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　　作者為知名資 深院士，本英文版的主要內容基於作者中文著作《數字復接技術》，是作者在通信研究所數字網專業多年工作成果及相關專題講座內容的集結。

內容簡介

　　This book is a basic work specialized on modern digital communication， which consists of plesiochronous digital hierarchy， digital multiplexing principle， essential realization technology， relevant recommendations of ITU， CCITT/TSS and the application design of typical engineering project.
　　It is intended for communication engineers and technicians as well as teachers and students of the universities and colleges.

作者簡介

　　1962年畢業於清華大學，後被分配到中國電子科技集團第54研究所工作至今。其間，從事軍事通信設備研製和通信係統總體工程設計；領導創建瞭電信網絡專業和數字傢庭專業；齣版電信科技著作13部。1995年當選中國工程院院士。現任，國防電信網絡重點實驗室科技委主任；兼任，中央軍委科技委顧問。

目錄

Chapter 1　Introduction 1
1．1 DIGITAL MULTIPLEX CONCEPT 1
1．2 DIGITAL MULTIPLEX HIERARCHY 3
1．3 CCITT RECOMMENDATIONS 5
1．4 CONTENT OF THE BOOK 6
Chapter 2　Synchronous Multiplexing 7
2．1 SYNCHRONOUS MULTIPLEXING EQUIPMENT COMPOSITION 7
2．2 FRAME STRUCTURE 9
2．3 FRAME ALIGNMENT 11
2．4 SYNCHRONIZATION ACQUISITION METHOD 13
2．5 THE CODE TYPE OF FRAME ALIGNMENT SIGNALS 15
2．6 AVERAGE ACQUISITION TIME 16
2．7 OPTIMUM LENGTH OF FRAME ALIGNMENT SIGNAL 20
2．8 SYNCHROMIZATION STATUS PROTECTION 24
2．9 ACQUISITION PROCEDURE CHECKING 27
2．10 FRAME ALIGNMENT PROTECTION PARAMETERS 31
2．11 AVERAGE OUT-OF-FRAME TIME AND AVERAGE SYNCHRONIZATION TIME 34
2．12 THE BIT ERRORS OF SYNCHRONIZATION OUT-OF-FRAME 35
2．13 FRAME ALIGNMENT ACQUISITION/ MAINTENANCE LOGIC 37
2．14 GUARANTEEING THE SYNCHRONIZATION CIRCUMSTANCE 41
2．15 CCITT RECOMMENDATIONS 44
Chapter 3　Positive Justification 49
3．1 PLESIOCHRONOUS MULTIPLEX 49
3．2 PRINCIPLE OF POSITIVE JUSTIFICATION 50
3．3 BASIC FORMULA OF POSITIVE JUSTIFICATION 52
3．4 JUSTIFICATION DESIGN 54
3．5 JUSTIFICATION TRANSITION PROCESS 57
3．6 THE CHANGE RANGE OF THE READ/WRITE TIME DIFFERENCE IN A
STABLE JUSTIFICATION PROCESS 61
3．7 CLASSIFICATION OF JUSTIFICATION TRANSITION PROCESS 64
3．8 BIT RATE RECOVERY DESIGN 66
3．9 PHASE-LOCK PARAMETERS DESIGN 69
3．10 VOLTAGE CONTROLLED OSCILLATOR DESIGN 73
3．11 BUFFER SIZE 76
3．12 CCITT Recommendations 78
Chapter 4　Impairment of Positive Justification 82
4．1 STUFFING JITTER 82
4．1．1 Physical Concept of Stuffing Jitter 82
4．1．2 Signal justification process justifying only q times in p frames 84
4．1．3 Justifying q times in p frames with a residue 88
4．1．4 The relationship between the number of code justification detectors and
stuffing jitter 95
4．1．5 Distribution of stuffing jitter 99
4．2 STUFFING ERROR 104
4．2．1 Physical Concept of Stuffing Error 104
4．2．2 Calculation of stuffing error 104
4．2．3 Suppression of stuffing errors 109
Chapter 5　Positive/Negative Justification 111
5．1 THE PRINCIPLE OF POSITIVE/NEGATIVE JUSTIFICATION 111
