The performance of downlink CDMA systems is influenced by channel fading and multi-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。
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。
Multi-user detection technique can cancel multi-access interference, so it can enhance the capacity and performance of CDMA 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。
Use of zero correlation zone (ZCZ) sequences can avoid co-channel interference and multi-access interference in the quasi-synchronous CDMA systems.
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。
Smart antennas and interference cancellation are two different kinds of schemes to restrain multi-access interference, and each has its characteristic and defect.
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。
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.
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。
Simulation results show that the system has the ideal bit error rate performance and the high capability of multi-access interference, thus having a broad application future.
文中对新构建系统的误码率性能进行了分析，仿真结果表明，该系统具有理想的误码率性能，抗多址干扰能力强，具有非常广阔的应用前景。
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.
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。
On this basis, the uplink interference is analyzed and a multi service call access control strategy is proposed.
在分析上行链路干扰的基础上，兼顾移动性提出了一种分层小区系统的多业务呼叫接纳控制策略。
On this basis, the uplink interference is analyzed and a multi service call access control strategy is proposed.
在分析上行链路干扰的基础上，兼顾移动性提出了一种分层小区系统的多业务呼叫接纳控制策略。
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