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.The basic elements of an algorithm for designing multiplier blocks for matrices are presented. The new algorithm often produces results superior to the best of the older algorithms applied only toâ€¦ (More)

- Amir Eghbali, HÃ¥kan Johansson, O. Gustafsson, Seb J. Savory
- Journal of Lightwave Technology
- 2014

This paper proposes optimal finite-length impulse response (FIR) digital filters, in the least-squares (LS) sense, for compensation of chromatic dispersion (CD) in digital coherent optical receivers.â€¦ (More)

- Karoline Johansson, O. Gustafsson, A.G. Dempster, L. Wanhammar
- Proceedings of the 12th IEEE Mediterraneanâ€¦
- 2004

In this paper an algorithm for realization of multiplier blocks using bitand digit-serial arithmetic is presented. Previously presented algorithms were designed for bit-parallel arithmetic and forâ€¦ (More)

Subexpression sharing is an important implementation issue when one data is multiplied with many constants or a sum of products is computed. By modelling the subexpression sharing problem usingâ€¦ (More)

- Karoline Johansson, O. Gustafsson, L. Wanhammar
- Proceedings of the 2005 European Conference onâ€¦
- 2005

Multiple constant multiplication (MCM) has been an active research area for the last decade. Most work so far have only considered the number of additions to realize a number of constantâ€¦ (More)

In this paper a new approach for the design of linear phase FIR filters with signed-powers-of-two (SPT) coefficients is proposed. A mixed integer linear programming (MILP) problem is formulated thatâ€¦ (More)

- O. Gustafsson, Henrik Ohlsson, L. Wanhammar
- Proceedings of the 6th Nordic Signal Processingâ€¦
- 2004

In this paper a novel approach for realizing constant coefficient matrix multiplication using few additions and subtractions is proposed. This method is applicable in, e.g., FIR filter banks,â€¦ (More)

- O. Gustafsson, H. Johansson, L. Wanhammar
- ISCAS
- 2000

ABSTRACT In this paper a novel structure for frequency masking based on a single filter is introduced. By using the proposed frequency masking approach the maximal sample frequency for narrow-bandâ€¦ (More)

- O. Gustafsson
- 2008 42nd Asilomar Conference on Signals, Systemsâ€¦
- 2008

In this work a novel approach to the multiple constant multiplication problem, i.e., finding a realization of a number of constant multiplications by using shift and addition with a minimum number ofâ€¦ (More)

- O. Gustafsson, L. S. DeBrunner, Victor DeBrunner, HÃ¥kan Johansson
- 2007 Conference Record of the Forty-Firstâ€¦
- 2007

In this work we consider the design of sparse FIR filters, i.e. filters with few non-zero multiplications. The considered filters have half-band like properties, but with slightly relaxedâ€¦ (More)