The empirical mode frequency decomposition is orthogonal and possesses good behaviour.
经验模态频率分解是正交分解，有很好的性质和频率意义。
2
The communication mode of using shift-sequences of multiphase orthogonal sequences is brought up and the method for synchronization of sequence in receiver is presented.
提出采用多相正交序列的移位序列作为扩频序列的通信方式，并给出接收端序列同步的实现方法。
3
A novel M-ary MC-CDMA system in uplink TDD mode is proposed based on orthogonal cyclic codes and pre-equalization.