Pub Date : 2018-08-03DOI: 10.1002/9781119470663.CH3
J. Leis
This chapter discusses common types of modulation and their variants. It explores the spectral effects of modulation and explains why certain types of modulation are used in differing situations. The chapter also explains, using mathematical notation, the operation of modulators and demodulators. It provides block diagrams of modulators and demodulators, both analog and digital, and derives the mathematical expressions for their form where appropriate. The chapter then discusses notion of phase lock and the phase‐locked loop (PLL) and Costas loops. It demonstrates the operation of multibit digital modulation using quadrature amplitude modulation (QAM) and quadrature phase shift keying (QPSK). The chapter helps the reader to understand the use of advanced modulation techniques, such as orthogonal frequency division multiplexing (OFDM), for increased digital bit rate; and spread‐spectrum (SS) techniques: direct‐sequence SS and frequency‐hopping SS.
{"title":"Modulation and Demodulation","authors":"J. Leis","doi":"10.1002/9781119470663.CH3","DOIUrl":"https://doi.org/10.1002/9781119470663.CH3","url":null,"abstract":"This chapter discusses common types of modulation and their variants. It explores the spectral effects of modulation and explains why certain types of modulation are used in differing situations. The chapter also explains, using mathematical notation, the operation of modulators and demodulators. It provides block diagrams of modulators and demodulators, both analog and digital, and derives the mathematical expressions for their form where appropriate. The chapter then discusses notion of phase lock and the phase‐locked loop (PLL) and Costas loops. It demonstrates the operation of multibit digital modulation using quadrature amplitude modulation (QAM) and quadrature phase shift keying (QPSK). The chapter helps the reader to understand the use of advanced modulation techniques, such as orthogonal frequency division multiplexing (OFDM), for increased digital bit rate; and spread‐spectrum (SS) techniques: direct‐sequence SS and frequency‐hopping SS.","PeriodicalId":419197,"journal":{"name":"Communication Systems Principles Using MATLAB®","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130475286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-03DOI: 10.1002/9781119470663.ch6
J. Leis
This chapter distinguishes between error detection and error correction. It shows calculation of the bit error probabilities for a simple channel coding scheme. The chapter helps the reader to understand the working of algorithms for block error detection and block error correction. It explains the operation of convolutional coding, including path‐search algorithms. The chapter discusses private key encryption, key‐exchange methods, and public‐key encryption. It reviews two useful concepts in modeling data transmission integrity. These are probability concepts and integer arithmetic. Calculations for data transfer integrity checking, and newer approaches to data security and encryption, depend on integer arithmetic in general and modulo arithmetic in particular. The chapter introduces the key concept of the bit error rates and relates it to the system overall, the transmitted signal power, and the external noise encountered.
{"title":"Data Transmission and Integrity","authors":"J. Leis","doi":"10.1002/9781119470663.ch6","DOIUrl":"https://doi.org/10.1002/9781119470663.ch6","url":null,"abstract":"This chapter distinguishes between error detection and error correction. It shows calculation of the bit error probabilities for a simple channel coding scheme. The chapter helps the reader to understand the working of algorithms for block error detection and block error correction. It explains the operation of convolutional coding, including path‐search algorithms. The chapter discusses private key encryption, key‐exchange methods, and public‐key encryption. It reviews two useful concepts in modeling data transmission integrity. These are probability concepts and integer arithmetic. Calculations for data transfer integrity checking, and newer approaches to data security and encryption, depend on integer arithmetic in general and modulo arithmetic in particular. The chapter introduces the key concept of the bit error rates and relates it to the system overall, the transmitted signal power, and the external noise encountered.","PeriodicalId":419197,"journal":{"name":"Communication Systems Principles Using MATLAB®","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125324271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-03DOI: 10.1002/9781119470663.ch5
J. Leis
This chapter discusses principles of scalar quantization and explains the operation of a vector quantization. It explores the principles of minimum‐redundancy code word assignment and provides the important algorithm classes for lossless. The chapter also explains several image compression approaches, including the Discrete Cosine Transform. It helps the reader to understand the basic approach to waveform and parametric speech encoding and then explains the advantages and disadvantages of each. The chapter also explores the key requirements for audio encoders and the building blocks that go to make up an audio encoding system. It reviews some of the notions of probability, which are useful in modeling errors in communication channels, as well as difference equations, which are used extensively in signal encoding. The chapter gives an overview of coding: Image Coding; Source Coding; and Speech and Audio Coding. It also discusses digital channel capacity.
{"title":"Quantization and Coding","authors":"J. Leis","doi":"10.1002/9781119470663.ch5","DOIUrl":"https://doi.org/10.1002/9781119470663.ch5","url":null,"abstract":"This chapter discusses principles of scalar quantization and explains the operation of a vector quantization. It explores the principles of minimum‐redundancy code word assignment and provides the important algorithm classes for lossless. The chapter also explains several image compression approaches, including the Discrete Cosine Transform. It helps the reader to understand the basic approach to waveform and parametric speech encoding and then explains the advantages and disadvantages of each. The chapter also explores the key requirements for audio encoders and the building blocks that go to make up an audio encoding system. It reviews some of the notions of probability, which are useful in modeling errors in communication channels, as well as difference equations, which are used extensively in signal encoding. The chapter gives an overview of coding: Image Coding; Source Coding; and Speech and Audio Coding. It also discusses digital channel capacity.","PeriodicalId":419197,"journal":{"name":"Communication Systems Principles Using MATLAB®","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125798081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-03DOI: 10.1002/9781119470663.CH2
J. Leis
This chapter deals with the basic principles of telecommunication transmission systems, which employ wired cabling, wireless or radio signals, and fiber‐optic light transmission, and explains the salient points of each approach. It helps the reader to understand the importance of frequency and bandwidth in relation to a telecommunication system. The chapter also deals with various digital line codes used for synchronization, and also explains their purpose. It discusses the nature of a transmission line and shows how standing waves are produced. The chapter explores the general principles of radio propagation, and then explains the method by which antennas transmit or receive a signal. It also explores the principles of optical communications, including light generation, propagation through optical fiber, reception, and synchronization. The chapter applies knowledge of wireless and light propagation to transmission system loss calculations.
{"title":"Wired, Wireless, and Optical Systems","authors":"J. Leis","doi":"10.1002/9781119470663.CH2","DOIUrl":"https://doi.org/10.1002/9781119470663.CH2","url":null,"abstract":"This chapter deals with the basic principles of telecommunication transmission systems, which employ wired cabling, wireless or radio signals, and fiber‐optic light transmission, and explains the salient points of each approach. It helps the reader to understand the importance of frequency and bandwidth in relation to a telecommunication system. The chapter also deals with various digital line codes used for synchronization, and also explains their purpose. It discusses the nature of a transmission line and shows how standing waves are produced. The chapter explores the general principles of radio propagation, and then explains the method by which antennas transmit or receive a signal. It also explores the principles of optical communications, including light generation, propagation through optical fiber, reception, and synchronization. The chapter applies knowledge of wireless and light propagation to transmission system loss calculations.","PeriodicalId":419197,"journal":{"name":"Communication Systems Principles Using MATLAB®","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126456504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-03DOI: 10.1002/9781119470663.index
{"title":"Index","authors":"","doi":"10.1002/9781119470663.index","DOIUrl":"https://doi.org/10.1002/9781119470663.index","url":null,"abstract":"","PeriodicalId":419197,"journal":{"name":"Communication Systems Principles Using MATLAB®","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122198097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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