The Multiband Orthogonal Frequency Division Multiplexing ( MB-OFDM) system is a key technique to achieve a high-speed data transmission for the Wireless Personal Area Networks (WPAN).To meet the required transmission mode for MB-OFDM system, Quadrature Phase Shift Keying , Dual Carrier Modulation , Dual Carrier 32 QAM modulation and demodulation tech-niques are proposed in this paper .In multipath channel environment transmission test , multi-mode modulation and demodulation can improve the high-speed data transmission in MB-OFDM system.%多频带正交频分复用（MB－OFDM）系统是实现高速无线个人局域网高速数据传输的关键技术。按照MB－OFDM系统不同的传输模式要求，文章提出四相相移键控、双载波、双载波32正交振幅三种调制及解调技术。在多径信道环境下的传输测试证明，多模式调制解调技术能提高MB－OFDM系统的高速数据传输性能。
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