3rd International ICSTConference on Wireless Internet

Research Article

Analysis on Random Access Process of Single Carrier FDMA System

Download630 downloads
  • @INPROCEEDINGS{10.4108/wicon.2007.2092,
        author={Doo Hwan Lee and Hiroyuki Morikawa},
        title={Analysis on Random Access Process of Single Carrier FDMA System},
        proceedings={3rd International ICSTConference on Wireless Internet},
        keywords={SC-FDMA LTE Random access},
  • Doo Hwan Lee
    Hiroyuki Morikawa
    Year: 2010
    Analysis on Random Access Process of Single Carrier FDMA System
    DOI: 10.4108/wicon.2007.2092
Doo Hwan Lee1,*, Hiroyuki Morikawa1,*
  • 1: Graduate School of the Frontier Informatics, The University of Tokyo
*Contact email: leedh@mlab.t.u-tokyo.ac.jp, mori@mlab.t.u-tokyo.ac.jp


In this paper we analyzed random access process of single carrier FDMA (SC-FDMA) system, which is one of uplink candidates in 3GPP long term evolution. In random access process each user equipments (UE) transmits randomly selected random access code and the Node B detects each UE's random access try by code identification. It is conducted by exploiting the cross-correlation property of random access code. Moreover, round trip time (RTT) is also estimated during random access detection process for uplink time synchronization utilizing the auto-correlation of random access code. This paper proposed random access detection scheme which adopts the frequency domain RTT estimation and the time domain code identification. The performance of random access of SC-FDMA system highly depends on correlation properties. However, they are susceptible to channel characteristics in the multipath fading channel environments. Thus, this paper analyzed the performance of random access in the multipath fading channel. Results of our analysis will be beneficial as the guideline in designing SC-FDMA based random access system.