电子料做女学 University of Electroe Scioncad TechofChina /986 Chapter 1 Introduction to Digital Signal Processing Systems Dr.Ling National Key Lab of Science and Technology on Communication
Chapter 1 Introduction to Digital Signal Processing Systems Dr. Ling National Key Lab of Science and Technology on Communication
Digital signal vs.Analog signal /96 ■Noise Noise can not be accumulated and propagated in digital signal process. DSP is insensitive to environment. ■ In analog signal process,noise is treated same as the signals. Environment affect the analog signal process significantly. ■ Store and recovery of signals Flexible and easy for digital signal storage. It is hard for analog signal storage,especially in high accuracy requirement. Always be true? 2021年2月 2
2021年2月 2 Digital signal vs. Analog signal Noise Noise can not be accumulated and propagated in digital signal process. DSP is insensitive to environment. In analog signal process, noise is treated same as the signals. Environment affect the analog signal process significantly. Store and recovery of signals Flexible and easy for digital signal storage. It is hard for analog signal storage, especially in high accuracy requirement. Always be true?
Digital signal vs.Analog signal 96 ■Signal process ■Linear transform ■Nonlinear transform ■Convert Adaptive process The current applications of analog Radio modules in communication and radar ■Power devices Industrial auto-control systems 2021年2月 3
2021年2月 3 Digital signal vs. Analog signal Signal process Linear transform Nonlinear transform Convert Adaptive process The current applications of analog Radio modules in communication and radar Power devices Industrial auto-control systems
DSP systems 956 Implementation: ■VLSI Programmable Processor DSP ■Goal: High performance with low cost Measurement of performance: Area:depends on logic gates; Execution speed:depends on throughput and clock rate; Power dissipation:static power,dynamic power; Accuracy:finite word-length in fixed-point DSP. 2021年2月 4
2021年2月 4 DSP systems Implementation: VLSI Programmable Processor DSP Goal: High performance with low cost Measurement of performance: Area: depends on logic gates; Execution speed: depends on throughput and clock rate; Power dissipation: static power, dynamic power; Accuracy: finite word-length in fixed-point DSP
1.1 Introduction /96 Distinguish DSP from other general purpose computations DSP General purpose computations Real-time throughput Samples are stored firstly and then processing them in batch Once the sample rate is met, mode. there is no advantage in making the computation any faster. Data driven Synchronized by the system clock. Once all input data are available, computations can be performed. Synchronized by the flow of data. 2021年2月 5
2021年2月 5 1.1 Introduction Distinguish DSP from other general purpose computations DSP General purpose computations Real-time throughput Once the sample rate is met, there is no advantage in making the computation any faster. Samples are stored firstly and then processing them in batch mode. Data driven Once all input data are available, computations can be performed. Synchronized by the flow of data. Synchronized by the system clock