| High Data Rate OFDM System with Simplified DAPSK Demodulation |
| |
| 引用本文： | LIU Kai-ming,WANG Wen-bo,LIU Yuan-an Center for Wireless Communications,Beijing University of Posts and Telecommunications,Beijing 100876,P.R.China. High Data Rate OFDM System with Simplified DAPSK Demodulation[J]. 中国邮电高校学报(英文版), 2005, 12(2) |
| |
| 作者姓名： | LIU Kai-ming WANG Wen-bo LIU Yuan-an Center for Wireless Communications Beijing University of Posts and Telecommunications Beijing 100876 P.R.China |
| |
| 作者单位： | LIU Kai-ming，WANG Wen-bo，LIU Yuan-an Center for Wireless Communications，Beijing University of Posts and Telecommunications，Beijing 100876，P.R.China |
| |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 1IntroductionIn future wireless communication systems beyond3G,high data rate more than 2 Mbps is desired. TheInterSymbol Interference (ISI) resulted fromthe fre-quency-selective fading channel will be a crucial problemwhich may degrade system performance severely.OFDMis an effective technique to combat this adversecharacteristic[1 ~3],and has beenadoptedfor manystan-dards , such as DAB, DTVB, Hiperlan/2 and IEEE802 .11 ,etc .Spectrally efficient modulation schemes have also ab-sorbe…
|
High Data Rate OFDM System with Simplified DAPSK Demodulation |
| |
| LIU Kai-ming,WANG Wen-bo,LIU Yuan-an. High Data Rate OFDM System with Simplified DAPSK Demodulation[J]. The Journal of China Universities of Posts and Telecommunications, 2005, 12(2) |
| |
| Authors: | LIU Kai-ming WANG Wen-bo LIU Yuan-an |
| |
| Abstract: | In this paper, a simplified differential amplitude demodulation scheme for high-level Differential Amplitude and Phase Shift Keying (DAPSK) techniqus is proposed, which requires fewer thresholds for demodulation and thus has lower complexity. The performance of the Orthogonal Frequency Division Multiplexing (OFDM) system combined with the simplified DAPSK scheme is investigated over frequency-selective fading channels, then. Compared with coherent QAM-OFDM system, DAPSK-OFDM system has much lower complexity since channel estimation and equalization are unnecessary. Further more, under the condition of the same data rate, DAPSK-OFDM can achieve the performance close to or even better than that of QAM-OFDM system which adopts pilot symbols for channel estimation, by employing the concatenated code and utilizing the additional redundancy for outer coding at high Signal-to-Noise Ratios (SNRs). |
| |
| Keywords: | DAPSK OFDM flat fading frequency-selective fading |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
