real time operating system applications examples

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... input sequence is very long compared to the order of FIR filter L. This is especially true in real- time applications where the input sequence is of infinite duration. In order to use the efficient ... algorithm. There are two classes of FFT algorithms: decimation-in -time and decimation-in- frequency. In the decimation-in -time algorithm, the input time sequence is successively divided up into smaller sequences, ... samples of data. The execution time of the fft function depends on the input data type and the sequence length. If the input data is real- valued, it computes a real power-of-two FFT algorithm...

Ngày tải lên: 28/10/2013, 05:15

... of communication systems. In this chapter, we will introduce some selected DSP applica- tions in communications that played an important role in the realization of the systems. 9.1 Sinewave Generators and Applications When ... tab_0_PI .sect "cos_sin" SINEWAVE GENERATORS AND APPLICATIONS 401 9 Practical DSP Applications in Communications There are many DSP applications that are used in our daily lives, some of ... wireless communica- tion system is illustrated in Figure 9.22. The system can be divided into three sections: transmitter, receiver, and the communication channel. The system can also be distin- guished...

Ngày tải lên: 06/11/2013, 18:15

... discrete -time linear time- invariant system. Let x(n) be the input sequence and y(n) be the output sequence of the system. If h(n) is the impulse response of the system, the output signal of the system ... xn); title( `Time- domain signal x(n)'); xlabel( `Time index'); ylabel(`Amplitude'); where title gives the plot with the title `Time- domain signal x(n)', xlabel labels the x-axis with `Time ... FOR DSP APPLICATIONS Appendix B Introduction of MATLAB for DSP Applications MATLAB (MATrix LABoratory) is an interactive technical computing environment for scientific and engineering applications. ...

Ngày tải lên: 25/01/2014, 19:20

... DSP run -time environment, and the host environment. In this section, we will present the data types that are used by the TMS320C55x C compiler. The C55x is designed for real- time DSP applications. ... typing firfltr infile coefile outfile <enter> The operating system passes the strings on the command line to main. More precisely, the operating system stores the strings on the command line in ... for different data types may vary from system to system. For example, in a workstation, the value of sizeof(int)is 4 (bytes), whereas on fixed-point DSP systems, the value of sizeof(int)is typically...

Ngày tải lên: 25/01/2014, 19:20

... model certain class of real- time systems like a biphase mark protocol [31]. The Alur-Dill timed automata framework [1] is arguably the best known framework to model a real- time system, and is the ... exclusion algorithm. 1 Introduction In a typical real- time system, timing constraints on the system s behavior are used to ensure its correctness. Such a system is often modeled by using a set of timing ... parametric safety verification of real- time systems in which “correct orderings of events” needed for system correctness are maintained by timing constraints on the systems’ behavior. By using EOA,...

Ngày tải lên: 07/03/2014, 17:20

... infrastructure and sentiment model to analyze in real- time public sentiment on Twitter toward the 2012 U.S. presidential candidates. Our effort to gauge political sentiment is based on bringing ... visualization modules and assemble them into a real- time processing pipeline. Streams applications are highly scalable so we can adjust our system to handle higher volume of data by adding ... desirable. Figure 1 shows our system s architecture and its modules. Next, we introduce our data source and each individual module. Figure 1. The system architecture for real- time processing Twitter...

Ngày tải lên: 16/03/2014, 20:20

... ordering also supports logarithmic -time insertion and deletion. Unfortunately, real- time en- gines sometimes have performance penalties because of the overhead of STL, both in time and memory. 31 TeamLRN ... idle time because it is not processing messages. The idle loop is where you need to place your rendering code in order to obtain real- time frame rates. Trying to render at a fixed rate through a system timer ... fixed rate through a system timer is typically not sufficient because the timers tend to be of limited resolution. For example, the WM_TIMER message is generated about 18 times per second, so you...

Ngày tải lên: 04/06/2014, 11:53

... Admire System. As is shown in Figures 1 and 2, the Admire (ADvanced Multimedia Interactive Real- time Environment) system [2, 6, 7] is a heterogeneous wireless network-oriented large-scale multimedia ... media data and real- time requirements of multimedia applications [1]. How to maintain the security of media data becomes a challenge task [1, 8, 9]. To solve this problem, a lot of multimedia (e.g., ... of SAME is effective enough to support real- time applications. The rest of the paper is org anized as follows. Section 2 presents the overview of AdmireRPS system and its security problems. The...

Ngày tải lên: 21/06/2014, 11:20

... i.e., the total time to process the image of an eye with 136 ì 82 pixels in this system is 136 à s. This is a hardware implementation of an eye state recognition for real time. Competing ... implementation method have a high speed and accuracy. Therefore, our proposed system can be used in real- time applications. Conclusion Figure 2 platform. The accuracy of the algorithm ... drowsiness warning system based on the fuzzy logic images analysis. Expert Syst. Appl. 34(2), 1556–1561 (2008) 13. Y Lei, M Yuan, X Song, X Liu, J Ouyang, Recognition of eye states in real time video,...

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Ngày tải lên: 14/11/2014, 06:51

... University Pittsburgh, PA 15213 Appeared in Proceedings of the 11th Operating Systems Principles, November, 1987 Abstract Mach is a multiprocessor operating system being implemented at Carnegie-Mellon University. ... Collins and L.W. Loen. System/ 38 Machine Storage Management. IBM System/ 38 Technical Developments, IBM General Systems Division :63-66, 1978. [7] Gupta, A. Parallel Production Systems. PhD thesis, ... November, 1984. [9] Kahn, K.C. et al. iMAX: A Multiprocessor Operating System for an Object-Based Computer. In Proc. 8th Symposium on Operating Systems Principles, pages 127-136. ACM, December, 1981. [10]...

Ngày tải lên: 12/09/2012, 15:05