Unified FRM‐based complex modulated filter bank structure with low complexity

Zhang, Wenxu; Du, Qiuying; Ji, Qingbo; Chen, Tao

doi:10.1049/el.2017.3244

Cited by 13 publications

(4 citation statements)

References 7 publications

(7 reference statements)

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“…It can be seen from Table 1 that the number of multipliers required by the method proposed in this paper is 96.75% lower than that of the basic low-pass structure, and 49.26% and 24.88% lower than that of the polyphase structure and [17], respectively. Although the proposed structure is 56.73% and 16.22% higher than the number of multipliers required by [24] and [31], respectively, we can see that in terms of group delay, this method is much less than [24] and [31], especially 93.38% less than [31]. Although it is more than based on polyphase structure, it is only a little more.…”

Section: B Complexity Analysis and Comparisonsmentioning

confidence: 81%

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

et al. 2019

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The main application of the filter bank in radar signal processing is the wideband digital channelized receiver. In order to save hardware resources of the field programmable gate array (FPGA), the efficient channelized receiver structure using polyphase filter has been designed. However, when the number of channels is greatly increased or the transition bandwidth of the filter bank (FB) becomes very narrow, it still consumes large amounts of hardware resources. Therefore, a novel efficient channelized receiver structure based on frequency response masking (FRM) and modulation filter bank is proposed in this paper. The proposed novel structure has less computational complexity in implementing FB with narrow transition bandwidth (NTB). Compared with other efficient FRM-based structures, the proposed novel structure is more suitable for wideband digital channelization receiver. The proposed novel structure is verified correctly by Matlab simulation. The FPGA implementation of the polyphase channelized receiver structure and the proposed novel efficient FRM-based channelized receiver structure are completed by Xilinx System Generator. The result shows that the proposed novel efficient FRM-based channelized receiver structure can save 48.09% of the DSP48E1 hardware resources compared with the polyphase channelized receiver structure and has low group delay characteristic. INDEX TERMS Frequency response masking, narrow transition bandwidth, channelized receiver, field programmable gate array. II. REVIEW OF POLYPHASE STRUCTURE FOR CHANNELIZED RECEIVER A. MODULATION FILTER BANK

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Section: B Complexity Analysis and Comparisonsmentioning

confidence: 81%

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

et al. 2019

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“…From (6), it can be deduced that for large values of L, higher-order sharp masking filters will be required due to the denser replicas in the even and odd BES-FB. To overcome this difficulty, the masking filters are implemented using a simpler variant of FRM, called interpolated FIR (IFIR) technique (18).…”

Section: Modified Frm Filter Bank Based On Alternate Masking Schemementioning

confidence: 99%

“…As per Equation (4), m is calculated as 3. The filter specifications for the masking filters are calculated using (6) and is given in Table IV. Subsequently, using Equations ( 8) to (11), the specifications of IFIR modal filter and the image-suppressor filter for the masking filters are determined for the optimum interpolation factor, L IF IR and are given in Table V and VI.…”

Section: Proposed Design Of Multiplier-less Modfrm-fbmentioning

confidence: 99%

Low Complexity Multiplier-less Modified FRM Filter Bank using MPGBP Algorithm

Parvathi,

Sakthivel

2022

International Journal of Electronics and Telecommunications

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The design of a low complexity multiplier-less narrow transition band filter bank for the channelizer of multistandard software-defined radio (SDR) is investigated in this paper. To accomplish this, the modal filter and complementary filter in the upper and lower branches of the conventional Frequency Response Masking (FRM) architecture are replaced with two power-complementary and linear phase filter banks. Secondly, a new masking strategy is proposed to fully exploit the potential of the numerous spectra replicas produced by the interpolation of the modal filter, which was previously ignored in the existing FRM design. In this scheme, the two masking filters are appropriately modulated and alternately masked over the spectra replicas from 0 to 2π, to generate even and odd channels. This Alternate Masking Scheme (AMS) increases the potency of the Modified FRM (ModFRM) architecture for the design of computationally efficient narrow transition band uniform filter bank (termed as ModFRM-FB). Finally, by combining the adjoining ModFRM-FB channels, Non-Uniform ModFRM-FB (NUModFRM-FB) for extracting different communication standards in the SDR channelizer is created. To reduce the total power consumption of the architecture, the coefficients of the proposed system are made multiplier-less using Matching Pursuits Generalized Bit-Planes (MPGBP) algorithm. In this method, filter coefficients are successively approximated using a dictionary of vectors to give a sum-of-power-of-two (SOPOT) representation. In comparison to all other general optimization techniques, such as genetic algorithms, the suggested design method stands out for its ease of implementation, requiring no sophisticated optimization or exhaustive search schemes. Another notable feature of the suggested approach is that, in comparison to existing methods, the design time for approximation has been greatly reduced. To further bring down the complexity, adders are reused in recurrent SOPOT terms using the Common Subexpression Elimination (CSE) technique without compromising the filter performance.Keywords-Frequency response masking (FRM), Modified FRM filter bank (ModFRM-FB), Multiplier-less filter, Matching pursuits with generalized bit planes (MPGBP), Sum-of-power-oftwo (SOPOT), Common sub-expression elimination (CSE)

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“…Although the complexity can be reduced, no one has applied it to the polyphase inverse discrete Fourier transform (IDFT) channelised structure. A unified FRM‐based complex‐modulated FB structure with low complexity was proposed in [15]. The proposed structure can reduce the implementation complexity and be applied to wideband systems.…”

Section: Introductionmentioning

confidence: 99%

Design of a novel CEM‐FRM‐based low‐complexity channelised radar transmitter

Zhang

Cui

et al. 2021

IET Radar Sonar & Navi

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With the development of the radar technology, it is required that a radar has wider bandwidth and can transmit multiple signals simultaneously. The polyphase digital channelised transmitter structure can transmit multiple signals simultaneously and increase the bandwidth of the output signal. However, in order to reduce the frequency aliasing and improve the spectrum utilisation, the prototype filter needs to have sharp transition bandwidth. The design of the prototype filter directly affects the performance of the radar transmitter. Using the complex-exponential modulation frequency-response masking (CEM-FRM) approach to design the prototype filter can obtain both sharp transition bandwidth and low complexity. The application of a polyphase structure can further reduce the complexity of the filter bank and make the sampling rate of the output signal several times the field programmable gate array operating frequency. The proposed CEM-FRM-based low complexity polyphase channelised radar transmitter is verified by MATLAB simulation and the theoretical complexity of the proposed CEM-FRM-based channelised radar transmitter structure is compared with other methods.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Unified FRM‐based complex modulated filter bank structure with low complexity

Cited by 13 publications

References 7 publications

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

Low Complexity Multiplier-less Modified FRM Filter Bank using MPGBP Algorithm

Design of a novel CEM‐FRM‐based low‐complexity channelised radar transmitter

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