down conversion meaning in English
降频转换
下变换
Examples
- One is the digital down conversion . the method of look - table is described in detail
其一是数字下变频算法，重点说明了其中的查表法及其推广。 - The receiver used two stages of down conversion . the total gain of receiver is more than 43db
接收支路采用超外差两次下变频的方式,实验表明接收支路的总增益大于43db 。 - Unlike the monostatic sar , two independent local oscillators are used for up / down conversion in bistatic case , so low frequency components of phase noise cannot be cancelled
双基地sar用两个独立的本振分别实现上变频和下变频,相噪低频分量不能相互抵消,形成与单基地sar不同的低频相噪。 - This dissertation focuses on the carrier recovery in high dynamic navigation receiver , the effect of iq mismatch in direct down conversion receiver and the signal to noise ratio estimator in navigation receiver
本文以二代卫星导航定位系统为应用背景,着重研究了接收机中的载波恢复技术、 iq非正交对伪码和载波影响的模型、载噪比估计技术。 - Transmit / receive ( t / r ) modules is the base of the modern radar . the paper puts forth a design scheme according to the target including t / r switch , up conversion , power amplified , low noise receive and down conversion . the dimension is restricted to 106 89mm through scheme comparison and the existing experiment condition , the final products arrive at the target we expect with millimeter hybrid integrated circuit
收发t / r组件在当今雷达系统中占有举足轻重的地位,本文根据设计指标提出了毫米波前端的设计方案,系统功能上要求完成收发双工、上变频和功率放大、低噪声放大和下变频功能,外形尺寸为106 89mm ,通过综合方案比较,结合自身条件,选取了毫米波混合集成电路形式。