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单位码元
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  “单位码元”译为未确定词的双语例句
     For the chaotic sample function,a set of orthogonal bases can be used to produce the quadrature signal of the chaotic carrier in the frequency or time domain. In the receiver,the reference signal and its quadrature component are directly correlated with the information-bearing part without FM demodulation.
     针对混沌样值函数构造一组正交基,采用频域或时域方法得到混沌载波的正交信号,接收时直接将参考信号及其正交信号分两路与载信信号进行相关处理,不需FM解调,这就使单位码元符号所表示的信息增加了一倍.
短句来源
     In the FM-QCSK(Frequency Modulated Quadrature Chaos Shift Keying) communication system,frequency modulation of the continuous-time chaotic signal makes it possible to generate an inherent wideband signal with constant energy per bit.
     在调频-四相混沌键控(FM-QCSK)混沌数字通信系统中,对时域连续混沌信号进行频率调制,使单位码元具有近似相等的比特能量;
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  相似匹配句对
     Research in the Huffman coding when 0、1 with different time
     Huffman码在码元时间单位不同时的最优性研究
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     Photosynthetic unit
     光合单位
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     On Joint Offense of Units
     论单位共同犯罪
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     The Cycle of Code on Fp[x]/(f(x ))
     F_p[x]/(f(x))上码元的周期性
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  unit element
Novel realization of unit element wave switched capacitor filter
      
In this paper, some novel SC-adaptor circuits are presented to realize the unit element wave switched capacitor filter using two-phase clock signals.
      
As an example, a 5th order unit element low-pass filter is given.
      
One can analyze instantons taking as a starting point the algebra of smooth functions vanishing at infinity, but it is convenient to add a unit element to this algebra (this corresponds to a transition to a sphere at the level of topology).
      
Classical composition algebras, with a unit element, are well-known and can be obtained by means of the Cayley-Dickson doubling process.
      
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In the FM-QCSK(Frequency Modulated Quadrature Chaos Shift Keying) communication system,frequency modulation of the continuous-time chaotic signal makes it possible to generate an inherent wideband signal with constant energy per bit.For the chaotic sample function,a set of orthogonal bases can be used to produce the quadrature signal of the chaotic carrier in the frequency or time domain.In the receiver,the reference signal and its quadrature component are directly correlated with the information-bearing part...

In the FM-QCSK(Frequency Modulated Quadrature Chaos Shift Keying) communication system,frequency modulation of the continuous-time chaotic signal makes it possible to generate an inherent wideband signal with constant energy per bit.For the chaotic sample function,a set of orthogonal bases can be used to produce the quadrature signal of the chaotic carrier in the frequency or time domain.In the receiver,the reference signal and its quadrature component are directly correlated with the information-bearing part without FM demodulation.In this way,a symbol can once represent 2-bit information to achieve the higher rate of transmission.Simulation results show that the BER performance of FM-QCSK is close to that of FM-DCSK in the AWGN channel,and that compared with traditional periodical carrier modulation,this scheme is robust to the frequency selective fading in the multipath channel.

在调频-四相混沌键控(FM-QCSK)混沌数字通信系统中,对时域连续混沌信号进行频率调制,使单位码元具有近似相等的比特能量;针对混沌样值函数构造一组正交基,采用频域或时域方法得到混沌载波的正交信号,接收时直接将参考信号及其正交信号分两路与载信信号进行相关处理,不需FM解调,这就使单位码元符号所表示的信息增加了一倍.计算机仿真结果表明,在AWGN信道下,FM-QCSK的误码率性能接近于FM-DCSK;在多径信道下,FM-QCSK方法在BER为10-4时,Eb/N0控制在20 dB,其性能好于传统的周期性载波调制系统.

 
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