5．2 JUSTIFICATION BY FIX ED DECISION CONTROL 113
5．3 ADAPTIVE JUSTIFICATION CONTROL 116
5．4 POSITIVE/NEGATIVE JUSTIFICATION CONTROL CIRCUIT 124
5．5 TRANSITION PROCESS OF JUSTIFICATION 126
5．6 PARAMETER DESIGN OF JUSTIFICATION 128
5．7 ENVIRONMENT DESIGN OF JUSTIFICATION 131
5．8 THE TECHNICAL APPLICATION OF THE POSITIVE/NEGATIVE
JUSTIFICATION 135
5．9 EXAMPLE OF POSITIVE/NEGATIVE JUSTIFICATION DESIGN 136
5．10 CHARACTERISTIC COMPAISON OF JUSTIFICATIONS 142
5．11 RECOMMENDATION OF CCITT 143
Chapter 6　Positive/0/Negative Justification 145
6．1 CONCEPT OF POSITIVE/0/NEGATIVE JUSTIFICATION 145
6．2 THE PRINCIPLES OF DELTA CONTROLLED POSITIVE/0/NEGATIVE
JUSTIFICATION 146
6．3 DIGITAL SMOOTH POSITIVE/0/NEGATIVE JUSTIFICATION
PRINCIPLES 147
6．4 FRAME STRUCTURE 149
6．5 JUSTIFICATION AND RECOVERY CONTROL 153
6．6 JUSTIFICATION TRANSITION PROCESS 156
6．7 DIGITAL SMOOTH 162
6．8 PULSE SMOOTHLY PRINCIPLE OF WEST GERMAN PCM30D 163
6．9 AUSTRALlA 2/8Mbit/s MULTIPLEXER PULSE SMOOTH
PRINCIPLE 166
6．10 ENGINEERING APPLICATIONS OF POSITIVE/0/NEGATIVE
JUSTIFICATION 169
Chapter 7　Measurement Techniques of Justification 170
7．1 MEASUREMENT OF STUFFING JITTER 170
7．1．1 Characteristics of stuffing jitter 170
7．1．2 Measurement range and precision requirement 172
7．1．3 Measurement equipment 173
7．1．4 Measurement method 176
7．1．5 Example of measurement 181
7．2 MEASUREMENT OF MULTIPLEX CODE ERROR 183
7．2．1 Characteristics of multiplex code error 183
7．2．2 Requirements of code error meter 184
7．2．3 Design of Special code error meter 186
7．2．4 Design of analog channel 189
7．2．5 Example of measurement 190
7．3 MEASUREMENT CHARACTERISTICS OF THE PHASE-LOCKED LOOP OF
THE CODE RECOVERY 192
7．3．1 Tracing error measurement 192
7．3．2 Measurement of jitter suppression characteristics 194
Chapter 8 Frame Adjustment Principle 195
8．1 GENERAL 195
8．2 FRAME REGULATION CATEGORIES 198
8．3 THE WORKING PRINCIPLE OF PRE-BUFFER FRAME REGUL
ATOR 199
8．4 2048kbit/s FRAME REGULATOR DESIGN 203
8．5 THE ADDITIONAL FUNCTION OF FRAME REGULATOR 210
Chapter 9 PDH/SDH Interface 211
9．1 GENERAL 211
9．2 HIGHER ORDER GROUP SDH 211
9．3 THE GENERAL ARRANGEMENT OF PDH/SDH INTERFACE 214
9．4 THE ARRANGEMENT DESIGN FOR C-4 TO ENTER STM-1 217
9．5 THE ARRANGEMENT DESIGN FOR C-3 ENTERING STM-1 221
9．6 THE ARRANGEMENT DESIGN FOR TUG ENTERING HIGH
ORDER VC 224
9．7 BASIC CONTAINER ENTERING TUG 227
9．8 STM-N MULTIPLEXING 231
9．9 PAYLOAD CONTAINER INTERFACE IN CCITT REC 234
9．10 THE IMPROVED DESIGN OF PAYLOAD CONTAINER
INTERFACE 240
Chapter 10 Anti Fading Frame Synchronization 248
10．1 THE PRINCIPLES OF ANTI FADING FRAME SYNCHRONIZATION 248
10．2 FRAME SYNCHRONIZATION AVERAGE KEEPING TIME 253
10．2．1 Scheme (1) 253
10．2．2 Scheme (2) 255
10．2．3 Scheme (3) 257
10．2．4 Scheme (4) 261
