Nonuniform sampling driver design for optimal ADC utilization
نویسندگان
چکیده
Deliberate nonuniform sampling promises increased equivalent sampling rates with reduced overall hardware costs of the DSP system. The equivalent sampling rate is the sampling rate that a uniform sampling device would require in order to achieve the same processing bandwidth. Equivalent bandwidths of realizable systems may well extend into the GHz range while the mean sampling rate stays in the MHz range. Current prototype systems (IECS) have an equivalent bandwidth of 1.6GHz at a mean sampling rate of 80MHz, achieving 40 times the bandwidth of a classic DSP system that would operate uniformly at 80MHz (cf. [1]). Throughout the literature on nonuniform sampling (e. g. [2] and [3]) different sampling schemes have been investigated. This paper focuses on nonuniform sampling schemes optimized for fast and efficient hardware implementations. To our knowledge this is the first proposal of an efficient nonuniform sampling driver (SD) design in the open literature.
منابع مشابه
Scalable VHDL Architectures for Non-uniform Sampling Driver Designs
Non-uniform sampling promises increased equivalent sampling rates with reduced overall hardware costs. Each device applying non-uniform sampling must use special circuits and architectures to achieve a correct and predictable sampling scheme with respect to time instant placement. The architecture of an ASIC implementation for non-uniform sampling varies with the application. Different boundary...
متن کاملEFFICIENT RECONSTRUCTION OF TWO-PERIODIC NONUNIFORMLY SAMPLED SIGNALS APPLICABLE TO TIME-INTERLEAVED ADCs
Nonuniform sampling occurs in many practical applications either intentionally or unintentionally. This thesis deals with the reconstruction of two-periodic nonuniform signals which is of great importance in two-channel timeinterleaved analog-to-digital converters. In a two-channel time-interleaved ADC, aperture delay mismatch between the channels gives rise to a two-periodic nonuniform samplin...
متن کاملOptimal sampling functions in nonuniform sampling driver designs to overcome the Nyquist limit
In some applications the observed samples are inherently nonuniform. In contrast to that in this paper we take advantage of deliberate nonuniform sampling and perform DSP where the classical approaches leave off. For instance think about mobile communication or digital radio. Deliberate nonuniform sampling promises increased equivalent sampling rates with reduced overall hardware costs. The equ...
متن کاملOptimal sub-Nyquist nonuniform sampling and reconstruction for multiband signals
We study the problem of optimal sub-Nyquist sampling for perfect reconstruction of multiband signals. The signals are assumed to have a known spectral support that does not tile under translation. Such signals admit perfect reconstruction from periodic nonuniform sampling at rates approaching Landau’s lower bound equal to the measure of . For signals with sparse , this rate can be much smaller ...
متن کاملReconstruction of Periodically Nonuniformly Sampled Bandlimited Signals Using Time-varying Fir Filters
This paper deals with reconstruction of nonuniformly sampled bandlimited continuous-time signals using time-varying discrete-time FIR filters. The point of departure is a representation of the reconstructed sequence that utilizes a time-frequency function. This representation enables a proper utilization of the slight oversampling that is assumed and reduces the reconstruction problem to a desi...
متن کامل