Multiple access interference cause seriously near-far impact.
多址干扰引发严重的远近问题。
Iterative detection and decoding algorithm was applied to combat multiple access interference.
采用迭代的检测与译码算法进行多址干扰的消除。
Multiple access interference (MAI) is a major factor which limits the capacity and the performance of CDMA systems.
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。
Power control and multiuser detection are two ways to cope with the multiple access interference (MAI) and near-far effect.
功率控制和多用户检测是CD MA移动通信系统中克服远近效应、抑制多址干扰(MAI)的两项关键技术。
Therefore, multiple access interference is self interference of CDMA Communication Systems, it restricts capacity of cell systems.
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。
In this paper, a new scheme is proposed corresponding to solve a huge matrix equation under the multiple access interference (MAI) environments.
本文提出了一种在多址干扰(MAI)的环境下解一个大的矩阵方程的新方案。
A multiple access interference (MAI) cancellation algorithm employing Gram-Schmidt algorithm for code division multiple access (CDMA) systems is presented.
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 general space-time CDMA system model in multipath fading channels is built to study how to suppress both multiple access interference (MAI) and multipath fading.
通过建立了一般的空时CD MA系统模型，探讨多址干扰和多径效应的联合抑制问题。
The capacity and performance of a DS-CDMA system is greatly limited by Multiple Access Interference (MAI) and therefore many multiuser detection algorithms have been proposed.
在直序扩频码分多址(DS -CDMA)系统中，多址干扰(MAI)极大地制约系统容量及性能。
Simulation is performed for different number of users, and results show that this algorithm can efficiently suppress multiple access interference and improve system performance.
分别对不同用户数目的系统进行计算机仿真，结果表明，采用本算法后，能有效地抑制多址干扰，极大地提高了系统的性能。
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.
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。
In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception.
在CD MA移动通信系统中，多址接入干扰可以通过多用户检测技术来消除，而分集接收可以减小信道衰落的影响。
In DS CDMA channels with multipath and multiple access interference, this paper estimates blindly the user channel with extended space time channel model to process the blind MMSE detection.
在多径多址干扰DS CDMA环境中，本文根据空时信号模型，用扩展的盲方法估计用户信道，从而进行盲mmse检测。
In a mobile environment, ICI is mainly caused by Doppler frequency shift. While, when combined with CDMA, Multiple Access Interference (mai) is another key factor affecting system performance.
在移动环境下，ICI的产生主要由多普勒频移引起，同时，与CDMA结合后，CD MA系统本身的多址干扰(MAI)也是影响系统性能的关键因素。
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.
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；
In order to improve the detection reliability of each iterative stage, the stronger users' current stage hard decisions are used to regenerate the weaker users' multiple access interference (MAI).
为了提高每个迭代级检测的可靠性，该文将当前级已经检测出的能量较强用户的硬判决值用于重构当前级能量较弱用户的多址干扰(MAI)。
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.
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。
In direct sequence code division multiple access (DS-CDMA) communications, blind signal detection and interference cancellation are the important methods to increase system capacities.
在直扩码分多址(DS - CDMA)通信中，盲信号检测及干扰抑制技术是增加系统容量的重要手段。
Simulation results demonstrate that the proposed method offers higher detecting performance and is capable of combating both channel fading and multiple-access interference.
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。
Multi-access interference is the key problem which restricts the performance of CDMA (code division multiple access) system.
多址干扰是影响码分多址系统性能的关键问题。
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.
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。
A multistage iterative interference cancellation multiuser detection algorithm is presented for fast frequency-hopping multiple access communication systems.
提出了多级迭代干扰消除快跳频多址多用户检测算法。
The feasibility criterion of power control in interference-limited direct sequence code division multiple access (DS-CDMA) systems is investigated.
研究了直接扩频码分多址(DS - CDMA)干扰受限系统的功率分配的可行性问题。
The feasibility criterion of power control in interference-limited direct sequence code division multiple access (DS-CDMA) systems is investigated.
研究了直接扩频码分多址(DS - CDMA)干扰受限系统的功率分配的可行性问题。
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