Low-power equalizer architectures for high speed modems

Azadet, K.; Nicole, C.J.

doi:10.1109/35.722147

Cited by 37 publications

(12 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The finite impulse response (FIR) filters can be implemented using two well-known canonical forms, called the direct and transposed forms [1]. Figure 3 presents fourtap FIR filters that are functionally equivalent, when the coefficients w j have a fixed value.…”

Section: Parallel Fir Filtersmentioning

confidence: 99%

“…3(a)) is limited by the critical path corresponding to the longest computation time among all paths that contain zero delays. The critical path is an increasing function of the number of taps, and at the same time needs to be less than a clock period [1]. It is defined by τ cp = τ m + (N − 1)τ a , where τ m and τ a are the time needed for one multiplication and one addition, respectively, and N is the number of taps.…”

Section: Parallel Fir Filtersmentioning

confidence: 99%

“…In this case, the critical path is reduced to a single multiply-accumulate operation, τ cp = τ m + τ a . However, this form suffers from significant fan-in to apply simultaneously the input data signal to all taps of the filter [1]. Figure 4 presents the canonical realizations of a four-tap adaptive FIR filter based on the LMS algorithm to adjust its coefficients [13].…”

Section: Parallel Fir Filtersmentioning

confidence: 99%

See 2 more Smart Citations

FPGA-Implementation of Parallel and Sequential Architectures for Adaptive Noise Cancelation

Bahoura

Ezzaidi

2011

Circuits Syst Signal Process

View full text Add to dashboard Cite

This paper presents a FPGA-based rapid prototyping of an adaptive noise canceller (ANC) using XUP Virtex-II Pro development board and Xilinx System Generator. New parallel and sequential architectures of the ANC are proposed and successfully applied to remove noise from electrocardiogram and speech signals. The pipelined architecture were evaluated and compared to existing high-speed systems using objective measurement tests. By providing comparable filtering performances that of the parallel architectures, the proposed sequential system required fewer material resources.

show abstract

Section: Parallel Fir Filtersmentioning

confidence: 99%

Section: Parallel Fir Filtersmentioning

confidence: 99%

Section: Parallel Fir Filtersmentioning

confidence: 99%

See 1 more Smart Citation

FPGA-Implementation of Parallel and Sequential Architectures for Adaptive Noise Cancelation

Bahoura

Ezzaidi

2011

Circuits Syst Signal Process

View full text Add to dashboard Cite

show abstract

“…At low speed, transversal equalizers can be implemented as digital finite-impulse response (FIR) filters: the input signal is first sampled and digitized, and the delay line can be constructed using a shift register [17] or memory [18]. The maximum data rate of digital FIR filters is limited by the speed of the digitizer and the power consumption and circuit complexity required for the high-speed implementation.…”

Section: A Transversal Equalizermentioning

confidence: 99%

Integrated transversal equalizers in high-speed fiber-optic systems

Tierno

Pepeljugoski

et al. 2003

IEEE J. Solid-State Circuits

125

View full text Add to dashboard Cite

Abstract-Intersymbol interference (ISI) caused by intermodal dispersion in multimode fibers is the major limiting factor in the achievable data rate or transmission distance in high-speed multimode fiber-optic links for local area networks applications. Compared with optical-domain and other electrical-domain dispersion compensation methods, equalization with transversal filters based on distributed circuit techniques presents a cost-effective and lowpower solution. The design of integrated distributed transversal equalizers is described in detail with focus on delay lines and gain stages. This seven-tap distributed transversal equalizer prototype has been implemented in a commercial 0.18-m SiGe BiCMOS process for 10-Gb/s multimode fiber-optic links. A seven-tap distributed transversal equalizer reduces the ISI of a 10-Gb/s signal after 800 m of 50-m multimode fiber from 5 to 1.38 dB, and improves the bit-error rate from about 10 5 to less than 10 12 .

show abstract

“…There are off course several other hybrid forms available providing other trade-offs. It has been noticed that the hybrid form FIR filters are suitable for low-power applications [2], [4].…”

Section: Introductionmentioning

confidence: 99%

Low-complexity hybrid form FIR filters using matrix multiple constant multiplication

Gustafsson

Coleman

Dempster

et al.

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004.

View full text Add to dashboard Cite

-Hybrid form FIR filters have been shown to provide a trade-off between the direct form and transposed direct form FIR filters resulting in a low power implementation. However, the use of multiple constant multiplication (MCM) techniques is less advantageous as it results in several MCM blocks. In this work a method of implementing low-complexity hybrid form FIR filters using matrix multiple constant multiplication blocks is proposed. The utilized filter structure can be seen as a polyphase decomposition with common delay lines for the subfilters.

show abstract

Low-power equalizer architectures for high speed modems

Cited by 37 publications

References 10 publications

FPGA-Implementation of Parallel and Sequential Architectures for Adaptive Noise Cancelation

FPGA-Implementation of Parallel and Sequential Architectures for Adaptive Noise Cancelation

Integrated transversal equalizers in high-speed fiber-optic systems

Low-complexity hybrid form FIR filters using matrix multiple constant multiplication

Contact Info

Product

Resources

About