10．2．5 Scheme (5) 265
10．2．6 Scheme (6) 269
10．3 FRAME LOSS AVERAGE KEEPING TIME 273
10．3．1 Frame Loss deciding Time 273
10．3．2 Frame Synchronization Search Time 275
10．3．3 Frame Synchronization Deciding Time 278
10．3．4 Frame Synchronization Reset Delay 285
10．3．5 Frame Loss Keeping Time 286
10．4 COMPARISON OF FRAME SYNCHRONIZATION SCHEMES 286
10．4．1 Frame Synchronization Average Keeping Time 286
10．4．2 Frame Loss Average Keeping Time 289
10．4．3 The Synthetical Criterion of the Frame Synchronization System 293
Chapter 11 Engineering Application Design 296
11．1 GENERAL PLESIOCHRONOUS GROUP MULTIPLEX DESIGN 296
11．1．1 Elementary Parameters Design 296
11．1．2 Transition Process Design 300
11．1．3 Frame Loss Probability and Search Characteristics Design 300
11．1．4 Partition of the Basic Units 301
11．1．5 Design Examples 302
11．2 STANDARD/NON-STANDARD RATES TOLERANCE DESIGN 307
11．2．1 Introduction 307
11．2．2 Transmission of Non-Standard Binary Digits through Standard Channels 308
11．2．3 Design Examples 309
11．2．4 Compatible Multiplex of Different Tributary Rates 310
11．3 PLESIOCHRONOUS/SYNCHRONOUS COMPATIBLE DESIGN 313
11．3．1 Introduction 313
11．3．2 Instruction Justification Compatible method 313
11．3．3 Multiframe Fixed Control Compatible Method 316
11．4 2/34Mbit/s MULTIPLEX DESIGN 320
11．4．1 2/34Mbit/s Multiplex Scheme Comparison 320
11．4．2 Model B 2/34Mbit/s Multiplexer Design 323
11．4．3 CCITT Recommendations 329
11．5 DESIGN OF BRANCH IN GROUP TRUNK TRANSMISSION 329
11．5．1 Introduction 329
11．5．2 Trunk Branch Simplified Scheme One 331
11．5．3 Trunk Branch Simplified Scheme Two 331
11．5．4 Trunk Branch Simplified Scheme Three 332
11．5．5 Design of Branch Control Signals 335
11．5．6 Function Supplement 337
11．5．7 CCITT Recommendations 339
11．6 INTERNETWORK MULTIPLEX DESIGN 341
11．6．1 2048-6312kbit/s Interconnection Multiplex Design 341
11．6．2 44 736-139 264kbit/s Interconnection Multiplex Design 343
11．7 SUBGROUP MULTIPLEX DESIGN 346
11．7．1 Subgroup Rate Selection 346
11．7．2 Subframe Structure Arrangement 349
11．7．3 Examples of Subgroup Frame Structure Design 355
11．8 ISDN USERS/NETWORK INTERFACE MULTIPLEX DESIGN 360
11．8．1 2B+D Interface Multiplex Design 360
11．8．2 2048kbit/s Primary Interface Multiplex Design 362
11．8．3 Multiplex Design of Entering 64kbit/s Channel 363
11．8．4 Multiplex Design of X1 Rate Entering 8/16kbit/s 363
11．8．5 Design of V Rate Multiplexed into Middle Rate 366
11．9 DESIGN OF MULTIPLEX SYSTEM MAINTENANCE 371
11．9．1 Introduction 371
11．9．2 Maintenance Principles 371
11．9．3 Multiplexer Maintenance Requirements 373
11．9．4 System Consideration of Maintenance Design 375
11．9．5 Examples of Maintenance Design 376
Bibliography 382
齣集齣版後記 386
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