| 講演抄録／キーワード |
| 講演名 |
2016-02-18 16:20
Compressed Sensing Based Channel Estimation in ISDB-T System without Cyclic Prefix
○Rian Ferdian・Yafei Hou・Minoru Okada（NAIST） |
| 抄録 |
（和） |
Integrated Services Digital Broadcasting Terrestrial (ISDB-T) is using orthogonal frequency division and multiplexing (OFDM) for its core modulation. Every OFDM transmission requires Cyclic Prefix (CP) in order to mitigate the inter-symbol interference (ISI) and inter-block interference (IBI). The used of CP also can ease the equalization computation as the channel matrix become circulant and toeplitz. However, CP will create longer OFDM symbol. Moreover, the length of CP will depends on the coverage radius of broadcasting, since the longer CP can accommodate the transmission delay. Recently, a wireless communication scheme without CP by using chained turbo of equalization (CHATUE) technique was proposed. Application of CHATUE in ISDB-T can create better efficiency in spectrum and wider broadcasting coverage area. But, implementation of CHATUE algorithm also requires high computational complexity due to the non-circulant structure of its interference matrices. In this paper, we propose a low-complexity implementation of CHATUE in OFDM system using the masking matrix technique to keep the interference matrices circulant and toeplitz. In addition, we also provide a simulation result to show the new maximum delay spread allowed in this ISDB-T system without CP. |
| （英） |
Integrated Services Digital Broadcasting Terrestrial (ISDB-T) is using orthogonal frequency division and multiplexing (OFDM) for its core modulation. Every OFDM transmission requires Cyclic Prefix (CP) in order to mitigate the inter-symbol interference (ISI) and inter-block interference (IBI). The used of CP also can ease the equalization computation as the channel matrix become circulant and toeplitz. However, CP will create longer OFDM symbol. Moreover, the length of CP will depends on the coverage radius of broadcasting, since the longer CP can accommodate the transmission delay. Recently, a wireless communication scheme without CP by using chained turbo of equalization (CHATUE) technique was proposed. Application of CHATUE in ISDB-T can create better efficiency in spectrum and wider broadcasting coverage area. But, implementation of CHATUE algorithm also requires high computational complexity due to the non-circulant structure of its interference matrices. In this paper, we propose a low-complexity implementation of CHATUE in OFDM system using the masking matrix technique to keep the interference matrices circulant and toeplitz. In addition, we also provide a simulation result to show the new maximum delay spread allowed in this ISDB-T system without CP. |
| キーワード |
（和） |
Turbo Equalization / Compressed Sensing / Spectrum Efficient / / / / / |
| （英） |
Turbo Equalization / Compressed Sensing / Spectrum Efficient / / / / / |
| 文献情報 |
映情学技報, vol. 40, no. 4, BCT2016-24, pp. 29-32, 2016年2月. |
| 資料番号 |
BCT2016-24 |
| 発行日 |
2016-02-11 (BCT) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
| PDFダウンロード |
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