At first we must plan the passive house as direct gain system.
首先，我们必须将被动式房屋作为一种直接获取系统。
To solve these problems, this paper presents a high performance, namely low voltage, high linearity and high conversion gain, CMOS direct down conversion mixer for UWB (Ultra Wide Band) system.
基于这种背景，本文提出了一种应用于超宽带系统的高性能（低压、高线性度、高变频增益）直接下变频混频器，采用标准的CMOS工艺设计和实现。
In direct sequence spread spectrum communication system when the spreading gain is limited, the performance of the communication system will be impacted by the strong power of narrowband interference.
在直接序列扩频通信系统的扩频增益受限时，强功率的窄带干扰对系统性能影响较大。
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