搜索资源列表
xhfsqyanjiu
- 基于直接数字频率合成(DDS) 原理，利用AT89C52 单片机作为控制器件，采用AD9850 型DDS 器件设计一个信号发生器。给出了信号发生器的硬件设计和软件设计参数，该系统可输出正弦 波、方波，且频带较宽、频率稳定度高，波形良好。该信号发生器具有更强的市场竞争力，在跳频技术、 无线电通信技术方面具有比较广阔的发展前景。-Based on Direct Digital Synthesis (DDS) theory, using AT89C52 microcontroller as
TheoryCodeDivisionMultipleAccess
- THEORY OF CODE DIVISION MULTIPLE ACCESS COMMUNICATION The objective of this book is to provide an introduction to code division multipleaccess (CDMA) communications. Our motivation for emphasizing CDMA communication is a result of the tec
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
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
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
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
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
05695303
- Orthogonal Frequency Division Multiplexing (OFDM) has been adopted by most wireless and wired communication standards these include wireless Local Area Networks (LANs) HyperLan2, 802.11a, broadband wireless(802.16) and lately the 802.15.3c for mill
mini-project
- Frequency Modulation radio Circiuts
nRF24L01_Product_Specification_v2_0
- The nRF24L01 is a single chip 2.4GHz transceiver with an embedded baseband protocol engine (Enhanced ShockBurst™ ), designed for ultra low power wireless applications. The nRF24L01 is designed for operation in the world wide ISM frequency ba
ofdm-tx-rx
- Abstract Orthogonal frequency division multiplexing (OFDM) is becoming the chosen modulation technique for wireless communications. OFDM can provide large data rates with sufficient robustness to radio channel impairments. Many research centers
out
- A TUTORIAL ON LTE EVOLVED UTRAN (EUTRAN) AND LTE SELF ORGANIZING NETWORKS. The main features of LTE are high peak data rate, flexibility of spectrum usage, low latency times, higher capacity per cell, etc. The radio interface of LTE is based on O
3
- Abstract-The mobile radio channel can be simulated as a complex-valued random process with a time-varying variance. This paper describes an implementation of that process using a real-time Digital Signal Processing (DSP) technique. The simulato
OFDM-Sim-Using-Matlab
- Orthogonal frequency division multiplexing (OFDM) is becoming the chosen modulation technique for wireless communications. OFDM can provide large data rates with sufficient robustness to radio channel impairments. Many research centers in the w
ofdm
- Based on the principle of OFDM system, the paper mainly includes the following aspects: the development of mobile communications, the characteristics of the radio channel, OFDM system theory, the advantages and disadvantages, key technologies, and ad
TA3113_www.ic37.com
- 收音机接受芯片，内部含有二中频，还有rssi等功能-Radio receiving chip contains two internal frequency, as well as other functions rssi
1
- 天力通th445，th140的写频方法，有意向研究此机器的无线电爱好者来此下载-Days Stratton th445, th140 frequency method of writing, with the intention to study the machine' s radio enthusiasts to download