietcom/e91-b.1.247
- ISSN : 0916-8516
- eISSN : 1745-1345
- Web of Science ID : WOS:000252617100030