重叠正交变换在正交频分复用中的应用
APPLYING LAPPED ORTHOGONAL TRANSFORM TO ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
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摘要: 本文将重叠正交变换(Lapped orthogonal transform)用于正交频分复用(OFDM)系统的调制和解调,提出了新的OFDM实现方案;并以一个多径信道为例,把它与传统的采用DFT的OFDM系统做了比较,指出新方案在无线通信中能有效地降低误码率。
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关键词:
- 无线通信; 重叠正交变换; 正交频分复用
Abstract: In this paper, lapped orthogonal transform(LOT) is applied to orthogonal frequency division multiplexing(OFDM) system for modulation and demodulation, and a new OFDM scheme is proposed. The performance comparison between the new scheme and traditional OFDM system using DFT is given. It shows the new scheme can decrease bit error rate(BER) efficiently in wireless communication. -
Yiyan Wu. Orthogonal frequency division multiplexing: A multi-carrier modulation scheme. IEEE Trans. on Consumer Electronics, 1995, CE-41(3): 392-399.[2]Floch B Le, et al. Digital sound broadcasting to mobile receivers. IEEE Trans. on Consumer Electronics, 1989, CE-35(3): 493-503.[3]Tzannes M A,et al. DMT systems, DWMT Systems and Digital Filter Banks. Proc. of ICC94, New Orleans, LA, USA: 1994, 311-315.[4]Rizos A D,et al. Comparison of DFT and Cosine Modulated Filter Banks in Multicarrier Modulation. Proc. of GLOBECOM94, San Rancisco, CA, USA: 1994, 687-691.[5]Vetterli M. Perfect Tranamultiplexers. Proc. of ICASSP86, Tokyo: 1986, 2567-2570.[6]Malvar H S. Signal Processing with Lapped Transform. Norwood, MA: Artech House, 1992[7]chapter 4. -
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