本文研究了自适应正交多载波频分复用（AOFDM）中根据估计出的信道特性选择调制方式的问题。
The problem of how to choose the constellation size based on the estimated channel qualities in AOFDM systems is addressed in this paper.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
正交耦合器是一个很好的方式，具有配电，高分离和高功率的能力。
Quadrature couplers are an excellent way for power distribution due to a high isolation and high power capability.
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。
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.
讲故事曾是人们真正交流的唯一方式。
采用分别粉磨再混合的方式，利用正交试验方法，研究了熟料、矿渣及粉煤灰的不同细度组合对复合硅酸盐水泥物理性能的影响。
The properties of the composite cement were studied by orthogonal test, which was prepared by the clinker, slag and fly ash with different fineness and mixed after separately grinding.
正交频分复用调制（OFDM）是一种信道利用率很高的调制方式，具有良好的抗衰落能力，可实现并行传送。
OFDM is a modulation method which was often used in the channels. It has better capability against the fading and can realized parallel transmission.
传输信号采用正交相移键控调制方式，以有效利用有限通信带宽。
Quadrature phase shift keying(QPSK) signaling is employed to make efficient use of the available bandwidth.
正交性的缺点可以通过减少系统架构一对一映射功能的方式得到改善。
Orthogonality of system architecture can be reduced by performing one-to-one functional mapping.
采用基于时域特征扩展和基于正交分解特征扩展两种方式建立过程神经元网络模型，利用电力负荷数据进行网络训练和负荷预测。
The two different ways based on the time-domain feature expansion and the orthogonal decomposition feature expansion are used to establish process neural networks model.
提出利用正交频分复用(OFDM)多载波调制方式代替单载波调制方式对信息进行处理。
The OFDM (Orthogonal Frequency Division Multiplexing) multi-carrier modulation is used to process messages instead of the traditional single carrier modulation.
分段结构磁化曲线拟合方式的提出，便于合理地进行正交可控消弧线圈的谐波分析。
The segmented magnetization curve fitting provides to the orthogonal controllable reactor's harmonic analysis reasonably and precisely.
梁德群教授提出了非正交多重调制技术（NMT），是一种多载波调制方式，它突破了正交性限制。
Professor Liang Dequn invented non-orthogonal multi-modulation technique (NMT), which is a multi-carrier modulation; it breaks through the orthogonal limitation.
研究了正交排布的碳纤维吸波复合材料的微波吸收特性，结果表明这种类似电路模拟材料的排布方式可使材料获得优异的吸波性能。
Microwave absorbing properties of circuit analog materials produced by carbon fiber were studied. The composites showed excellent results at the condition of this arrangement.
调制方式和多址接入的灵活性是正交频分复用（OFDM）技术的一大优点。
One of the advantages of OFDM is the flexibility concerning modulation and multiple access techniques.
在DVB系统中卫星传输采用QPSK，有线传输采用QAM方式，地面传输采用COFDM(编码正交频分复用)方式。
In DVB satellite transmission system used QPSK, using QAM cable transmission, terrestrial transmission using COFDM (coded orthogonal frequency division multiplexing) way.
提出了OFDM(正交频分复用)利用FFT(傅里叶变换)实时同步方式的方案，在多径环境下具有有良好的特性。
This paper proposes a scheme for temporary time locking by using FFT (fast Fourier transformer) in OFDM (orthogonal frequency division multiplexing). The OFDM has a good BER in multipath.
提出了OFDM(正交频分复用)利用FFT(傅里叶变换)实时同步方式的方案，在多径环境下具有有良好的特性。
This paper proposes a scheme for temporary time locking by using FFT (fast Fourier transformer) in OFDM (orthogonal frequency division multiplexing). The OFDM has a good BER in multipath.
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