基于3G UMTS/WCDMA技术的自适应调制方案
发布时间：2023-05-07 23:00
自适应调制技术表示根据无线信道的条件来选择应用的调制方案。在现代,由于带宽有限,自适应调制方案在无线通信系统中得到了广泛的使用。自适应调制方案有效地利用了可用带宽,来增加系统的吞吐量。它的主要目的是降低误码率,提高无线通信系统的吞吐量。在本文中,将自适应调制方案应用于3G UMTS/WCDMA无线通信技术中,通过无线信道的信噪比来调节调制模式,以实现降低误码率,提高吞吐量和提高信号服务质量。自适应调制可以应用与一个广大的覆盖区域。与3GUMTS/WCDMA中的64-QAM的单调制方案相比,由于自适应调制方案中吞吐量更高,无线信道衰落效应和数据错误率带来的影响大大降低了。同时,通话质量将得到改善;即使用户在远离BTS的地方通话也不会在受到频繁掉线的困扰。在自适应调制方案中,我们应用了不同调制方案(例如64-QAM,16-QAM,QPSK,BPSK),这使得我们能够在每符号每秒传输大连的消息比特,从而获得大的吞吐量或者更好的频谱效率。自适应调制的利用,使得无线系统能够针对信道情况找到最佳数字调制方案。本文中分析了不同组合的数字调制方案的性能改善效果,本文中研究的是一种最佳的数字调制组合方案...
【文章页数】：133 页
【学位级别】：硕士
【文章目录】：
摘要
ABSTRACT
CHAPTER 1. INTRODUCTION
1.1 BACKGROUND OF THE ADAPTIVE MODULATION
1.2 MOTIVATION
1.3 PROBLEM STATEMENT
1.4 OBJECTIVES
1.5 INTRODUCTION OF THE ADAPTIVE MODULATION
1.6 SIGNIFICANCE OF THE RESEARCH
1.7 OVERVIEW OF THE THESIS
CHAPTER 2. BASIC PRINCIPLE OF MODULATION SCHEMES
2.1 OVERVIEW
2.2 MODULATION SCHEMES
2.2.1 BPSK
2.2.2 QPSK
2.2.3 QAM
2.3 ADAPTIVE MODULATION SCHEME
2.4 SNR ESTIMATION
CHAPTER 3. METHODOLOGY
3.1 OVERVIEW
3.2 BPSK MODULATION
3.2.1 Generation of BPSK Signal and Measuring of SNR
3.2.2 BER vs SNR of BPSK
3.3 QPSK MODULATION
3.3.1 Generation of QPSK Signal and Measuring of SNR
3.3.2 BER vs SNR of QPSK
3.4 16-QAM MODULATION
3.4.1 Generation of 16-QAM Signal and Measurement of SNR
3.4.2 BER vs SNR of 16-QAM
3.5 64-QAM MODULATION
3.5.1 Generation of 64-QAM Signal and Measurement of SNR
3.5.2 BER vs SNR of 64-QAM
3.6 ADAPTIVE MODULATION SCHEMES
CHAPTER 4. ADAPTIVE MODULATION IN SIMULATED ENVIRONMENT
4.1 OVERVIEW
4.2 SINGLE BASE STATION IN SIMULATED ENVIRONMENT
4.3 TWO BASE STATION IN SIMULATED ENVIRONMENT
4.4 SIX BASE STATION IN SIMULATED ENVIRONMENT
CHAPTER 5. ADAPTIVE MODULATION IN REAL SITUATION
5.1 FIRST REAL SITUATION HAVING NO MOTION OF MOBILE USER W.R.T B. S
5.2 SECOND REAL SITUATION HAVING MOTION OF MOBILE USER W.R.T B. S
5.3 ADAPTIVE MODULATION IN COMPLEX FADING ENVIRONMENT
CONCLUSIONS
REFERENCES
ACKNOWLEDGEMENT
本文编号：3811495
【文章页数】：133 页
【学位级别】：硕士
【文章目录】：
摘要
ABSTRACT
CHAPTER 1. INTRODUCTION
1.1 BACKGROUND OF THE ADAPTIVE MODULATION
1.2 MOTIVATION
1.3 PROBLEM STATEMENT
1.4 OBJECTIVES
1.5 INTRODUCTION OF THE ADAPTIVE MODULATION
1.6 SIGNIFICANCE OF THE RESEARCH
1.7 OVERVIEW OF THE THESIS
CHAPTER 2. BASIC PRINCIPLE OF MODULATION SCHEMES
2.1 OVERVIEW
2.2 MODULATION SCHEMES
2.2.1 BPSK
2.2.2 QPSK
2.2.3 QAM
2.3 ADAPTIVE MODULATION SCHEME
2.4 SNR ESTIMATION
CHAPTER 3. METHODOLOGY
3.1 OVERVIEW
3.2 BPSK MODULATION
3.2.1 Generation of BPSK Signal and Measuring of SNR
3.2.2 BER vs SNR of BPSK
3.3 QPSK MODULATION
3.3.1 Generation of QPSK Signal and Measuring of SNR
3.3.2 BER vs SNR of QPSK
3.4 16-QAM MODULATION
3.4.1 Generation of 16-QAM Signal and Measurement of SNR
3.4.2 BER vs SNR of 16-QAM
3.5 64-QAM MODULATION
3.5.1 Generation of 64-QAM Signal and Measurement of SNR
3.5.2 BER vs SNR of 64-QAM
3.6 ADAPTIVE MODULATION SCHEMES
CHAPTER 4. ADAPTIVE MODULATION IN SIMULATED ENVIRONMENT
4.1 OVERVIEW
4.2 SINGLE BASE STATION IN SIMULATED ENVIRONMENT
4.3 TWO BASE STATION IN SIMULATED ENVIRONMENT
4.4 SIX BASE STATION IN SIMULATED ENVIRONMENT
CHAPTER 5. ADAPTIVE MODULATION IN REAL SITUATION
5.1 FIRST REAL SITUATION HAVING NO MOTION OF MOBILE USER W.R.T B. S
5.2 SECOND REAL SITUATION HAVING MOTION OF MOBILE USER W.R.T B. S
5.3 ADAPTIVE MODULATION IN COMPLEX FADING ENVIRONMENT
CONCLUSIONS
REFERENCES
ACKNOWLEDGEMENT
本文编号：3811495
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