搜索资源列表
2ASK.二进制幅度键控
- ASK(二进制幅度键控)是一种最简单的数字信号的载波传输,本文通过对数字信号的2ASK调制,解调在不同信噪比的情况下误码率分析,得出不同信噪比下的误码率。 通过对2ASK的仿真更好的理解了数字调制系统的组成以及各模块的功能。 ,ASK (binary amplitude shift keying) is a simple digital signal carrier transmission, this paper 2ASK digital signal modulation, demod
QPSK
- 提出了一个采用(2,1,7)卷积码+QPSK的中频调制解调方案,并在Xilinx公司的100万 门FPGA芯片上实现了该系统。该系统在信噪比SNR为6dB左右时可实现速率超过1Mbit/s、误码率 小于10-5的数据传输。 -Proposed a use of (2,1,7) convolutional code+ QPSK modulation and demodulation of the IF program, and in Xilinx' s FPGA chip one
simplex_wireless_calling_system
- 单工无线呼叫系统分发射和接收两大部分。发射部分采用锁相环式频率合成器技术, MC145152和MC12022芯片组成锁相环,将载波频率精确锁定在35MHz,输出载波的稳定度达到4×10-5,准确度达到3×10-5,由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制;末级功放选用三极管2SC1970,使其工作在丙类放大状态,提高了放大器的效率,输出功率达到设计要求。接收部分以超大规模AM/FM立体声收音集成芯片CXA1238S为主体,灵敏度、镜像抑制、信噪比等各项性能指标均达
BER
- C program to calculate the BER performance of BPSK modulation in an AWGN channel. The program takes the file "BPSK" containing voltage levels and passes it in an AWGN channel with a given SNR. The received message is then Hard decision decoded and th
jcsb
- 文中研究了6种常用数字调制信号识别的特征参数集,并采用决策树判别方法进行分类识别。仿真结果表明,在SNR≥5dB时,识别正确率在99 以上,且当SNR≥20dB时,识别正确率达到100 。其特点是,算法简单,识别正确率高,达到了自动分类识别的目的,并有利于实现识别的实时化。-In this paper, we study the set of characteristic parameters of the six kinds of commonly used digital modulatio
on-the-modulation-technology-in-OFDM
- 在 OFDM 数学原理和收发模型的基础上,本文对帧同步、定时同步、频率同 步和采样同步给 OFDM 系统所产生的影响进行了理论分析,同时讨论了基于循环 前缀或训练符号的典型 OFDM 同步算法。参考 802.11a 突发数据帧结构和系统参 数,分析几种 OFDM 同步算法用于突发分组传输的性能;在分析了几种经典的信 道估计算法基础上,通过对复杂度和性能的折衷,选择一种适合本文系统的估计 算法。最后作者提出一种改进型 LS 信道估计算法,该算法考虑了 LS 算法中噪声 的影
BERvsSNR
- Matlab code for explain the relation between BER and SNR for different Modulation-Matlab code for explain the relation between BER and SNR for different Modulation
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).....
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
sigma-delta-modulation
- 高精度、低功耗模数转换器是当今集成电路设计模拟领域的研究热点之一,采用sigma-delta调制原理和过釆样原理的模数转换器广泛使用在音频、数字网络、电子测量等系统中。此类模数转换器,为降低信号带内的量化噪声功率,而釆用噪声整形技术,为提高模数转换器的信噪比,使用过采样技术,将基带中的量化噪声调制到了高频区域,这样就增加了基带中的信噪比,也就是增加了转换器的有效量化位数,由于采用较高的过采样率,Sigma-Delta ADC的转换速率相对较低,高精度和较低转换速率的特点,使得Sigma-Delt
P3
- Perform base band QPSK modulation of a bit stream: (a) without using in-built function, (b) using in-built function. Pass it through an AWGN channel and plot SNR versus BER of the received signal.
carrier-synxronization-OQPSK
- This article contains analyses of the performance of various carrier synchronization loops for offset quadrature phase-shift-keying (OQPSK) modulation, all motivated in one form or another by the maximum a posteriori (MAP) estimation of carrier
Modulation
- 将 PCM 编码后的录音经过 16QAM 系统,试听不同信噪比下的录音-The recording PCM encoded through 16QAM system, listen to the recording of different SNR
fiu-V6.6
- 包含位置式PID算法、积分分离式PID,最大信噪比的独立分量分析算法,ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块。- It contains positional PID algorithm, integral separate PID, SNR largest independent component analysis algorithm, ofdm system simulation including 16qam modulation fft windowing mo