Interference Mitigation Techniques for OFDMA-Based Digital Duplexing Systems

Chang-Hwan PARK  Han-Seong KIM  Yong-Soo CHO 

Publication
IEICE TRANSACTIONS on Communications  Vol.E95-B  No.7  pp.2477-2480
Publication Date: 2012/07/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
digital duplexing,  OFDMA,  TDoA,  interference mitigation, 

Full Text: PDF(161.3KB)

Summary: 
In OFDMA-based digital duplexing (DD) systems, the effective channel impulse response (CIR) is lengthened due to time difference of arrivals (TDoAs) from adjacent subscriber stations (SSs). In this letter, a time-domain shortening filter (TSF) is proposed to shorten the effective CIR by maximizing signal-to-interference ratio for pulse shortening (SIRPS). A time-domain window (TW) is also proposed to reduce the effect of inter-carrier interference (ICI) due to CFO in OFDMA-based DD systems, by maximizing the signal-to-interference and noise ratio for window (SINRW).