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多频带UWB-OFDM系统是高速、短距离WPANs物理层的理想接入方案,具有广阔的应用前景。研究了在AWGN和IEEE802.15.3aUWB多径信道模型下,基于两种不同调制技术的多频带UWB-OFDM系统的误码性能,分析了多频带UWB-OFDM系统中插入保护间隔对其系统性能的影响。仿真结果表明:基于QPSK调制技术的UWB-OFDM系统较基于16QAM的系统有较好的误码性能。
Multi-band UWB-OFDM system is an ideal access scheme for high-speed, short-range WPANs physical layer and has broad application prospects. The BER performance of multi-band UWB-OFDM system based on two different modulation techniques is studied under AWGN and IEEE802.15.3aUWB multipath channel models. The performance of the multi-band UWB-OFDM system with inserted guard intervals is analyzed influences. The simulation results show that UWB-OFDM system based on QPSK modulation technology has better error performance than 16QAM based system.