Constant Envelope OFDM
Constant Envelope OFDM
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DOI：
10.1109/tcomm.2008.070043
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发表时间：
2008-08
影响因子：
8.3
通讯作者：
Steve C. Thompson;Ahsen U. Ahmed;J. Proakis;J. Zeidler;M. Geile
中科院分区：
文献类型：
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作者：
Steve C. Thompson;Ahsen U. Ahmed;J. Proakis;J. Zeidler;M. Geile
本文描述了一种变换技术，旨在解决与正交频分复用（OFDM）的峰均功率比（PAPR）的问题。恒定包络OFDM（CE-OFDM）通过相位调制将OFDM信号变换为设计用于高效功率放大的信号。在接收器处，在常规OFDM解调器之前应用逆变换-相位解调。分析了CE-OFDM在加性白色高斯噪声（AWGN）和衰落信道下的性能。CE-OFDM在密集多径环境中使用循环前缀传输和频域均衡器（FDE）可以获得良好的性能。通过计算机仿真和硬件实现，CE-OFDM与传统的OFDM相比具有明显的优势。
This paper describes a transformation technique aimed at solving the peak-to-average power ratio (PAPR) problem associated with OFDM (orthogonal frequency-division multiplexing). Constant envelope OFDM (CE-OFDM) transforms the OFDM signal, by way of phase modulation, to a signal designed for efficient power amplification. At the receiver, the inverse transformation - phase demodulation - is applied prior to the conventional OFDM demodulator. The performance of CE-OFDM is analyzed in additive white Gaussian noise (AWGN) and fading channels. CE-OFDM is shown to achieve good performance in dense multipath with the use of cyclic prefix transmission in conjunction with a frequency- domain equalizer (FDE). By way of computer simulation and hardware realization, CE-OFDM is shown to compare favorably to conventional OFDM.