0000000000485007

AUTHOR

Vicenc Almenar

showing 2 related works from this author

Design of an efficient digital down-converter for a SDR-based DVB-S receiver

2007

This paper presents the design of an area-power efficient digital down-converter suitable for broadband communication systems. The DVB-S standard has been used as a design example. It has been shown that by selecting a bandpass sampling to generate only one spectral image, the case in which the relationship between the digital carrier frequency and the sampling frequency is 1/4, not only gives the smallest area but the lowest power consumption.

Carrier signalDigital down converterUndersamplingComputer sciencePower consumptionDigital Video BroadcastingElectronic engineeringDigital broadcastingDigital radioDVB-S2007 18th European Conference on Circuit Theory and Design
researchProduct

Combined K-Best sphere decoder based on the channel matrix condition number

2008

It is known that sphere decoding (SD) methods can provide maximum-likelihood (ML) detection over Gaussian MIMO channels with lower complexity than the exhaustive search. Channel matrix condition number represents an important influence on the performance of usual detectors. Throughout this paper, two particular cases of a SD method called K-Best carry out a combined detection in order to reduce the computational complexity with predictable performance degradation. Algorithm selection is based on channel matrix condition number thresholding. K-Best is a suboptimal SD algorithm for finding the ML solution of a detection problem. It is based on a fixed complexity tree search, set by a paramete…

Mathematical optimizationComputational complexity theoryGaussianBrute-force searchThresholdingsymbols.namesakeMatrix (mathematics)symbolsCondition numberAlgorithmDecoding methodsComputer Science::Information TheoryMathematicsCommunication channel2008 3rd International Symposium on Communications, Control and Signal Processing
researchProduct