Real-time OFDM or Nyquist pulse generation--which performs better with limited resources?
Real-time OFDM or Nyquist pulse generation--which performs better with limited resources?
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DOI：
10.1364/oe.20.00b543
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发表时间：
2012-12
期刊：
影响因子：
3.8
通讯作者：
R. Schmogrow;R. Bouziane;M. Meyer;Peter Milder;P. Schindler;R. Killey;P. Bayvel;C. Koos;W. Freude;J. Leuthold
中科院分区：
文献类型：
--
作者：
R. Schmogrow;R. Bouziane;M. Meyer;Peter Milder;P. Schindler;R. Killey;P. Bayvel;C. Koos;W. Freude;J. Leuthold
我们研究了数字产生的OFDM和正弦形奈奎斯特脉冲的性能和DSP资源要求。这两种多路复用技术是令人感兴趣的，因为它们提供最高的频谱效率。比较的目的是确定哪种技术在最先进的FPGA的有限处理能力下表现更好。结果表明，一种新的奈奎斯特脉冲整形技术，基于查找表需要更低的资源计数比等效的IFFT为基础的OFDM信号生成，同时实现类似的性能与低通道间的保护带在超密集WDM。我们的研究结果是基于资源评估的选择DSP实现方面的模拟和实验验证。实验是用实时软件定义的发射机使用一个或三个光载波进行的。
We investigate the performance and DSP resource requirements of digitally generated OFDM and sinc-shaped Nyquist pulses. The two multiplexing techniques are of interest as they offer highest spectral efficiency. The comparison aims at determining which technology performs better with limited processing capacities of state-of-the-art FPGAs. It is shown that a novel Nyquist pulse shaping technique, based on look-up tables requires lower resource count than equivalent IFFT-based OFDM signal generation while achieving similar performance with low inter-channel guard-bands in ultra-dense WDM. Our findings are based on a resource assessment of selected DSP implementations in terms of both simulations and experimental validations. The experiments were performed with real-time software-defined transmitters using a single or three optical carriers.