Loopback Signal Cancellation Scheme in the Equalization Digital On-Channel Repeater

Kim, Suk Chan; Park, Dong Chan; Park, Sung Ik; Lee, Yong Tae

doi:10.1109/icce.2007.341424

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Most of them utilize the so-called LMS (Least Mean Square, see [4]) adaptive filter to perform the feedback signal suppression by iteratively adjusting the taps of a linear filter under a Mean Squared Error (MSE) minimization criteria [5], [6]. This algorithm requires a desired signal or reference input, which is usually set to the output of the post-amplifier signal (e.g.…”

Section: Introductionmentioning

confidence: 99%

Design, simulation and hardware validation of a low-cost CLMS echo canceling system

Prieto¹,

Sanchez²,

Ser³

et al. 2009

2009 Joint IEEE North-East Workshop on Circuits and Systems and TAISA Conference

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This paper presents the design, simulation and performance of a low-cost echo canceler for its application to on-channel repeaters in single frequency DVB-T networks. In these devices an echo canceler is required in order to avoid the coupling echoes produced between transmission and reception antennas. The designed echo canceler is based on an adaptive FIR filter where a correlation-based LMS algorithm (namely, CLMS) is used for updating the set of complex coefficients under a Minimum Squared Error (MSE) criteria. The implemented prototype includes an Analog Devices floating-point DSP and a Virtex II Pro FPGA core. Computer simulation results and the registered in-lab measurements of the prototype verify that our approach shows surprisingly satisfactory echo attenuation capabilities at a minimal computational cost.

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Section: Introductionmentioning

confidence: 99%