重疊正交變換在正交頻分復(fù)用中的應(yīng)用
APPLYING LAPPED ORTHOGONAL TRANSFORM TO ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
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摘要: 本文將重疊正交變換(Lapped orthogonal transform)用于正交頻分復(fù)用(OFDM)系統(tǒng)的調(diào)制和解調(diào),提出了新的OFDM實(shí)現(xiàn)方案;并以一個(gè)多徑信道為例,把它與傳統(tǒng)的采用DFT的OFDM系統(tǒng)做了比較,指出新方案在無線通信中能有效地降低誤碼率。
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關(guān)鍵詞:
- 無線通信; 重疊正交變換; 正交頻分復(fù)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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