spectral analysis of sequentially sampled signals for applications in information processing
نویسندگان
چکیده
this paper studies the sequential sampling scheme, as a solution to the problem of aliasing, where the sampling interval is restricted to a minimum allowable value d t. in the sequential sampling, the signal is sampled at intervals of d t, d t+ dt , d t+2 dt , d t+3 dt , ...; where dt < d t and may be selected as desirable. the sequential sampling is, however, analyzed and it is proven that, when the ratio d t/ dt is an integral number, the associated spectral estimates give a nyquist frequency 1 /2 d t . this sampling scheme can, therefore, be employed to yield a required cut-off frequency. the autocorrelation function estimation from the sequentially sampled data is then considered and the approach to this is discussed. simulation studies are also used for empirical investigations of the sequential sampling. furthermore, since with this sampling scheme no estimates of the autocorrelation coefficients are available in the initial time interval from 0 to d t, the initial autocorrelation coefficients estimation method is applied to solve this problem. this, in addition, provides some empirical studies of the latter approach. moreover, the application of the autocorrelation function extrapolation method is considered, as a means of minimizing the sampling time and costs. the contribution of the sequential sampling in obtaining a desired cut-off frequency, is also demonstrated by data simulation.
منابع مشابه
Methods for Spectral Analysis of Nonuniformly Sampled Signals
The key element of Digital Alias-free Signal Processing (DASP) technology is the application of nonuniform sampling. In this case majority of the conventional signal processing algorithms cannot be directly applied. For the implementation of DASP, a set of new approaches was developed. The paper discusses several approaches suitable for spectral analysis of nonuniformly sampled signals. These i...
متن کاملa time-series analysis of the demand for life insurance in iran
با توجه به تجزیه و تحلیل داده ها ما دریافتیم که سطح درامد و تعداد نمایندگیها باتقاضای بیمه عمر رابطه مستقیم دارند و نرخ بهره و بار تکفل با تقاضای بیمه عمر رابطه عکس دارند
Sync signal processing for asynchronously sampled video signals
Digital sync signal processing for asynchronously digitized video signals is presented. A simplified matched filter for sync extraction and a linear prediction method for sync pulse filtering improves image stability significantly in comparison with a conventional phase-locked-loop (PLL) approach. Due to the linear prediction method, additional adaption to phase skips in the input signal (non-s...
متن کاملSpectral Analysis of Sampled Signals in the Linear Canonical Transform Domain
The spectral analysis of uniform or nonuniform sampling signal is one of the hot topics in digital signal processing community. Theories and applications of uniformly and nonuniformly sampled one-dimensional or two-dimensional signals in the traditional Fourier domain have been well studied. But so far, none of the research papers focusing on the spectral analysis of sampled signals in the line...
متن کاملanalysis of power in the network society
اندیشمندان و صاحب نظران علوم اجتماعی بر این باورند که مرحله تازه ای در تاریخ جوامع بشری اغاز شده است. ویژگیهای این جامعه نو را می توان پدیده هایی از جمله اقتصاد اطلاعاتی جهانی ، هندسه متغیر شبکه ای، فرهنگ مجاز واقعی ، توسعه حیرت انگیز فناوری های دیجیتال، خدمات پیوسته و نیز فشردگی زمان و مکان برشمرد. از سوی دیگر قدرت به عنوان موضوع اصلی علم سیاست جایگاه مهمی در روابط انسانی دارد، قدرت و بازتولید...
15 صفحه اولمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
international journal of information science and managementجلد ۲، شماره ۱، صفحات ۱۳-۲۸
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023