正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)技术以其频谱利用率高和抗频率选择性衰落强等优点，成为下一代移动通信中最具竞争力的关键技术之一-OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology for its high spectrum efficiency and strong anti-frequency selective fading, etc.