quadrature frequency hopping

The demodulation techique for reader is selected,and the research focuses mainly on zero-IF quadrature demodulator,gives its solution.

在对UHF RFID读写器工作原理进行分析的基础上,介绍一种工作在UHF频段下的读写器的射频接口电路,并确定读写器的解调方式,重点对正交零中频解调方式进行研究,并给出读写器的实现方案。

In this paper, the cross-ambiguity of OFD-LFM (orthogonal frequency division linear frequency modulation)signals is analyzed.

该文分析了正交频分线性调频(OFD-LFM)信号的互模糊函数,对互相关峰值旁瓣电平出现的位置及幅度大小进行了分析,给出了最小化OFD-LFM信号间互相关影响的参数之间的关系。

Some New Results on Orthogonal Frequency Squares;

正交频率方的组合构造和新的下界表

Target full polarization instantaneous measurement based on orthogonal frequency division

基于正交频率分集的目标全极化瞬时测量方法

Research on the Estimation of Frequency Offset in OFDM System;

正交频分复用系统频率偏移估计的研究

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.

The Research on Peak to Average Power Ratio in Orthogonal Frequency Division Multiplexing Systems;

正交频分复用系统中降低峰均功率比的研究

Study and Realization of Multirate M-ary Orthogonal Spread Spectrum System;

可变速率的多进制正交扩频系统研究与实现

Design of Active Orthogonal Vector Detection System in Frequency Domain

频率域有源正交矢量型检测系统的设计

Analysis Algorithm to Frequency Rate of LFM Signal Based on Biorthogonal Fourier Transform

LFM信号调频斜率的双正交Fourier变换分析算法

Power System Frequency Tracking Algorithms Based on Improved Biorthogonal Filter Banks

改进双正交滤波器组的电网频率跟踪算法

Power allocation of cognitive orthogonal frequency division multiplexing system

认知正交频分复用系统的功率分配研究

AC Alternating Current( AC) is electric current that alternates between a positive maximum value and a negative maximum value at a characteristic frequency, usually50 or60 cycles per second( Hertz).

交流交流是指电流在正负最大值之间以特定的频率变动，通常频率为50或60赫兹。

Eventually, they discovered that the alternator in the car was operating at a frequency which was a multiple of that of the radio wave being used for communication.

最终,他们发现车上的交流电机运行的频率正好是和交流电波频率的整倍数.

The demodulation algorithm for IQ components is given under condition that the carrier is recovered.

在载波频率已恢复的情况下给出了IQ正交分量的解调算法。

The Application of Orthogonal Frequency Division Multiplex in PLC and the Research Its Peak-to-Average Power Ratio;

正交频分复用技术在PLC中的应用及其峰值平均功率比研究

The Theory of Generalized Orthogonal Spreading Code and Its Applications in Multi-rate QS-CDMA Systems;

广义正交扩频序列理论及其在多速率QS-CDMA系统中的应用研究

Implementation of Quadrature Demodulation and Complex Self-correlation Algorithm for Frequency Estimation on Ocean Current Measurement

正交解调及复自相关频率估计在海流测量中的应用

Time-Reversal Orthogonal Space-Time Block Coding Design for Frequency-Selective Fading Channels

频率选择性衰落信道中的时间反转正交空时分组码设计

A Low Complexity Decoding Algorithm for Orthogonal Space Time Block Codes in Frequency Selective Fading Channels

频率选择性衰落信道中一种低复杂度的正交空时分组码译码算法