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Spectrum-Hole-Detection
- 本文首先介绍了认知无线电的基本概念,对认知无线电在WRAN系统、UWB系统及WLAN系统等领域的应用分别进行了讨论。在此基础上,针对实现认知无线电的关键技术从理论上进行了探索,分析了影响认知网络正常工作的相关因素及认知网络对授权用户正常工作所形成的干扰。从理论上推导了在实现认知无线电系统所必须面对的弱信号低噪声比恶劣环境下,信号检测的相关方法和技术,并进行了数字滤波器的算法分析,指出了窗函数的选择原则。-The development of the wireless business resul
Simulations-for-Radar-Systems-Design
- OFDM simulation using matalab. -Orthogonal Frequency Division Multiplexing technology for cognitive radio!!!!
Mobile-communications-design-fundamentals2
- Revised and enlarged version that discusses how to design a mobile communications system. Comprehensively examines the mobile radio environment. Covers prediction of propagation loss, calculation and methods of reducing fades, interference, frequency
FM
- FM调制与解调(MATLAB程序与图) FM也是一种调制方式，即使在短波范围内的27-30MHz之间，做为业余电台、太空、人造卫星通讯应用的波段，也有采用调频（FM）方式的。-FM modulation and demodulation (MATLAB program and map) FM is a modulation, even in the short wavelength range of between 27-30MHz, as amateur radio, space, sat
MP3_Radio_Chips_RDA5807SP
- RDA5807芯片是目前市场上封装最小的 FM收音模块，它具备驱动能力强,可直接驱动耳机及放大器，覆盖频率从65M-108M 的各国调频波段，并且采用了I2C 总线控制模式，支持强大的LOW-IF数字音频结构和强大的数字信号处理技术（DSP）,实现自动频率控制和自动增益控制等技术。该芯片在MP3领域当中使用非常广泛，可与:瑞芯微,Ali,鼎智,炬力,君正,山景,中颖等方案配合使用。 -RDA5807 chip is the smallest packages on the market FM
adjustBW
- Bandwidth (signal processing) or analog bandwidth, frequency bandwidth or radio bandwidth: a measure of the width of a range of frequencies, measured in hertz Bandwidth (computing) or digital bandwidth: a rate of data transfer, bit rate or through
jies
- 超再生接收电路和无线电发射器工作原理,对设计高频电路很有用-Super-regenerative receiver circuit and a radio transmitter works, is useful for the design of high-frequency circuits
feedforward-MSK-demodulator
- A fully digital feedforward MSK demodulator with joint frequency offset and symbol timing estimation for burst mode mobile radio
example5_3
- 超外差接收机的matalab功能模块仿真，调幅中波收音机的接收頻率段为550KHz 到605KHz，中频为465KHz-The matalab specialized superheterodyne receivers function modules simulation, am medium-wave radio shows for 550 KHz to receive 605 KHz, intermediate frequency for 465 KHz
VHF_all_band_jam
- 该模块主要完成跳频通信中敌意干扰下全频段干扰，该干扰主要是针对超短波电台，采用simulink编写。-The module is mainly to complete the full-band interference in frequency hopping communication in hostile interference, the interference for FM radio, written using simulink....
mymatlab
- For free space path loss, fc=1.5GHz (Carrier frequency) If we take different antenna gains such as 1.(Gt=1,Gr=1)and 2.(Gt=1,Gr=0.5)and 3.(Gt=0.5,Gr=0.5) When we reduce the antenna gains (i.e. the transmitting gain or the receiving gain) there is
power-control-research
- 采用博弈论对认知无线电中的分布式动态频率选择和功率分配策略进行建模分析，通过建立合作来协调认知节点间的行为，从而提高分布式决策算法的性能。-Game Theory Modeling and Analysis of Distributed Dynamic Frequency Selection in cognitive radio and power allocation strategy to coordinate, through the establishment of cooperatio
Fading-channel-simulation
- 衰落信道仿真 function r = rayleigh( fd, fs, Ns ) r = rayleigh(fd,fs,N) A Rayleigh fading simulator based on Clarke s Model Creates a Rayleigh random process with PSD determined by the vehicle s speed. INPUTS: fd = doppler frequency
OFDM-signals
- 针对无线电监测和认知无线电系统中正交频分复用(OFDM) 信号参数估计这一重要问题,提出了用频域累积法算OFDM 信号的循环自相关函数的数值计算方法.-For radio monitoring and cognitive radio systems, orthogonal frequency division multiplexing (OFDM) signal parameter estimation of this important issue, the accumulation meth
OFDM-signals-with-low-SNR
- 针对认知无线电系统中正交频分复用( OFDM )信号参数估计这一重要问题, 利用OFDM 信号的循环谱实现了符号周期的盲估计。-For cognitive radio systems, orthogonal frequency division multiplexing (OFDM) signal parameter estimation of this important issue, the cyclic spectrum of the OFDM signal to achieve the
CS8955_RDS
- RDS(Radio Data System)数据广播系统是将数字信号调制到调频波段 (87.5~108MHz)并以广播的形式发送的一种信号传输系统。这种传输模式在北美 和欧洲得到了采用，而且得到越来越多的其他国家的关注。在北美和欧洲 都有 相应的标准，即RBDS 和RDS。 传输数据时，数据加载到57KHz 的副载波频段。副载波经过调制以适应固定 的双相编码信号。这个副载波经过抑制以避免调制后的数据在锁相环立体声解码 器中产生混叠同时还要与德国同样采用57KHz 频率作为
Doppler_spectrum
- 无线信道存在的多普勒频移，对信道产生影响，编程仿真多普勒频移效应-Radio channel exists Doppler shift, the impact of channel programming simulation, Doppler frequency shift effect
AM
- AM MODULATION: It is matlab code for AM,DSBSC,SS B with carrier ,ISB, & multitone AM & their spectrum. AM is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. AM works by varying the st
loBzt1RL
- 频率合成高频头控制代码，应用于高频头制作选台器，收音机的方面。-Frequency synthesizer tuner control code used in high-frequency head production tuner radio.
ETSI-Ultra-Wide-Band
- Ultra Wide Band (UWB) is a technology for the transmission of data using techniques which cause a spreading of the radio energy over a very wide frequency band, with a very low power spectral density. The low power spectral density limits the interfe