Open AccessOFDM-IDMA Uplink Multi-user System with Scalable Latency for Next Generation WLAN
Author(s) -
Leonardo Lanante,
Nguyen Tran Thi Thao,
Yuhei Nagao,
Hiroshi Ochi
Publication year - 2020
Publication title -
epi international journal of engineering
Language(s) - English
Resource type - Journals
eISSN - 2621-0541
pISSN - 2615-5109
DOI - 10.25042/epi-ije.022020.06
Subject(s) - telecommunications link , computer science , orthogonal frequency division multiplexing , multi user , latency (audio) , real time computing , scalability , computer network , spectral efficiency , low latency (capital markets) , channel (broadcasting) , electronic engineering , telecommunications , engineering , database
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