数字调制技术是BPL时码发播和自主授时的基础。
Digital modulation technology is the foundation of BPL time code broadcast and independent time service.
给出了信息帧比特安排、时码格式、帧结构的详细结果。
The details of the message bit assignment and time code format and frame structures are given.
该曲线的斜率最大点即为低频时码接收机的秒定时参考点。
In this curve, the point which had the largest inclined rate was a timing reference point of low frequency time-code receiver.
在低信噪比情况下，提出了一种基于循环对角码的改进的酉空时码设计。
Based on cyclic diagonal codes, an improved design of unitary space-time codes (USTC) at low SNR is proposed.
在介绍空时码的MIMO信息论基础上，系统地对三类空时码进行了分析比较。
In this paper, after introducing MIMO information theory about sp ace time code, three kinds of space time code are compared and analyzed systematically.
通过对改进素数码的不同脉冲位置赋予不同的频率，提出了一种新的跳频扩时码。
A novel frequency time spreading code by designating the different frequencies to the different mark positions of the modified prime code is proposed.
伪随机序列的产生是实现BPC低频时码发播台扩展频谱技术升级的一个重要环节。
The generating of pseudo random sequence is one of the key subjects to realize the spread spectrum technique upgrade for BPC low frequency time code radio station.
另外，证明了空时码的几何一致性并使用该特性大大地减少了空时码搜索的复杂度。
Furthermore, geometrical uniformity of STC is utilized to reduce the complexity of code search greatly.
鉴于酉空时码的独特结构，在差错概率公式中可以很容易地分析衰落相关系数矩阵带来的影响。
According to the special structure of unitary code, it is very simple to analyze the effect of fading correlation from the equation of PWEP.
该方式给每个用户分配不同的伪随机跳时码，根据跳时码参考信号和数据信号进行相同量的跳时。
It assigns different PN time-hopping codes to different users. The signals for reference and symbol in a frame have the same time-hopping value.
针对酉空时码最大似然检测复杂度高的问题，提出了一种酉空时星座的设计及低复杂度译码方法。
A decoding algorithm based on the tree-structured constellation design was presented in order to reduce the decoding complexity of unitary space-time codes.
对准静态衰落信道、快衰落信道以及介于两者之间的时变衰落信道下的空时码设计准则进行了研究。
The design criteria of space-time code (STC) for quasi-static fading channels, fast fading channels, and the time-varying fading channels are investigated.
随着码率的不断增加，酉空时码群中的各个星座点之间的乘积距离会变得越来越小，从而导致性能恶化。
With the increase of the code rate, the production distance between the constellation of the unitary group code decreases rapidly and deteriorates the performance of the system.
超宽带冲激无线电技术是近年来新兴的通信技术，其主要核心技术是采用了冲激脉冲技术和跳时码调制。
The UWB impulse radio technology is a new kind of communication method these years, in which the swash impulse and time-hopping code modulation techniques are mainly applied.
然后对网格空时码（STTC）和分组空时码（STBC）的编译码原理、特点和性能进行了全面的分析；
Then the encoding and decoding theories, features and performances of STBC and STTC are detailed in all aspects.
在此基础上，讨论了幅度系数比对幅度相位双差分空时码的影响，并给出了一种最佳的幅度系数选择方案。
Based on the above, the impact of amplitude coefficient ratio on amplitude-phase Double Differential Space-Time Codes is discussed, and an optimal selection scheme in amplitude coefficient is given.
作者提出低频时码信号的正交扫描解调技术，从理论上分析了正交扫描原理和实现方法，并进行了仿真测试；
The orthogonal sampling demodulating technique for low frequency time-code signal is introduced. Based on the theoretical analysis about its principle and implement method, The simulation is tested.
空时码的提出为解决无线通信系统中的传输速率问题提供了一条新思路，目前已经成为通信研究的一个热点。
Space-time code indicates a new idea of providing high transmission rate in wireless communication systems and has recently received considerable attention.
这是关于“中国大陆江苏省淮安市涟水县时码办事处嵇码村”邮政编码的网页，以及详细地区信息和在线地图。
This is a page about postal code of "Shi Ma Ban Shi Chu Ji Ma Cun , Lianshui County, Huai'an City, Jiangsu Province, China", with area information and online map.
考察了空时码的首事件差错概率，并基于首事件差错概率提出一种新的用于时变衰落信道的空时码混合设计准则。
The first-event error probability of STC is evaluated, and a new hybrid design criterion of space-time code for time-varying fading channels is proposed based on that probability.
差分酉空时码不需要任何信道状态信息，在通信终端处于高速移动环境下的快变衰落信道中仍能保持较好的性能。
Differential unitary space-time code(DUSTC) keeps good performance in rapidly fading channels when neither the transmitter nor the receiver knows the channel state information.
介绍了空时码在频率非选择性慢衰落信道下各种设计准则的推导过程，并对几种现有空时码进行了性能分析和比较。
This paper analyzed the impact of fading correlation on the noncoherent unitary space-time code, deduced the pair-wise error probability(PWEP) and Chernoff bound under fading correlation.
本文将信号处理中的子空间方法同分层空时码的编码结构相结合，提出了一种垂直分层空时编码，实现了无需训练序列的信道估计。
In this paper, by combining the subspace method with layered space-time codes, we propose a vertical layered space-time code and accomplish the channel estimation without the training symbols.
针对多输入多输出系统中现有的线性分散(LD)空时码编、解码复杂度高的问题，提出了一类正交线性分散(old)空时编码。
Focusing on the problem that existing linear dispersion (LD) space-time codes have a high encoding and decoding complexity, a type of orthogonal linear dispersion (OLD) space-time codes is proposed.
利用分组干扰抑制的方法，通过合理地设计空时码的发射码矩阵和对阵列天线进行了子阵划分，提出了一种新的混合型的空时编码方法。
A new hybrid space-time coding approach is presented in this paper. The properly designed code matrix and group interference suppression method are used in this approach.
利用分组干扰抑制的方法，通过合理地设计空时码的发射码矩阵和对阵列天线进行了子阵划分，提出了一种新的混合型的空时编码方法。
A new hybrid space-time coding approach is presented in this paper. The properly designed code matrix and group interference suppression method are used in this approach.
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