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IEEE Transactions on Information Theory. 01/2012; 58:878-887.
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IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2011, 4-6 July 2011, Chennai, India; 01/2011
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IEEE Transactions on Communications. 01/2009; 57:1329-1340.
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IEEE Transactions on Information Theory. 01/2009; 55:764-775.
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International Symposium on Circuits and Systems (ISCAS 2009), 24-17 May 2009, Taipei, Taiwan; 01/2009
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IEEE Transactions on Communications. 01/2008; 56:808-817.
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ABSTRACT: We minimize the frequency and time occupancy of multicarrier binary linear modulation based on two-dimensional faster than Nyquist (FTN) signaling. FTN analysis provides the asymptotic time-frequency consumption per bit and prolate spheroidal wave analysis minimizes the side lobe occupancy. For both problems, an excellent choice is a Gaussian pulse, with some adjustment of the side lobes.
Information Theory, 2007. ISIT 2007. IEEE International Symposium on; 07/2007
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Proceedings of IEEE International Conference on Communications, ICC 2007, Glasgow, Scotland, 24-28 June 2007; 01/2007
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ABSTRACT: Mazo¿s concept of Faster Than Nyquist signaling is extended to pulse trains that modulate adjacent subcarriers, in a manner similar to orthogonal frequency division multiplex (OFDM) transmission. Despite pulses that are faster than the Nyquist limit and subcarriers that significantly overlap, the transmission system achieves the isolated pulse error performance. Systems with at least twice the spectral efficiency of OFDM can be achieved at the same error probability. Receiver design is challenging, and we report tests of several options.
Turbo Codes&Related Topics; 6th International ITG-Conference on Source and Channel Coding (TURBOCODING), 2006 4th International Symposium on; 05/2006
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Proceedings of the International Conference on Wireless Communications and Mobile Computing, IWCMC 2006, Vancouver, British Columbia, Canada, July 3-6, 2006; 01/2006
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Proceedings of the Global Telecommunications Conference, 2006. GLOBECOM '06, San Francisco, CA, USA, 27 November - 1 December 2006; 01/2006
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ABSTRACT: This paper analyses the tailbiting BCJR decoder's performance and behavior when the precision in the decoder is changed. Working variables in the BCJR decoder can decrease rapidly when a noise burst occurs, especially in good channels where the signal to noise ratio is high. To reduce these effects it is suggested to use hardware efficient bit-shift operations instead of a high precision in the decoder. Furthermore, it is shown that the decoder is rather robust to incorrect knowledge of the channel's true signal to noise ratio. We find that misleading the decoder to believe the channel is worse than it actually is has major hardware advantages with little performance loss.
