Decimation by irrational factor using CIC filter and linear interpolation

Babić, Djordje; Vesma, J.; Renfors, Markku

doi:10.1109/icassp.2001.940640

Cited by 24 publications

(10 citation statements)

References 1 publication

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“…However, the implementation complexity may still be rather significant. An alternative fractional sampling rate conversion scheme working at the beginning of the decimation chain has been presented in Reference [59], and another approach was recently proposed in Reference [60].…”

Section: Fractional Sampling Rate Conversionmentioning

confidence: 99%

Signal processing challenges for applying software radio principles in future wireless terminals: an overview

Valkama

Pirskanen

Renfors

2002

Int J Communication

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SUMMARYThe general idea of software radio is to develop highly integrated radio transceiver structures with high degree of flexibility and multimode capabilities, achieved through increased role of digital signal processing software in defining the functionalities which have traditionally been implemented with analog RF techniques. This paper explores the software radio concept from the receiver architecture and signal processing points of view, with mainly the wireless terminal application in mind. We first discuss the critical issues in alternative receiver architectures with simplified analog parts and increased configurability. We also introduce certain advanced digital signal processing techniques which could potentially relieve some of the essential problems and pave the way towards DSP-based, highly integrated, and highly configurable terminals. Big emphasis is on efficient digital multirate signal processing methods and complex (I/Q) signal processing.

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Section: Fractional Sampling Rate Conversionmentioning

confidence: 99%

Signal processing challenges for applying software radio principles in future wireless terminals: an overview

Valkama

Pirskanen

Renfors

2002

Int J Communication

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“…International Journal of Electronics filtering, mixing and complex to real conversion for the analogue IF output. The high-quality clock source provides sample timing to the DAC and a digital clock to the DUC (Babic, Vesma and Renfors 2001;Babic and Renfors 2005). The analogue IF output from the DAC is filtered and amplified.…”

Section: Interpolators Implementationmentioning

confidence: 99%

Performance comparison of quadrature amplitude modulation (QAM)-based single- and double-stage digital interpolators

Ratan

Sharma

Kohli

2013

International Journal of Electronics

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In this article, the performance of quadrature amplitude modulation (QAM)-based single-and double-stage digital interpolators have been compared. The basic interpolator for up-sampling can be a combination of an expander unit with an interpolation lowpass filter in cascade. Complicated implementations can be done by connecting multiple expander and low-pass filter pairs in cascade. This article presents the efficient and effective implementation of digital interpolation systems for up-sampling of single-and double-stage digital interpolators. Comparison is done in terms of spectrum of generated signal, envelope power, modulated signal trajectory, input and output constellation and noise performance. In this article, the proposed interpolation filters have been simulated in Agilent's Advanced Design System (ADS).

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“…Among them, polynomial-based filters are generally assumed to provide an efficient implementation form directly in digital domain. Such filters witness an effective implementation through Farrow structure or its higher version [8]- [13]. The main advantage of the Farrow structure is based on the presence of fixed finite-impulse response (FIR) filters as one of its ingredients.…”

Section: F Filters With Non Integer Decimation Factor: Farrow Filtersmentioning

confidence: 99%

“…However, in many cases, it becomes more efficient to use cascaded structures engineered by the modification of the Farrow structure and fixed FIR, or multistage FIR filter [12], [13]. The main advantage of using the cascaded structures instead of the direct modification of the Farrow structure lies in the fact that in case of joint optimization of the two building blocks the computational complexity to generate practically the same filtering performance is dramatically reduced.…”

Section: F Filters With Non Integer Decimation Factor: Farrow Filtersmentioning

confidence: 99%

Efficient Implementation of Sample Rate Converter

Singh¹,

Patterh²,

Sharma³

2010

IJACSA

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Abstract-Within wireless base station system design, manufacturers continue to seek ways to add value and performance while increasing differentiation. Transmit/receive functionality has become an area of focus as designers attempt to address the need to move data from very high frequency sample rates to chip processing rates. Digital Up Converter (DUC) and Digital Down Converter (DDC) are used as sample rate converters. These are the important block in every digital communication system; hence there is a need for effective implementation of sample rate converter so that cost can be reduced. With the recent advances in FPGA technology, the more complex devices providing high-speed as required in DSP applications are available. The filter implementation in FPGA, utilizing the dedicated hardware resources can effectively achieve application-specific integrated circuit (ASIC)-like performance while reducing development time cost and risks. So in this paper the technique for an efficient design of DDC for reducing sample rate is being suggested which meets the specifications of WiMAX system. Its effective implementation also ensures the pathway for the efficient applications in VLSI designs. Different design configurations for the sample rate converter are explored. The sample rate converter can be designed using half band filters, fixed FIR filters, poly-phase filters, CIC filters or even farrow filters.

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Decimation by irrational factor using CIC filter and linear interpolation

Cited by 24 publications

References 1 publication

Signal processing challenges for applying software radio principles in future wireless terminals: an overview

Signal processing challenges for applying software radio principles in future wireless terminals: an overview

Performance comparison of quadrature amplitude modulation (QAM)-based single- and double-stage digital interpolators

Efficient Implementation of Sample Rate Converter

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