QPSK

Secondly, it introduces the frequency selection, EMC ( Electromagnetic Compatibility), the basic generation theory and modulation of the third civil signal ( L5 signal), including LS ranging code, Forward Error Correction, QPSK modulation and Neuman.

其次，介绍了其信号的频段选择、电磁兼容性及其调制和产生的基本原理，包括L5测距码、卷积码、QPSK调制以及Neuman。

Development of Symbol Timing Recovery Circuit for Variable Rate QPSK Modem

可变速率QPSK Modem中码元定时恢复电路的研制

π/ 4 D-QPSK base-band modulation and demodulation method realized by DSP technology is better than FSK, ASK, PSK in technical criterion. It is according to the request of digital honeycomb system.

利用DSP手段，实现的π/4D-QPSK基带调制解调在技术要求方面要优于FSK、ASK、PSK等调制方式，更能满足数字蜂窝系统的要求。

A QPSK blind sequence detection algorithm based on the ε-equalization principle is proposed. The algorithm can formulate the quadrature phase shift keying blind sequence detection into a quadratic programming with integer constraints.

给出了基于ε-均衡准则的QPSK序列盲检测算法，该算法将QPSK序列盲检测问题转化为带整数约束的二次规划问题。

This m file performs the QPSK transmission and reception.

这米文件执行的QPSK传输和接收.

Research on Timing Synchronization Algorithm to Burst QPSK Signal Open Loop Structure

开环结构突发QPSK信号定时同步算法研究

The analysis of simulation waveform indicates that the programme achieves QPSK modulation and demodulation functions well.

通过对仿真波形的分析可知,该方案很好的实现了QPSK调制与解调功能.

QPSK as an advanced digital modulation technique is fit for the digital satellite communication system well.

QPSK作为一种先进的数字调制方式,特别适用于数字卫星通信系统.

Upon the prophase work of our staff room, we have accomplished the system of QPSK modulation and demodulation on the whole. We want to implement wireless transmission of RS-232C asynchronous serial data through QPSK modulator and demodulator.

本教研室在前期的工作中基本完成了QPSK调制解调系统的研制和开发，在此基础上，想要实现RS-232C异步串行数据通过现有的QPSK调制器和解调器来进行无线传输。

Symbol timing recovery in super high speed demodulation for QPSK signals

超高速数字解调中QPSK信号的符号同步研究

Theory of a High-Speed QPSK Demodulation and Its System View Simulation

高码速率QPSK解调载波恢复的原理与仿真

This paper researched an proved QPSK orthogonality demodulation scheme based on software radio and multi-core computer which adopts the way of concerned demodulation.

研究并论证了基于多核通用计算机平台和软件无线电的QPSK数字化正交解调方案，该方案采用相干解调方式。

BPSK, QPSK, OQPSK, UQPSK are used in TTC ( Track Telemetry and Control) of Satellite Link in recent years.

近年来，卫星测控链路中大量使用了OQPSK、UQPSK的调制方式。

And this system bhas been used in the QAM and QPSK applications and is recognized by the market.

并且已经在QAM和QPSK的综合应用领域受到了市场的认可。

MATLAB QPSK signal generation, and through Ruili Channel and AWGN channel simulation.

用MATLAB生成QPSK信号, 并通过瑞丽信道和AWGN信道的仿真.

This article mainly deals with the design of QPSK modulation and demodulation circuit.

本文主要阐述的是QPSK调制与解调电路的设计.

QPSK the additive white Gaussian noise environment, and the signal-to-noise ratio of the simulation.

QPSK在 加性高斯白噪声环境下, 信噪比和误码率的仿真.

π/ 4-QPSK may apply to PLC ( Power Line Carrier) for telecontrol information transmission.

π/4-QPSK调制解调器可用于电力线载波机传输远动装置信号。

Model of QPSK modulation code integrity, and can be used directly.

QPSK调制模式的源代码的完整性, 并可以直接使用.