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Rotation Modulation Application to 802.11ac system

Rotation Modulation Application to 802.11ac system. Authors:. Date: 2010-11-8. Abstract. Rotation modulation technique for QPSK has already been adopted in 802.11ad system. Based on our recent research, this technique can also improve the overall performance of 802.11ac system.

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Rotation Modulation Application to 802.11ac system

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  1. Rotation Modulation Application to 802.11ac system Authors: Date: 2010-11-8

  2. Abstract • Rotation modulation technique for QPSK has already been adopted in 802.11ad system. Based on our recent research, this technique can also improve the overall performance of 802.11ac system.

  3. Our Proposed Scheme Encode Rotational Mod. OFDM • 1 Introduce rotational modulation matrices for 4/16/64/256 QAM • 2 Introduce space/time/frequency I/Q separate interleaver Space-Time-Freq Interleaver ( I/Q Separate) Precoding OFDM Encode Rotational Mod. CSI Estimation

  4. Our Proposed Rotation Matrix to 802.11ac system

  5. Simulation Parameters

  6. Rotation Modulation LOS (2*2),LDPC

  7. Gain of Rotation Modulation (LOS2*2),LDPC

  8. Rotation Modulation LOS (2*2),CC

  9. Gain of Rotation Modulation (LOS2*2),CC

  10. Rotation Modulation NLOS(4*4) ,CC

  11. Gain of Rotation Modulation (NLOS4*4),CC

  12. Rotation Modulation NLOS(8*8) ,CC

  13. Gain of Rotation Modulation (NLOS8*8),CC

  14. Effect of phase noise

  15. Conclusions • No matter LOS or NLOS channel, No matter LDPC Coding or Convolutional Coding, rotational modulation has obvious performance gain over conventional modulations, which is up to 7 dB. • For different antenna schemes,2*2 antenna scheme can achieve the largest relative gain; for 4 * 4 and 8 * 8, it also can obtain remarkable gain. • Rotational modulation is robust for phase noise. • In a word, based on our proposal, rotation modulation is also applicable to 802.11ac system.

  16. References • 1. IEEE P802.11 Wireless LANs PHY/MAC Complete Proposal Specification, 2010-05-18 • 2. J.Boutros, E.Viterbo, Signal Space Diversity: a power and bandwidth efficient diversity technique for the Rayleigh fading channel. IEEE Trans. Inform.Theory, vol.44. pp.1453-1467, July 1998 . • 3. Wu Zhanji, A novel Coding-Rotated-Modulation OFDM scheme, International Conference on Communication Technology and Application 2009, ICCTA 2009, October, 2009, pp:517-520 • 4. Erceg, V. et al. “TGn Channel Models.” Doc. IEEE802.11-03/940r4. • 5. Breit, G. et al., “TGac Channel Model Addendum,” Doc.IEEE 802.11-09/0308r12

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