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error code ratio
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  误码率
     The simulation result shows that compared with original V-BLAST algorithm,it has better BER performance: When an open loop system with 2 transmit and 2 receiver antennas is used,the channel has flat fading,and error code ratio is 10~(-2),resulting in 2 dB gain.
     仿真结果显示,与原V-BLAST算法相比具有更好的误码性能:在开环2发2收的情况下,信道为瑞利平坦慢衰落,采用QPSK(正交相移键控)调制,误码率为10-2时可获得2 dB的增益。
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     An experiment shows that under the same condition, it can make the error code ratio 1 ~2 powers lower than the old way. Based on the discussion, a new hardware structure for FSK demodulation is presented.
     实验表明:在相同条件下可使误码率下降1~2个数量级,在此基础上提出了一种新的FSK信号解调的硬件实现方法。
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     This paper inquires into the measurement and analysis of error code ratio for a facility digital optical fiber communication system.
     应用误码测试仪、光功率计等对简易数字光纤通信系统实验箱进行误码测试.分析结果得到:误码率随数字信号密度的增加而增大;
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     This paper presents a new algorithm used to demodulate PCM/DPSK telemetry signal by digital instantaneous frequency measurement This algorithm has high efficiency and low error code ratio It restrain Doppler frequency and can be realized by software conveniently The flow chart and result of the algorithm are also given
     根据 PCM/DPSK遥测信号的特点 ,介绍了一种通过数字信号瞬时测频实现 PCM/DPSK遥测信号的软件解调的方法。 该方法处理速度快、误码率低 ,能够有效地抑制多普勒频率对解调的影响 ,便于软件编程实现。
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     In this paper, based on analysis of electromagnetic environment in field transient test at 220 kV above level, a practical solution using optical communication technology to deal with interference is presented, and an effective encoding method to decreasing error code ratio and increasing bandwidth is offered.
     分析了≥ 2 2 0 k V电压现场暂态试验的电磁干扰 ,提出采用光通讯技术解决暂态试验抗干扰的实用方案 ,并给出了满足低误码率和高带宽要求的有效编码方式
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  error code ratio
Finally, the computer simulation shows that we can detect the carrier wave signal with SNR=-27 dB and the pseudo-random sequence under error code ratio 10-4 with SNR=-10 dB.
      


This paper introduces a Error-code ratio test system. It employs transfer message simultaneously recorded at the receive-and dispatch ends, and the method that error-code ratio and error-code distribution are found out by one to one bit compare. The system uses external synchroneous communication control method and adjusts internal synchroneous sign by external synehroneous sign. when laser-beam channel is instantaneously blocked and external sign disappears, the...

This paper introduces a Error-code ratio test system. It employs transfer message simultaneously recorded at the receive-and dispatch ends, and the method that error-code ratio and error-code distribution are found out by one to one bit compare. The system uses external synchroneous communication control method and adjusts internal synchroneous sign by external synehroneous sign. when laser-beam channel is instantaneously blocked and external sign disappears, the date will be received by internal synchroneous sign control so as to ensure that the receive end can accurately and steady record all transmitted messages in the transmission process. The system consists of two units of TP-801B single board computers, is available for five rates, of test precision up to 10~(-6) and storage message capacity of 22.5 k-characters. In addition to error-code ratio and distribution, the system provides all tested and error-code date. It has been successfully used in laser-beam riding system

本文所介绍的误码测试系统,采用收、发两端同时记录被传输信息,然后逐位比较求出误码率及误码分布的测试方法。系统采用外同步通讯控制方式,并由外同步信号整步内同步信号。当激光传输信道瞬间受阻而外同步信号消失时,由内同步信号控制对数据的接收,从而保证在整个信息传输过程中,接收端准确、可靠地记录全部被传输信息。该测试系统主要由两台TP-801B型微机组成,可适用于五种速率,具有10~(-6)的测试精度,存贮信息容量为22.5K字节,除提供误码率及误码分布外,还可提供全部被测数据及全部误码数据。该系统已成功地应用于激光制导系统的误码测试。

In this paper, a new method of FSK demodulation based on pattern recognition principle is simulated. Overcoming the influence of color noise and inpulse noise,this method is easier to realize than the traditional way-Frequency Sensitive Detector.An experiment shows that under the same condition, it can make the error code ratio 1 ~2 powers lower than the old way. Based on the discussion, a new hardware structure for FSK demodulation is presented.

根据FSK信号特点,模拟了一种基于模式识别的FSK信号解调新方法。此方法不仅比传统的鉴频器易于实现,而且能有效地克服信道有色噪声和脉冲干扰的影响。实验表明:在相同条件下可使误码率下降1~2个数量级,在此基础上提出了一种新的FSK信号解调的硬件实现方法。

The trellis coded modulation of digital TV system was discussed in this paper.The p erformances of different modulation schemes were analysed in the Gaussian chann el.The error code ratios were calculated.The optimum system was obtained at la st.

详细讨论了数字电视传输系统中的网格编码调制原理,针对不同的调制方案进行综合比较,并具体比较了各种调制方式在高斯白噪声信道中的抗误码性能,从而得出最佳的编码调制系统。

 
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