Analysis and Design of Efficient and Flexible Fast-Convolution Based Multirate Filter Banks

Renfors, Markku; Yli‐Kaakinen, Juha; Harris, F. J.

doi:10.1109/tsp.2014.2330331

Cited by 72 publications

(45 citation statements)

References 24 publications

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“…In addition, it also achieves comparable OoB emission as FBMC systems [5], [6], [7], [17]. Note that a fast-convolution implementation of multirate filter bank based waveform has been implemented and analyzed by transforming the filtering operation into the fast Fourier transform (FFT) domain [18], [19], with filtered cyclic prefix (CP) OFDM as a special case [20].…”

Section: Introductionmentioning

confidence: 99%

Subband Filtered Multi-Carrier Systems for Multi-Service Wireless Communications

Zhang

Ijaz

Xiao

et al. 2017

IEEE Trans. Wireless Commun.

122

114

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Abstract-Flexibly supporting multiple services, each with different communication requirements and frame structure, has been identified as one of the most significant and promising characteristics of next generation and beyond wireless communication systems. However, integrating multiple frame structures with different subcarrier spacing in one radio carrier may result in significant inter-service-band-interference (ISBI). In this paper, a framework for multi-service (MS) systems is established based on subband filtered multi-carrier system. The subband filtering implementations and both asynchronous and generalized synchronous (GS) MS subband filtered multi-carrier (SFMC) systems have been proposed. Based on the GS-MS-SFMC system, the system model with ISBI is derived and a number of properties on ISBI are given. In addition, low-complexity ISBI cancelation algorithms are proposed by precoding the information symbols at the transmitter. For asynchronous MS-SFMC system in the presence of transceiver imperfections including carrier frequency offset, timing offset and phase noise, a complete analytical system model is established in terms of desired signal, intersymbol-interference, inter-carrier-interference, ISBI and noise. Thereafter, new channel equalization algorithms are proposed by considering the errors and imperfections. Numerical analysis shows that the analytical results match the simulation results, and the proposed ISBI cancelation and equalization algorithms can significantly improve the system performance in comparison with the existing algorithms.Index Terms-multi-service multi-carrier system, inter-serviceband-interference, universal filtered multi-carrier, subband filtered multi-carrier, transceiver imperfection, generalized synchronization

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Section: Introductionmentioning

confidence: 99%

Subband Filtered Multi-Carrier Systems for Multi-Service Wireless Communications

Zhang

Ijaz

Xiao

et al. 2017

IEEE Trans. Wireless Commun.

122

114

View full text Add to dashboard Cite

show abstract

“…However, it is quite complicated to implement such a scheme using the traditional time-domain polyphase filter bank techniques, even for simulation based testing of the idea. This paper uses a special implementation scheme for multirate filters and filter banks which is based on fast-convolution (FC) processing [15], [16], [17]. The main idea of FC is that a high-order filter can be implemented effectively through multiplication in frequency-domain, after taking DFTs of the input sequence and the filter impulse response.…”

Section: Generation Of Overlapping Fmtmentioning

confidence: 99%

“…In practice, efficient implementation techniques, like FFT/IFFT, are used for the transforms, and overlap-save processing is applied for processing long sequences. The application of FC to multicarrier waveform processing was presented in [16], and the authors have introduced the idea of FC-implementation of FMT systems in [17] as well.…”

Section: Generation Of Overlapping Fmtmentioning

confidence: 99%

“…However, using the optimization methods presented in [16], it possible to enhance the performance of RRC-type filters for FMT. This has an effect on the inband interference within each subcarrier and ICI between subcarriers.…”

Section: Generation Of Overlapping Fmtmentioning

confidence: 99%

“…This compromises the orthogonality but improves spectrum efficiency with reasonable values of roll-off and filter order. We present a flexible and effective scheme for implementing FMT with overlapping subchannels (O-FMT) based on the fast-convolution (FC) processing, which has recently been introduced in the waveform processing context [15], [16]. In Section II we develop an analytical model for ICI as a function of subchannel overlap and roll-off.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Filtered multitone multicarrier modulation with partially overlapping sub-channels

Shao

Yli‐Kaakinen

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

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Abstract-Future wireless networks demand multicarrier modulation schemes with improved spectrum efficiency and superior spectrum containment. Orthogonal frequency division multiplexing (OFDM) has been the favorite technique in recent developments, but due to its limited spectrum containment, various alternative schemes are under consideration for future systems. Theoretically, it is not possible to reach maximum spectrum efficiency, high spectral containment, and orthogonality of subcarriers simultaneously, when using quadrature amplitude modulation (QAM) for subcarriers. This has motivated the study of non-orthogonal multicarrier modulation schemes. This paper focuses on the filtered multitone (FMT) scheme, one of the classical configurations of filter bank multicarrier (FBMC) modulation utilizing QAM subcarrier symbols. Our main aim is to improve the spectral efficiency of FMT by introducing controlled overlap of adjacent subchannels. An analytical model is developed for evaluating the tradeoffs between spectrum efficiency and intercarrier interference (ICI) introduced by the overlap. An efficient fast convolution waveform processing scheme is adopted for the generation of the proposed waveform. It allows effective adjustment of the roll-off and subcarrier spacing to facilitate waveform adaptation in real time. Analytical studies, confirmed by simulation results, indicate that the proposed FMT system can obtain significant spectral density improvement without requiring additional ICI cancellation techniques.

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Filtered Multicarrier Transmission

2020

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Orthogonal frequency‐division multiplexing (OFDM) has been adopted as the waveform of choice in the existing and emerging broadband wireless communication systems for a number of advantages it can offer. Nevertheless, investigations of more advanced multicarrier transmission schemes have continued with the aim of eliminating or mitigating its essential limitations. This article discusses multicarrier schemes with enhanced spectrum localization, which manage to reduce the spectral sidelobes of plain OFDM that are problematic in various advanced communication scenarios. These include schemes for enhancing the OFDM waveform characteristics through additional signal processing as well as filter‐bank multicarrier (FBMC) waveforms utilizing frequency‐selective filter banks instead of plain (inverse) discrete Fourier transform processing for waveform generation and demodulation.

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Analysis and Design of Efficient and Flexible Fast-Convolution Based Multirate Filter Banks

Cited by 72 publications

References 24 publications

Subband Filtered Multi-Carrier Systems for Multi-Service Wireless Communications

Subband Filtered Multi-Carrier Systems for Multi-Service Wireless Communications

Filtered multitone multicarrier modulation with partially overlapping sub-channels

Filtered Multicarrier Transmission

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