超单纯设计可用于构造重叠码、光正交码。
Super-simple designs are used in constructing optical orthogonal codes and superimposed codes.
研究了自对偶码与其删截得到的极大自正交码的等价性问题。
The equivalence of maximal self-orthogonal codes obtained from binary self-dual codes by truncating are discussed.
介绍了光正交码和二维光正交码的概念，并对其性能进行了讨论。
The concepts of optical orthogonal code and two-dimensional optical orthogonal code are introduced , and their performance is analysed .
提出一种适用于光正交码作为地址码的光码分多址多用户干扰并行干扰抑制系统。
The design of two-dimensional optical orthogonal codes encoder and decoder in optical code-division multiple access system;
然后提出了两种构造最佳自正交ue P码的方法，并给出了一类新的最佳自正交码。
Then, two constructing methods for optimal self-orthogonal UEP codes are proposed, and a new class of optimal self-orthogonal codes is also given.
该方案采用光正交码(OOC)作为收发器标识，根据接收器相关值选择发射器光束。
The scheme USES OOC as transceiver identification code, and selects transmitter beam according to receiver correlation value.
多相正交码是一种比二元码更优秀的地址码，而多相完全互补码具有更良好的相关特性。
Polyphase orthogonal codes are more excellent address-codes than duality codes, and polyphase complete complementary codes have even more fine correlation properties.
结果表明，此方法构造的光正交码码组具有较大的码容量和良好的相关特性，有一定的实用性。
Simulation results indicate that the optical orthogonal code block constructed by this method has fairly large code capacity and good relativity, and has a certain practical applicability.
本文推导非同步c D M A系统多址干扰表达式，计算正交码调制码组相关性对多址干扰的影响。
The performance representation indicating the effects of correlation of orthogonal code modulation sequences on MAI suppression in nonsynchronous CDMA system has been derived.
阐述了利用区组设计理论构造光正交码的方法，并分析了获取的地址码在系统应用中的信噪比和误码率。
Though the theory of blocks designing, enough amount of address code is provided firstly, and then applied performance in system was analyzed.
跟踪阶段，分析了同相码跟踪环的特点，然后根据其不足之处，选择同相正交码环来对码相位进行跟踪。
At tracking stage, after analysis the characteristics of the In-phase code tracking loop, the paper USES the In-phase and Quadrature code tracking loop to track the code phase.
该方案应用了码分多址的思想，采用光正交码（OOC）作为发射器的标识码，根据接收器相关值选择最佳发射器波束。
The scheme uses OOC as transceiver identification code and selects transmitter beam selection according to receiver correlation value.
但是这种正交性却被多径衰落信道破坏，产生了多码道干扰，严重影响了系统高速传输数据的性能。
The orthogonality, however, is impaired by multipath fading channels, thus causing multicode interference (MCI) and deteriorating the system's performance at high data transmission rates.
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.
基于这一概念，可以构造出适用于准同步cd MA (QS - CDMA)通信且性能优异的广义正交扩频码。
Based on this idea, a number of generalized orthogonal codes with excellent properties and suitable for the QS-CDMA communications can be constructed.
而以牺牲正交性和部分分集增益为代价来获得更高传输速率的非正交空时分组码又会使误码性能降低。
Whereas the non-orthogonal space-time block codes which obtain higher transmission rate at the cost of orthogonality and partial diversity gain may degrade the performance.
最后，在空时区块码不同的正交矩阵之下，展现出我们的模拟结果。
Finally, we present our simulation results under different encoding scheme of the space time block code.
针对这种情况，本文给出了一种空时网格码的正交设计方法。 这种方法可以用来构造大天线数目的码字，从而避免了繁琐的码字搜索过程。
So we put forward an orthogonal method which can be used to design the STTC with large number of transmit antennas and avoid the complicated search for the code.
目前，一种普遍的解决方法是将空时码与正交频分复用（OFDM）相结合，但需要假定信道变化缓慢，从而有足够的时间通过发送训练序列来进行信道估计。
Now, a general solution is that combining STC with OFDM, but it is supposed that the channel changes slowly, so there is enough time to transmit the training sequence for channel estimation.
但由于空时分组码受正交条件限制，传输效率得不到提高，而BLAST系统存在差错传播制约着误码率的下降。
But the data efficiency of STBC is restricted to orthogonal transmission and the bit error rate of BLAST is high due to the error propagation.
最佳多用户检测器是非线性检测器，特征码不完全正交时，线性检测器很难逼近最佳检测器。
Due to non orthogonality of signature sequence, performance of linear detector is much less than that of the optimum detector that is nonlinear.
本文提出了一种新的四天线准正交空时分组码的通用设计方法。
In this paper, a novel general design method of quasi-orthogonal space-time block codes for four antennae is presented.
根据不同的传输需求，正交线性空时弥散码的形式还可以灵活变化。
Orthogonal linear dispersive space time code can also be used as an adaptive one for different application requirement.
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.
分析一种可正交扩散卷积码的性能和编译码方法。
The performance, the encoding and decoding method of a orthogonalizable diffuse convolution code are analyzed.
本文通过MATLAB编程实现正交频分复用（OFDM）的系统仿真，系统采用卷积码和交织码级连的差错控制编码。
This test realized emulational system of OFDM through MATLAB programming, adopted error control coding of concatenation of convolutional codes and interlaced codes.
它所发送的信号是由一组正交的正弦信号作为副载波，用码元周期为T的不归零方波作为基带码型调制而成的。
The transmitted signals which were modulated is a group of orthogonal sine signals as subcarrier and non-regular zero square waves that the code elements period is t as baseband coded formats.
首先研究基本的发射机，包括卷积编码、交织、扰码、沃尔什调制、正交扩频以及基带滤波。
Firstly the basic transmitter, including convolutional encoding, interleaving, scrambling, Walsh modulation, quadrature spreading and baseband filtering was studied.
利用这些自对偶码及构造出的具有较好对偶距离的自正交子码构造出了码链，并且导出相应的L-链。
The series of the self-dual and self-orthogonal chains are constructed by these matrixes and the subcodes' L-chains with maximal dual distance are deduced.
提出了一种适用于TDD上行链路的基于预均衡和正交循环码的M元MC-CDMA系统。
A novel M-ary MC-CDMA system in uplink TDD mode is proposed based on orthogonal cyclic codes and pre-equalization.
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