doc.: IEEE wng-r0 Contribution Labeling diversity Date: November 2013 Maciej Krasicki (Poznan University of Technology)Slide 1 Authors:

doc.: IEEE wng-r0 Contribution Outline Diversity BI-STCM-ID Labelling diversity Analytical & simulation results Discussion November 2013 Maciej Krasicki (Poznan University of Technology)Slide 2

doc.: IEEE wng-r0 Contribution Diversity To protect signal against fading effects Information transmitted through a number of diversity branches to get independent replicas Diversity branches: –time –frequency –polarization –space  multi-antenna transmission and/or reception (SC, EGC, MRC, etc.), multi-path transmission November 2013 Maciej Krasicki (Poznan University of Technology)Slide 3 –space-time

doc.: IEEE wng-r0 Contribution Bit-Interleaved Space-Time Coded Modulation November 2013 Maciej Krasicki (Poznan University of Technology)Slide 4 Transmitter

doc.: IEEE wng-r0 Contribution Bit-Interleaved Space-Time Coded Modulation (+ iterative decoding) November 2013 Maciej Krasicki (Poznan University of Technology)Slide 5 Receiver Information from channel Information from channel Extrinsic inf. of demapper Extrinsic inf. of demapper Extrinsic inf. of decoder Extrinsic inf. of decoder Decisions

doc.: IEEE wng-r0 Contribution Iteratively-decoded systems  error bounds Error-free-feedback (EF) bound Asymptotic BER performance and coding gain November 2013 Maciej Krasicki (Poznan University of Technology)Slide 6 E b /N 0 (dB) BER R  data rate a  d f c = const.

doc.: IEEE wng-r0 Contribution Asymptotic coding gain, distance between space-time codewords in BI-STCM-ID Asymptotic coding gain November 2013 Maciej Krasicki (Poznan University of Technology)Slide 7 |  (0000)-  (0000)| 2

doc.: IEEE wng-r0 Contribution Labeling diversity November 2013 Maciej Krasicki (Poznan University of Technology)Slide 8  1 (0000)  1 (0010)  1 (0000)  1 (0010)  2 (0000)  2 (0010) Antenna #1 Antenna #2

doc.: IEEE wng-r0 Contribution Conv. Encoder  mapper (  1 ) (  2 )  x x (1) 2t 2t+1 x x (2) 2t 2t+1 x x (2) 2t+1 (2) 2t d u X t v v 2 t 2t+1 Transmitter exploiting labelling diversity November 2013 Maciej Krasicki (Poznan University of Technology)Slide 9 Mapper (  1 ) Mapper (  1 ) Mapper (  2 ) Mapper (  2 )  (1)  (2) ?

doc.: IEEE wng-r0 Contribution Transmitter exploiting labeling diversity November 2013 Maciej Krasicki (Poznan University of Technology)Slide 10  (1)  (2) ? Intuitive labeling diversity*  (1) – optimal BI-STCM-ID labeling  (2) – improved BI-STCM-ID labeling * M. Krasicki, „Labelling diversity for MIMO systems”, Proc. European Wireless 2011, Wien, April 27-29, 2011 Improved labeling diversity**  (1) – optimal BI-STCM-ID labeling  (2) – found by Binary Switching Algorithm ** M. Krasicki, „Improved labelling diversity”, Proc. Int. Wireless Comm. and Mobile Computing 2011 Conf., Istanbul, April 27-29, 2011

doc.: IEEE wng-r0 Contribution Improved 16-QAM labeling pair November 2013 Maciej Krasicki (Poznan University of Technology)Slide 11

doc.: IEEE wng-r0 Contribution Asymptotic coding gain 12

doc.: IEEE wng-r0 Contribution Joint optimization of labeling map pairs* November 2013 Maciej Krasicki (Poznan University of Technology)Slide 13 * M. Krasicki, „Essence of labelling diversity”, Electronics Letters, vol. 49, Issue: 8, April 2013, pp ,

doc.: IEEE wng-r0 Contribution November 2013 Maciej Krasicki (Poznan University of Technology)Slide 14

doc.: IEEE wng-r0 Contribution Point-wise distance spectrum - categorization of const. points November 2013 Maciej Krasicki (Poznan University of Technology)Slide 15

doc.: IEEE wng-r0 Contribution November 2013 Maciej Krasicki (Poznan University of Technology)Slide 16

doc.: IEEE wng-r0 Contribution November 2013 Maciej Krasicki (Poznan University of Technology)Slide 17

doc.: IEEE wng-r0 Contribution EXIT chart analysis 18Maciej Krasicki (Poznan University of Technology)

doc.: IEEE wng-r0 Contribution EXIT chart analysis 19 E b /N 0 = 1dB Maciej Krasicki (Poznan University of Technology)

doc.: IEEE wng-r0 Contribution BER simulation results 2000 data bits per frame Transmission through uncorrelated Rayleigh fading channel 20Maciej Krasicki (Poznan University of Technology)

doc.: IEEE wng-r0 Contribution Towards higher spectral efficiency 21Maciej Krasicki (Poznan University of Technology) LD

doc.: IEEE wng-r0 Contribution Discussion Could WLANs benefit from LD? Modification of labeling maps required Need for efficient real-time receivers Should be considered for different modulation orders Desired for any iteratively-decoded BI-STCM: Random bit interleaver with high interleaving depth Short-constrained-length codes for early convergence Maciej Krasicki (Poznan University of Technology)22