OFDM-IDMA Uplink Multi-user System with Scalable Latency for Next Generation WLAN

  • Leonardo Alisasis Lanante Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology
  • Nguyen Tran Thi Thao Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology
  • Yuhei Nagao Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology
  • Hiroshi Ochi Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology
Keywords: 802.11ax, IDMA, Uplink Multi-User Access

Abstract

In this paper, we propose an Interleave-Division Multiple Access (IDMA) based uplink multi-user system fornext generation WLAN. By minimizing the latency throughaccurate detection per iteration, we were able to design a receiver architecture that meets the latency demands of current IEEE802.11 WLAN. To do this, the proposed system utilizes a novel algorithm for simplified LLR calculation of the soft input soft output demapper needed in the IDMA first stage detection.The proposed system has a maximum of 34.8 bits/s/Hz spectral efficiency for a single spatial stream and can support up to 8 users in a single 20MHz channel. We compare the proposed system to a reference OFDMA system and show its advantages in terms of diversity, flexibility and BER performance.

Keywords: 802.11ax; IDMA; uplink multi-user access

Published
2020-09-01
How to Cite
Lanante, L., Tran Thi Thao, N., Nagao, Y., & Ochi, H. (2020, September 1). OFDM-IDMA Uplink Multi-user System with Scalable Latency for Next Generation WLAN. EPI International Journal of Engineering, 3(1), 39-45. https://doi.org/https://doi.org/10.25042/epi-ije.022020.06