| 1. |
- Alexander, Paul D., et al.
(författare)
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A linear receiver for coded multiuser CDMA
- 1997
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Ingår i: IEEE Transactions on Communications. - : Institute of Electrical and Electronics Engineers (IEEE). - 0090-6778 .- 1558-0857. ; 45:5, s. 605-610
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Tidskriftsartikel (refereegranskat)
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| 2. |
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| 3. |
- Berge, Andreas, et al.
(författare)
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Identification of an insertion sequence located in a region encoding virulence factors of Streptococcus pyogenes
- 1998
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Ingår i: Infection and Immunity. - 1098-5522. ; 66:7, s. 3449-3453
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Tidskriftsartikel (refereegranskat)abstract
- An insertion sequence, IS1562, was identified in a Streptococcus pyogenes strain of the clinically important M1 serotype. IS1562 is located in the mga regulon between the genes coding for the M protein and the C5a peptidase, both important virulence factors. The same or similar insertion sequences were found in most S. pyogenes strains, but the chromosomal location differed among isolates.
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| 4. |
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| 5. |
- Johansson, Ann-Louise, 1968, et al.
(författare)
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Linear group-wise successive interference cancellation in CDMA
- 1998
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Ingår i: Proceedings IEEE International Symposium on Spread Spectrum Techniques and Applications, Sun City, South Africa, 2-4 Sep 1998. ; 1, s. 121-126
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Konferensbidrag (refereegranskat)abstract
- In this paper, we consider a matrix-algebraic approach to linear group-wise successive interference cancellation. As for both successive and parallel cancellation, it is shown that the general linear group-wise scheme corresponds to a one-shot linear matrix filtering. Furthermore, it is shown that if the general structure converges, it converges to the decorrelator. Four structures are considered for the group detector, namely the matched filter, the parallel canceller, the decorrelator and the MMSE detector, and the equivalent one-shot filters are derived. Conditions for convergence related to the grouping are studied and it is shown that group detection with a decorrelator, which has conventional successive interference cancellation as a special case, always converges. Through numerical examples, it is illustrated that the performance for all the structures behaves like the performance for the linear successive canceller where a minimum BER is reached before convergence to the performance of the decorrelator occurs. The matched filter group canceller achieves the lowest minimum BER but also has the slowest convergence.
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| 6. |
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| 7. |
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| 8. |
- Lim, Teng Joon, et al.
(författare)
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Multi-user code division multiple access receiver
- 1997
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Patent (populärvet., debatt m.m.)abstract
- A receiver and method for receiving a code-division multiple-access (CDMA) signal combining symbol values spread by a plurality of spreading codes, which method comprises the steps of:(a) converting the CDMA signal to a baseband signal; (b) recognizing symbol boundaries in every multipath for every user in the baseband signal to produce a delay estimate; (c) estimating an attenuation and phase rotation impressed on the signal by each multipath to produce channel estimates; (d) generating new symbol estimates for every user at a sampling rate that is greater than a symbol rate of the signal; (e) generating an estimate of the received signal using said symbol estimates and channel estimates; (f) comparing the received signal with its estimate and feeding estimation error back to a means for estimating the transmitted symbols; (g) sampling the symbol estimates at the estimated symbol boundaries of each user to obtain final symbol estimates; and(h) repeating steps (b) through (g) with every new sample.
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| 9. |
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| 10. |
- Rasmussen, Lars Kildehöj, et al.
(författare)
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Breadth-first maximum likelihood detection in multiuser CDMA
- 1997
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Ingår i: IEEE Transactions on Communications. - : Institute of Electrical and Electronics Engineers (IEEE). - 0090-6778 .- 1558-0857. ; 45:10, s. 1176-1178
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Tidskriftsartikel (refereegranskat)
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