Efficient minimum group delay block processing approach to fractional sample rate conversion
نویسندگان
چکیده
The derivation of block-processing structures for fractional sample rate conversion (FSRC) is revisited. In the past, several timeor frequency-domain approaches [1-6] have been proposed. However, the resulting structures differ concerning their group delay and, as a consequence thereof, in the arrangement of coefficients. In this paper it is shown that a minimum extra delay of z (ML L M+1) is sufficient to ensure causality. This outcome is demonstrated both in frequencyand time-domain.
منابع مشابه
Minimal block processing approach to fractional sample rate conversion
Abstract The problem of synchronous Fractional Sample Rate Conversion (FSRC) of a digital signal by L/M, where L and M are coprime integers [3,13], is revisited. Based on a novel approach two different efficient causal block implementations of FSRC are concurrently derived and compared with each other. While the computational load of both structures, being performed in an LTI MIMO subsystem at ...
متن کاملOn Sample Rate Conversion Based on Variable Fractional Delay Filters
The sample rate conversion algorithm based on variable fractional delay filters is often used if the resampling ratio cannot be expressed as the ratio of small integer numbers or if it is not constant. The main advantage of such solution is that it allows for arbitrary resampling ratios which can even be changed during the resampling process. In this paper a discussion on influence of different...
متن کاملStructures for Interpolation, Decimation, and Nonuniform Sampling Based on Newton’s Interpolation Formula
The variable fractional-delay (FD) filter structure by Tassart and Depalle performs Lagrange interpolation in an efficient way. We point out that this structure directly corresponds to Newton’s interpolation (backward difference) formula, hence we prefer to refer to it as the Newton FD filter. This structure does not function correctly when the fractional delay is made time-variant, e.g., in sa...
متن کاملArea Efficient Fractional Sample Rate Conversion Architecture for Software Defined Radios
The modern software defined radios (SDRs) use complex signal processing algorithms to realize efficient wireless communication schemes. Several such algorithms require a specific symbol to sample ratio to be maintained. In this context the fractional rate converter (FRC) becomes a crucial block in the receiver part of SDR. The paper presents an area optimized dynamic FRC block, for low power SD...
متن کاملSignal-Flow-Graph Identities for Structural Transformations in Multirate Systems
Signal-flow-graph (SFG) transformations by means of identities are frequently used to obtain efficient structures. In contrast to timedomain approaches these transformations are graphical and therefore easier to handle. In this paper well-known noble identities [2] for multirate signal processing are revisited and extended. To this end upand downsamplers with arbitrary integer phase shifts are ...
متن کامل