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首页> 外文期刊>IEEE transactions on wireless communications >On antijamming in general CDMA systems-part I: multiuser capacity analysis
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On antijamming in general CDMA systems-part I: multiuser capacity analysis

机译：普通CDMA系统中的抗干扰问题-第一部分：多用户容量分析

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摘要

The capacity of a general multiuser CDMA jamming channel is analyzed when the receiver has or lacks jammer state information. Analyses are carried out for noncooperative and cooperative users in uplink and downlink static and Nakagami fading channels. The results are applied to a versatile multiaccess channel model which is based on the time-bandwidth dimensionality and is considered for the user capacity analysis of a variety of multiuser spread spectrum systems contaminated by jamming. In this model, different users are distinguished by signatures of either direct sequence or hopping type. It is found that the jammer should spread its energy evenly over all degrees of freedom in order to minimize the average capacity. Also, the capacity behavior appears to be dominated more by knowledge of jammer state information than by the effects of fading. The capacity of downlink channels in cooperative schemes is found to be more sensitive to changes in fading severity, compared with the capacity of other kinds of channels.
机译：当接收器有或没有干扰状态信息时，将分析通用多用户CDMA干扰信道的容量。在上行链路和下行链路静态和Nakagami衰落信道中针对非合作和合作用户进行分析。将结果应用于基于时间带宽维度的通用多路访问信道模型，并考虑将其用于各种受干扰污染的多用户扩频系统的用户容量分析。在此模型中，不同用户通过直接序列或跳跃类型的签名来区分。发现干扰器应在所有自由度上平均分配能量，以使平均容量最小。同样，容量行为似乎主要受干扰状态信息的了解而不是衰落的影响。与其他类型信道的容量相比，发现协作方案中下行链路信道的容量对衰落严重性的变化更为敏感。

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