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书籍 SC-FDMA+for+Mobile+Communications
The single-carrier frequency division multiple access (SC-FDMA)
system is a well-known system that has recently become a preferred
choice for mobile uplink channels. This is attributed to its advantages
such as the low peak-to-average power ratio (PAPR) and the use of
frequency domain equalizers. Lo ...
技术资料 JPEG压缩matlab源码
JPEG压缩解压缩的matlab源代码：
1) take an image (2D matrix) and devide it to 8x8 matrices
2) for each matrix (8x8) use the DCT conversion (from the signal
processing toolbox). you will get an (8x8) matrix as an answer
3) build an 8x8 matrix, which is the sum off all the matrices, such
tha ...
电源技术 优化输电线路 精确测量电压驻波比(VSWR)
Abstract: Impedance mismatches in a radio-frequency (RF) electrical transmission line cause power loss andreflected energy. Voltage standing wave ratio (VSWR) is a way to measure transmission line imperfections. Thistutorial defines VSWR and explains how it is calculated. Finally, an antenna VSWR ...
系统设计方案 In 揚erformance of multi-carrier DS CDMA Systems?we apply a multi-carrier signaling technique to a di
In 揚erformance of multi-carrier DS CDMA Systems?we apply a multi-carrier signaling technique to a direct-sequence CDMA system, where a data sequence multiplied by a spreading sequence modulates multiple carriers, rather than a single carrier. The receiver provides a correlator for each carrier, and ...
技术资料 射频技术重点入门基础 天线射频RF基础
射频技术重点入门基础 天线射频RF基础频率和波长及线缆电介常数关系
相位和波长关系
什么是dB和dBm
回波损耗(RL)和驻波比(VSWR)关系
阻抗和衰减
互调(IM3,PIM)
ＲＦ天线常用指标：
极化 ( Polarisation )
波束宽( Beamwidth)
旁瓣抑制 (Side Lobe Suppression)
下倾角 (Down Tilt)
前后比 (Front to back Ratio)
隔离度 ( I ...
模拟电子 RF至数字接收器的信号链噪声分析
 
Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirem ...
通讯/手机编程 In this project we analyze and design the minimum mean-square error (MMSE) multiuser receiver for un
In this project we analyze and design the minimum mean-square error (MMSE) multiuser receiver for uniformly quantized synchronous code division multiple access (CDMA) signals in additive white Gaussian noise (AWGN) channels.This project is mainly based on the representation of uniform quantizer by ...
电源技术 零晶体管IC-IC设计一个新高度
Abstract: We can apply a BiCMOS integrated circuit with only resistors and no transistors to solve adifficult design problem. The mythically perfect operational amplifier's gain and temperature coefficient aredependent on external resistor values. Maxim precision resistor arrays are manufactur ...
电源技术 开关稳压器的偏置低噪声变容
 
Telecommunication, satellite links and set-top boxes allrequire tuning a high frequency oscillator. The actualtuning element is a varactor diode, a 2-terminal device thatchanges capacitance as a function of reverse bias voltage.1 The oscillator is part of a frequency synthesizingloop, as ...
matlab例程 This program compress and recostruct using wavelets. We can select level of decomposition(here maxim
This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet.
For eg:-wavelets can be haar, db1, db2,dmey...............
Decomposition can be viewed in figure.
(Please note that select 256X256 image for be ...