国产bbaaaaa片,成年美女黄网站色视频免费,成年黄大片,а天堂中文最新一区二区三区,成人精品视频一区二区三区尤物

首頁> 中文期刊> 《中國海洋工程：英文版》 >CSI Feedback-based CS for Underwater Acoustic Adaptive Modulation OFDM System with Channel Prediction

CSI Feedback-based CS for Underwater Acoustic Adaptive Modulation OFDM System with Channel Prediction

     
  • 摘要
  • 著錄項
  • 相關主題

摘要

In this paper, we investigate the performance of adaptive modulation(AM) orthogonal frequency division multiplexing(OFDM) system in underwater acoustic(UWA) communications. The aim is to solve the problem of large feedback overhead for channel state information(CSI) in every subcarrier. A novel CSI feedback scheme is proposed based on the theory of compressed sensing(CS). We propose a feedback from the receiver that only feedback the sparse channel parameters. Additionally, prediction of the channel state is proposed every several symbols to realize the AM in practice. We describe a linear channel prediction algorithm which is used in adaptive transmission. This system has been tested in the real underwater acoustic channel. The linear channel prediction makes the AM transmission techniques more feasible for acoustic channel communications. The simulation and experiment show that significant improvements can be obtained both in bit error rate(BER) and throughput in the AM scheme compared with the fixed Quadrature Phase Shift Keying(QPSK) modulation scheme. Moreover, the performance with standard CS outperforms the Discrete Cosine Transform(DCT) method.

著錄項

獲取原文

客服郵箱：kefu@zhangqiaokeyan.com

京公網(wǎng)安備：11010802029741號 ICP備案號：京ICP備15016152號-6 六維聯(lián)合信息科技 (北京) 有限公司?版權所有

  • 客服微信

  • 服務號