A reconfigurable multi-standard channelizer using qmf trees for software radio receivers

Vinod, A. P.; Lai, Eseng; Premkumar, A.B.; Lau, Chiew Tong

doi:10.1109/pimrc.2003.1264244

Cited by 25 publications

(44 citation statements)

References 8 publications

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“…They are widely used to implement 1-D and 2-D discrete wavelet transforms. Figure 5(c) shows a tree-structure filter bank with equal pass bandwidth, which can be used to implement re-configurable channelizer for software defined radio receivers [11].…”

Section: Types Of Filter Bank Consideredmentioning

confidence: 99%

Moduli Set Selection and Cost Estimation for RNS-Based FIR Filter and Filter Bank Design

Liu

Lai

2004

Des Autom Embed Syst

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Moduli selection is one of the most important issues in the implementation of systems that make use of residue number systems. In this paper, we describe a software tool that assists system designers in moduli selection for the design of RNS-based FIR filters and filter banks. According to some filter specification parameters, the software tool constructs valid moduli sets and calculates their estimated implementations cost in terms of delay, area and power consumption based on results obtained in logic synthesis. Moduli set that is most suitable for the user requirements is selected, together with the estimated cost, to be the output. Outputs of the software tool also indicate that certain level of trade-off among delay, area and power consumption exists for the RNS-based filter and filter bank implementation by using different moduli sets.

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Section: Types Of Filter Bank Consideredmentioning

confidence: 99%

Moduli Set Selection and Cost Estimation for RNS-Based FIR Filter and Filter Bank Design

Liu

Lai

2004

Des Autom Embed Syst

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“…Several approaches are proposed in literature for the efficient implementation of these filter banks (FBs) [3][4][5][6][7][8][9]. The per-channel (PC) approach employs an independent channel filter for each channel.…”

Section: Introductionmentioning

confidence: 99%

“…In TPFT, two levels of tuning are done, a coarse tuning at the PFT level and a fine tuning using another complex up/down converter assisted by a numerically controlled oscillator [8]. A reconfigurable channelizer using tree-structured quadrature mirror filter bank (TQMFB) has been proposed in [9]. The TQMFB consisted of a tree of quadrature mirror filter banks, splitting the frequency band of input signal into high and low frequencies at quadrature frequency in each stage.…”

Section: Introductionmentioning

confidence: 99%

“…The TQMFB consisted of a tree of quadrature mirror filter banks, splitting the frequency band of input signal into high and low frequencies at quadrature frequency in each stage. The channelizers in [8] and [9] suffer from the drawback that they can only extract signals whose channel spacing are related by a factor-of-two. This constraint is imposed by the power-of-two subband stacking adopted in these architectures.…”

Section: Introductionmentioning

confidence: 99%

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An Area-efficient Non-uniform Filter Bank for Low Overhead Reconfiguration of Multi-standard Software Radio Channelizers

Mahesh

Vinod

2010

J Sign Process Syst

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The channelizer in a software defined radio (SDR) base station extracts individual radio channels from the digitized wideband input signal at a very high sampling rate. The base station channelizer must be able to simultaneously extract multiple channels of non-uniform bandwidths corresponding to channel bandwidths of different communication standards. Reconfigurability and low complexity are the two key requirements in the SDR channelizer. A new reconfigurable filter bank (FB) architecture based on interpolation and masking technique for SDR channelizers is proposed in this paper. The proposed FB can be used for obtaining very narrow passband channels with extremely low complexity. Using a cascaded structure of the proposed FB, it is possible to extract channels of fractional passband widths by changing the interpolation factor. Design example shows that the proposed FB offers complexity reduction of 84% over the conventional per-channel (PC) approach. The proposed FB has been implemented and tested on Xilinx Virtex 2v3000ff1152-4 FPGA. Implementation results show that the proposed FB offers area reduction of 48.37%, speed improvement of 52.7% and power reduction of 75.9% over the PC approach.

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“…If every subband signal is equal-bandwidth but has arbitrary location in the IF bandwidth, an efficient architecture based on the Goertzel algorithm filter banks can be used [9]. As for the subband signals with nonequal bandwidths and arbitrary locations, the method based on the digital down converter (DDC) is commonly chosen [4,9].In some cases, the cascaded or tree-structured filter banks can also be used [10,11].…”

Section: Introductionmentioning

confidence: 99%

Efficient dynamic channeliser based on nonuniform filter banks

Li¹,

Lin-dong²,

Zheng³

2007

Trans Emerging Tel Tech

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SUMMARYIn the multi-standard communications systems, the intermediate frequency (IF) signal usually consists of several subband signals with nonequal bandwidths and arbitrary band locations, and in some special cases the number, location and bandwidth of the subband signal are dynamically changeable during receiving. This paper presents an efficient architecture based on nonuniform filter banks to channelise these signals. The nonuniform filter bank can be constructed by directly merging the relevant uniform cosine-modulated filter bank (CMFB) according to the nonuniform matrix. The whole filter design can be boiled down to design a prototype filter that meets some constraints. The proposed structure can be optimised to reduce the computational complexity using the relationships among different decimation factors of different subband signals. Along with signals dynamically changing, new channelisation can be implemented as long as updating the nonuniform matrix. New structure is provided with low cost in hardware and high flexibility. Simulation results are also presented to illustrate its feasibility.

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A reconfigurable multi-standard channelizer using qmf trees for software radio receivers

Cited by 25 publications

References 8 publications

Moduli Set Selection and Cost Estimation for RNS-Based FIR Filter and Filter Bank Design

Moduli Set Selection and Cost Estimation for RNS-Based FIR Filter and Filter Bank Design

An Area-efficient Non-uniform Filter Bank for Low Overhead Reconfiguration of Multi-standard Software Radio Channelizers

Efficient dynamic channeliser based on nonuniform filter banks

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