正交调幅 meaning in Chinese

qam quadrative amplitude modulation
qam quadrature amplitude modulation
quadrature amplitude modulation （qam）

Multi - level quadrature amplitude modulation
多电平正交调幅
For the multipath delay spreading problem existing in the mobile communication systems , a parallel quadrature am data transmission system with a number of overlapping subchannels is investigated
摘要针对移动通信系统中存在的多径延时扩展问题，研究了一种具有很多相互重叠子信道的并行正交调幅数据传输系统。