多址干扰引发严重的远近问题。
Multiple access interference cause seriously near-far impact.
多址干扰是影响码分多址系统性能的关键问题。
Multi-access interference is the key problem which restricts the performance of CDMA (code division multiple access) system.
采用迭代的检测与译码算法进行多址干扰的消除。
Iterative detection and decoding algorithm was applied to combat multiple access interference.
CD MA下行链路的性能受到信道衰落和多址干扰的影响。
The performance of downlink CDMA systems is influenced by channel fading and multi-access 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.
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.
但其本身存在多径干扰、多址干扰等问题，大大限制了复合系统中的用户容量。
However, it has multipath interference and muti-access interference which are disadvantages to the user capability of the multiplex system.
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.
介绍了改进高斯近似法，分析了其在计算DSCDMA系统多址干扰中的应用。
This paper presents an improved Gaussian approximation method for analyzing the MAI of DS CDMA system.
在CD MA通信系统中，多址干扰是影响系统性能和系统容量的主要因素之一。
Multiple access interference (MAI) is a major factor which limits the capacity and the performance of CDMA systems.
本文中提出的这种算法适用于多径衰落信道，能很好抵消多址干扰和克服多径衰落。
It can be used in multipath channels to suppress multi-address interference and overcome multi-channel fading.
当同时通话的用户数达到一定数量，多址干扰达到一定限度，系统将不能正常工作。
When many users connect at the same time, system can not work since multipath interference exceeds a limit.
首先论述该检测具有较强的多址干扰抑制能力，其性能不受解调信号的接收功率影响。
The results show that the performance of the detector is not affected by the received power of the demodulated signal.
传统的CDMA技术存在严重的多址干扰现象，使得信道的频谱效率不能达到最佳状态。
The traditional CDMA technology has serious multi address interference phenomenon, so the frequency spectrum efficiency of the channel can′t reach the optimal state.
分析了在信道存在加性白噪声和多址干扰的条件下，频带细化对提高频谱利用率的作用。
The effect of bandwidth division on the improvement of the frequency spectrum utilization is analyzed under the condition of the multi-access interference and Gaussian white noise.
仿真结果验证了本文方法具有良好的检测性能，可以在克服信道衰落的同时抑制多址干扰。
Simulation results demonstrate that the proposed method offers higher detecting performance and is capable of combating both channel fading and multiple-access interference.
因此，多址干扰是CDMA通信系统本身存在的自我干扰，它限制了蜂窝系统的通信容量。
Therefore, multiple access interference is self interference of CDMA Communication Systems, it restricts capacity of cell systems.
基于多径干扰、多址干扰和信道噪声的机理分析，推导了计算平均差错概率的有效近似公式。
An efficient approximation for expressions of the average error probability are developed based on considering the effects of multipath interference, multiple access interference and channel noise.
在准同步cdMA系统中，使用零相关区(ZCZ)序列能够避免共信道冲突和多址干扰。
Use of zero correlation zone (ZCZ) sequences can avoid co-channel interference and multi-access interference in the quasi-synchronous 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.
提出了码分多址(CDMA)系统中一种基于克莱姆·施密特正交化法则的多址干扰抑制算法。
A multiple access interference (MAI) cancellation algorithm employing Gram-Schmidt algorithm for code division multiple access (CDMA) systems is presented.
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.
采用矩空间理论和高斯近似法分别得出该系统在多址干扰和白高斯噪声条件下的平均误码率表达式。
Based on moment space theory and Gaussian approximation method, expressions of average error probability for system with multiple-access interference and white Gaussian noise environment are derived.
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.
功率控制技术是CD MA系统克服“远—近效应”，降低多址干扰、增大系统容量的一项关键技术。
Power control is a key technique in CDMA cellular mobile communication systems. It can combat near far effect, reduce multiple access interference and improve the system capacity.
本文通过概率分析，着重对这种系统的多址干扰、自干扰特性进行了研究并给出了误码率的数值结果。
By statistical analyzing, the characters of the MAI and self-interference are studied and the numerical results of the error bit rate are given.
然而多址干扰并不是码分多址系统固有的问题，是由传统CDMA系统采用单用户接收方案所造成的。
MAI is not caused by CDMA system itself, but by the traditional single user receiver strategy used in CDMA system.
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.
研究了运用迭代最小二乘（RLS）算法的智能天线系统提高IS 95系统抗多址干扰性能的方法。
This paper focuses on the effect of a RLS algorithm smart antenna employed in IS 95 system.
智能天线和干扰消除技术是从不同角度抑制码分多址系统多址干扰的方法，二者各有其特点及不足之处。
Smart antennas and interference cancellation are two different kinds of schemes to restrain multi-access interference, and each has its characteristic and defect.
应用推荐