[1] Li Wei, Cheng Shixin, Chen Ming,. Different known guard intervals for single/multi-carrier transceiver [J]. Journal of Southeast University (English Edition), 2006, 22 (1): 11-15. [doi:10.3969/j.issn.1003-7985.2006.01.003]
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Different known guard intervals for single/multi-carrier transceiver(
)
已知可变符号构成的保护间隔在单载波/多载波通信系统中的应用
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 22
- Issue:
- 2006 1
- Page:
- 11-15
- Research Field:
- Information and Communication Engineering
- Publishing date:
- 2006-03-20
Info
- Title:
- Different known guard intervals for single/multi-carrier transceiver
- 已知可变符号构成的保护间隔在单载波/多载波通信系统中的应用
- Author(s):
- Li Wei; Cheng Shixin; Chen Ming
- National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
- Keywords:
- cyclic prefix; zero padding; fixed symbol padding; channel estimation
- PACS:
- TN911.5
- DOI:
- 10.3969/j.issn.1003-7985.2006.01.003
- Abstract:
- To enhance the bandwidth efficiency of the guard interval(GI)assisted wireless communication system, an attractive scheme is proposed, which combines the functions of pilots and the GI together, so that the pilot resource used for estimating channel state is saved.Based on the proposed different known guard intervals(DKGI), the time-domain channel estimation can be simply applied on the receiver side.After channel estimation, the receiver can employ the cyclic convolution restoring(CCR)function to reconstruct the cyclical convolution relationship between the signal and the channel, by which the receiver can also achieve good performance through the conventional 1-tap frequency domain equalization(FDE).
- 为了提高插入了保护间隔的无线通信系统的传输带宽利用效率, 提出了一种可以用作时域信道估计的特殊保护间隔实现方式.所提出的保护间隔信号由已知可变符号序列构成, 通过插入此种特殊的保护间隔, 接收机可以实现低复杂度的时域信道估计, 从而节省了原本传输导频信号的带宽, 也因此提高了系统的带宽利用率.为了在新的系统中继续使用单抽头的频域均衡器, 还给出了一种循环卷积恢复的方法用于重建信号和信道之间的循环卷积关系.仿真结果证明, 该方案能取得良好的性能.
References:
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[5] Wang Z D, Georgios B G, Pierre D.Cyclic prefixing or zero padding for wireless multicarrier transmissions [J].IEEE Transactions on Communications, 2002, 50(12):2136-2148.
[6] Petre F, Leus G, Deneire L, et al.Downlink frequency domain chip equalization for single-carrier block transmission DS-CDMA with known symbol padding [C]//Global Telecommunications Conference.Taipei, 2002: 453-457.
[7] Witschnig H, Mayer T, Springer A, et al.A different look on cyclic prefix for SC/FDE [C]//Personal, Indoor and Mobile Radio Communications.Lisbon, Portugal, 2002: 824-828.
[8] Witschnig H, Mayer T, Maurer L, et al.The advantages of a known sequence versus cyclic prefix in a SCFDE system [C]//Wireless Personal Multimedia Communications.Honolulu, Howaii, 2002: 1328-1332.
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Memo
- Memo:
- Biographies: Li Wei(1976—), male, graduate;Cheng Shixin(corres-ponding author), male, professor, sxcheng@seu.edu.cn.