系统干扰包括多径干扰、小区内多用户干扰和小区间的干扰。
Here includes multi-path interference, multi-user interference of intra-cell and inter-cell interference.
进一步考虑在存在多用户干扰条件下，该系统性能随用户数的增加而下降。
So the scheme employing PPM is preferred and we further find when MUI(Multi User Interference) is considered the performance degrades when the number of users increases.
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;
理论分析证明，虚拟小区可以降低用户发射功率，从而减少多用户干扰，提高系统容量。
The results show DVCN can reduce users' transmit power, decrease multi-user interference and improve the reverse link capacity.
提出了一种新的基于子空间跟踪的自适应阵ds - CD MA多用户干扰抑制接收机。
It brings up a new DS-CDMA multiuser interference suppression receiver with a subspace tracking adaptive array.
数值计算和计算机仿真结果表明了高斯噪声、多用户干扰、多径衰落以及分集接收等对系统性能的影响。
Numerical and simulation results show that the Gaussian noises, multi user interferences, multipath fading and diversity receiving all have impact on the system performance.
分析结果表明，在系统中引入多用户检测技术可以抑制多用户干扰带来的影响，有效提高系统用户容量。
The result of simulation demonstrates that the introduction of the technology of multi-user detection makes address code used effectively.
接收端采用串行干扰抵消的方法去除或抑制很严重的多用户干扰，该方法实现简单，适合瑞利衰落信道。
In the receiver, successive interference cancellation is employed to remove or suppress sever multiuser interference, and this detector is easy to implement and apt to Rayleigh fading channel.
该智能天线在每个阵元输出带有时域均衡器，可以在多径环境下有效消除多径干扰和多用户干扰，提高信噪比。
Tore duce effective the multipath disturbance and multi-user interference and improve the SNR, time-domain equalizer is employed at the output of each array element of smart antenna.
在系统中存在多用户干扰及接收机散粒噪声的情况下，推导出该系统误码率上限，并对该系统特性与无光硬件限幅器的光PPM- CDMA通信系统特性作了比较。
The performance of the system is evaluated when considering the effects of both multi user interference and photo detector shot noise. An upper bound on the bit error rate is derived.
数值结果表明，由于使用多用户联合检测技术抑制多址干扰，随着激活用户数的增加，小区的有效覆盖范围几乎保持不变；
Results show that cell coverage almost remains constant as the number of active users in the cell increases due to the usage of joint detection technology to suppress multiple access interference.
非线性多用户检测包括干扰消除和神经网络检测技术。
Non-linear Multi-user detection technology including interference cancellation and neural network detection technology.
将该方法用于多用户检测问题的实验结果表明，采用这种混合算法训练的RBF网络结构精简，具有很好的抗多址干扰的性能。
The application of the algorithm in multiuser detection problems demonstrates that the RBF network trained with the algorithm is concise in structure and has good anti-MAI performance.
在DS - CD ma系统中，联合译码的迭代多用户检测是克服多址干扰增加系统容量的有效方法。
It has been proved that iterative multiuser detection with decoding is a very effective way to increase system capacity in DS-CDMA systems.
提出了多级迭代干扰消除快跳频多址多用户检测算法。
A multistage iterative interference cancellation multiuser detection algorithm is presented for fast frequency-hopping multiple access communication systems.
通常CDMA系统接近波分复用的性能，但是也面临一些有待解决的问题，例如多用户时的谱干扰、散弹噪声等。
The Performance of CDMA approaches that of WDM, but it also faces some problems such as spectrum interference from multiple users and shot noise etc.
利用多用户检测技术可以抑制多址干扰，从而提高CDMA系统的容量和性能。
Multi-user detection technique can cancel multi-access interference, so it can enhance the capacity and performance of CDMA system.
在时间域处理采用2步并行干扰对消的多用户检测算法。
Also we compared the performance of decorrelator, LMMSE and a 2 stage PIC (parallel Interference Canceller) multiuser detector, which form the temporal processing of the receiver.
改进的多用户检测算法将子空间算法和约束优化算法结合起来，在强干扰信道中能有效提高系统性能。
This algorithm joint the constrained optimization algorithm and subspace algorithm, can improve the system performance in strong interfere environment.
多用户信号检测是研究码分多址通信网中多址干扰抑制方法的理论，近年来日益得到人们的重视。
Multiuser signal detection is a theory concerning the multiple access interferences in CDMA networks, which is given more and more attention recently.
在CDMA系统中，引入多用户检测、功率控制和天线阵列波束形成技术，可以有效地抑制干扰，提高系统容量。
The multiuser detection, power control and smart antenna technique can be used as power methods to suppress the interference, hence increasing the capacity of CDMA systems.
码分多址系统中的多用户信号检测，能有效地减少多址干扰、增加系统的容量、改善远近效应。
Multiuser detection can efficiently reduce Multi-access Interference in CDMA system. At the same time, it can increase system capability and improve near-far effect.
提出了一种将线性多用户检测与发射分集相结合的新方法，该方法能在克服信道衰落的同时抑制多址干扰和码间串扰。
A novel approach is proposed for linear multi user detection in conjunction with transmit diversity to combat channel fading, multi user interference and inter symbol interference.
多用户检测技术是码分多址系统中解决多址干扰的关键技术。
The multi-user detection is a key technique to solve the problem of MAI existing in DS-CDMA system.
盲自适应多用户检测器只需知道期望用户的扩频码及定时信息，就可以实现对多址干扰的有效抑制。
A blind adaptive multi user detector can suppress multi user interference, but only requiring timing and signature waveform of desired user.
直接序列码分多址分组多用户检测中，干扰用户包括小区分组外用户及相邻小区用户。
For group multiuser detection of DS-CDMA, the whole interferers were composed of the users in local cell and those in neighbor cells.
并通过限制权矢量的范数，实现了稳健的多用户联合信道干扰抑制。
By restraining the norm of the weight vector, robust multiuser access interference cancellation is achieved.
单小区多用户MIMO多接入系统性能受限于同信道干扰。
Single cell multiple user MIMO system is interference-limited by cochannel.
针对多址干扰信号的特点，研究了一种改进的硬判决并行干扰多用户检测器。
According to the characteristics of MAI in CDMA systems, a multi user detector is designed by a new hard decision parallel decision algorithm for MAI cancellation.
针对多址干扰信号的特点，研究了一种改进的硬判决并行干扰多用户检测器。
According to the characteristics of MAI in CDMA systems, a multi user detector is designed by a new hard decision parallel decision algorithm for MAI cancellation.
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