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IEEE 802.15.4g
- IEEE 802.15.4g ABSTRACT OF THE THESIS Implementing physical layer (PHY) of IEEE 802.15.4g standard with Direct Sequence Spread Spectrum (DSSS) using Offset Quadrature Phase Shift Keying (O-QPSK)
ofdm_ber_freqofset
- bit error rate calculation for ofdm using qpsk modulation with frequency offset
frequency_estimation
- QPSK开环载波同步技术研究 频偏估计算法-Open-loop carrier synchronization QPSK Research Frequency Offset Estimation Algorithm
ModDemodOQPSK
- This file is the matlab source code for offset QPSK (OQPSK) modulation and demodulation in wireless and mobile communications
script_ber_msk_awgn
- Minimum Shift Keying (MSK), uses two frequencies which are separated by 1/2T and phase discontinuity is avoided in symbol boundaries. Further, MSK transmission can also be visualized as a variant of offset-QPSK technique, where sinusoidals are used f
frequency_recovery
- 在C++平台上实现QPSK调制，加频偏过AWGN信道，然后采用COSTAS的方法进行载波恢复-In the C++ platform for a QPSK modulation, plus offset over AWGN channel, and then use the methods COSTAS carrier recovery
qpsk_simulink
- In this simulink model , QPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is mat
qpsk1
- QPSK and offset QPSK(MSK) wave generation
Offset-Qpsk-Vs-Qpsk
- difference between quadrature phase shift keying and offset quadrature phase shift keying
On-the-Design-of-Frequency-Domain-Equalizers-for-
- This paper considers frequency-domain receiver design for OQPSK signals (Offset Quaternary Phase Shift Keying). It is shown that conventional QPSK receivers are not suitable to OQPSK schemes since they lead to significant interference between
All-DigitalQPSK-Demodulator
- Altem公司quartus II 8．1开发环境下，完成了中频全数字解调器的FPGA实现，并对数 字下变频、载波同步、位同步等解调器的核心模块设计进行了详细的分析和说明，给出 了实现框图和仿真波形。同时在本设计中应用了Altera公司的NiosII软核处理器技术， 用于载波的大频偏校正和解调器各个部分的监测和控制。最后给出了QPSK中频全数字 解调器关键性能指标的测试方法和测试结果，测试结果表明本设计达到了预期的性能指 标要求。-The Algorithm is con
DigModTutorial
- 介绍通信系统基本结构的simulink仿真程序，包括了脉冲成形，OOK，BPSK，4-ASK，QPSK，Offset-QPSK,MSK,16-QAM的调制解调simulink仿真，可以观察的调制波形和误码率。-This tutorial program introduces the infrastructure of commnication system in simulink form.It contains the simulation of Pulse Shape,OOK，BPSK，4-
qpsk_demod_use_FPGA
- 根据软件无线电的思想，提出了一种新颖的数字信号处理算法，对QPSK信号的相位进行数字化处理，从而实现对QPSK信号的解调.该算法允许收发两端载波存在频差，用数字锁相实现收发端载波的同步，在频偏较大的情况下，估算频偏的大小，自适应设置环路的带宽，实现较短的捕获时间和较好的信噪性能。整个设计基于XILINX公司的ISE开发平台，并用Virtex-II系列FPGA实现。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、扰干扰能力强的特点，符合未来通信技术发展的方向。-According
Kay_algorithm
- QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的Kay法-QPSK-carrier frequence offset estimation_ kay
Fitz_algorithm
- QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的Fitz法-QPSK-carrier frequence offset estimation_ Fitz
LR_algorithm
- QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的L&R法-QPSK-carrier frequence offset estimation_ L&R
11-OtherLinearTechniques
- Differential PSK (DPSK) Inexpensive Quadrature Phase Shift Keying (QPSK) Twice as spectrally efficient than BPSK Offset QPSK (OQPSK) reduce envelope variation π/4 QPSK
QPSK
- 使用matlab对无线通信中重要的调制技术QPSK进行了仿真设计，包括调制，信道环境模拟，解调，最重要的是解决了无线通信中的载波同步问题，对频偏和相偏进行了估计，也实现了码元同步。-Use matlab important wireless communication QPSK modulation technique simulation design, including modulation, channel environment simulation, demodulation, th
一种QPSK全数字化载波频偏估计算法
- 信号利用QPSK调制，采用全数字化的频偏估计方法(A full digital frequency offset estimation method using QPSK modulation)
freq_estimate
- 该工程实现对单载波系统QPSK的频偏估计算法。调相信号在接收机相干解调时需要同频同相的参考载波，而发射机和接收机之间往往存在频率偏差，为了消除这种误差，必须在软件层面实现。使用了QPSK四相调制的信号特点进行载波频偏估计，经验证，效果较好。(This project implements frequency offset estimation algorithm for single carrier system QPSK. The phase modulation signal needs t