搜索资源列表
sasdw.rar
- 现有数字信号自动调制识别方法大多只适用于无记忆信号，如PSK、ASK、FSK信号等。将有记忆 信号(MSK信号)和无记忆信号一起考虑，提出了一种改进的数字信号自动识别方法。该方法采用信号的瞬时统 计量作为特征参数，采用多层神经网络作为分类器。计算机仿真表明：当噪声采用高斯白噪声，并且信噪比大于 l5 dB时，识别率高于96％ ；当信噪比不低于l0 dB时，识别率不低于90％。,Existing digital signal automatic modulation recognition
DDS-baseddesignofthesinusoidalsignalgenerator
- 本设计采用AT89552单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术(DDS)的正弦谊号发生器。设计中采用DDS芯片AD9850产生频率1KHZ~10MHZ范围内正弦波，采用功放AD811控制输出电压幅度， 由单片机AT89S52控制调节步进频率1HZ。在此基础上，用模拟乘法器MC1496实现了正弦调制信号频率为1KHZ的模拟相度调制信号；用FPGA芯片产生二进制NRZ码,与AD9850结合实现相移键控PSK、幅移键控ASK、频移镇键FSK。-AT89552 the singl
06603
- TIMS硬件实验报告，实现模拟信号SSB、AM、FM，以及数字信号ASK、PSK、FSK的调制与解调，包含完整的模块连接图-TIMS hardware test report, the realization of analog signal SSB, AM, FM, and digital signal ASK, PSK, FSK modulation and demodulation, the modules contain a complete map
ZX
- 本系统以51单片机及FPGA为控制核心，由正弦信号发生模块、功率放大模块、调幅（AM）、调频（FM）模块、数字键控（ASK，PSK）模块以及测试信号发生模块组成-The system of 51 single-chip and FPGA for the control of the core module by the sinusoidal signal, power amplifier module, AM (AM), frequency modulation (FM) module, dig
4PSK
- 基于Matlab模拟实现，是基于Matlab的仿真，对软件的要求很高，要求用Matlab实现对信号的调制解调和对信道的模拟。-Matlab-based simulation implementation is based on the Matlab simulation, the software requirements, demanding to achieve with Matlab signal modulation and demodulation and analog channel
PSK
- 随着新技术的不断发展，数字期间有了越来越广泛的应用。在扩频系统中，已经开始研制数字相关解调器，从理论上讲，数字相关解调器必须有一个量化环节，因此，与模拟器件相关解调器相比，系统的信噪比会有所降低。但数字相关器件与模拟相关器件相比有更多的有点，模拟器件不容易做的大的时间带宽积，器件的性能对温度变化较敏感，而且编程困难，所以，数字相关解调的方案有独特的吸引力。-With the continuous development of new technology, digital has become
simulink
- simulink的数字调制解调仿真。以simulink为基础平台，对2ASK、2FSK、2PSK信号的仿真-Digital modulation and demodulation simulink simulation. The simulink-based platform, 2ASK, 2FSK, 2PSK Signal Simulation
QPSK_OQPSK
- 使用数值仿真和电路实验的方法,对Q PSK ( quadrature phase shift key ing)和OQ PSK ( off2 set quadrature phase shift keying)调制信号通过功率放大器后的频谱扩散问题进行了探讨。-Numerical simulation and circuit experiment using the method of Q PSK (quadrature phase shift key ing) and OQ PSK (off
ch03
- 杨建国老师的通讯原理课件，第三章模拟信号的调制与解调，主要讲述信号产生与调制，射频特性，解调，MSK、GMSK、PSK、QPSK、BPSK、QAM等原理-Yang Jianguo teacher communication principles of courseware, the third chapter of the analog signal modulation and demodulation, and focuses on the signal generation and mod
2psk
- 为了使数字信号在信道中有效地传播，必须使用数字基带信号的调制与解调，以使得信号与信道的特性相匹配。基于matlab实验平台实现对数字信号的2psk的调制与解调的模拟。本文详细的介绍了PSK波形的产生和仿真过程加深了我们对数字信号调制与解调的认知程度。-To make effective dissemination of the digital signals in the channel, must use the modulation and demodulation of the digit
BPSK_forma_onda_una
- Binary Phase Shift Keying (BPSK) is a type of phase modulation using 2 distinct carrier phases to signal ones and zeros. BPSK is the simplest form of PSK.
ASK_FSK_PSK
- this file content simple example about modulation bit stream.the type of modulation is (FSK,PSK and ask) after modulation data send and received after that show the relationship between signal to noise ratio (snr) and the bit error rate (ber).....
QPSK
- 数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。 -Digital modulation is the spectrum shifting to high frequency digital baseband signals, suitable for the formation of ban
5.--PSK-Demodulation-(Part-1)
- Phase-shift keying (PSK) is a modulation process whereby the input signal, a binary PCM waveform, shifts the phase of the output waveform to one of a fixed number of states. The demodulation process can be divided into three major subsections, as
05386026
- In a series of papers in recent years new structures for coherent M-PSK (M-ary Phase Shift Keying) receivers were suggested. These include structures for carrier phase detectors for the carrier PLL (Phase Lock Loop), carrier PLL lock dete
PSKmodulation
- 提出了一种不仅计算量小，而且可以在低信噪比下正确识别相位调制信号的方法。利用Matlab工具进行仿真，仿真结果表明，在信噪比不低于2 dB的情况下，对PSK子类调制信号的识别率可以达到93 以上。 -Proposed a method of calculating only a small amount, and can correctly identify the phase modulation signal at a low SNR. Use Matlab tool for simul
modulation
- 用MATLAB来仿真FSK、PSK、DPSK的调制、解调过程，并通过实验来比较它们的误码率和信噪比的关系。内附有matlab源代码-Using MATLAB to simulate FSK, PSK, DPSK modulation, the demodulation process, and to compare their bit error rate and signal to noise ratio by the empirical relationship. Enclosed is t
Baseband-modulation
- 基带数字信号调制方法总结.包括ASK PSK FSK-Baseband digital signal modulation methods are summarized, including ASK PSK FSK
QpskinRayleighfading
- While Multiple Phase Shift Keying (M-PSK) is much more spectrally efficient, the greater the number of smaller phase shifts, the more difficult the signal is to demodulate in the presence of noise. The benefit of M-PSK is that the constant carrier
Kite-Codes
- Kite codes, which were originally defined over the binary field, are generalized to arbitrary abelian groups in this paper. Kite codes are a special class of prefix rateless codes over groups, which can generate potentially infinite (or as many