A Synchronous Digital Duplexing Technique for OFDMA-Based Indoor Communications

Chang-Hwan PARK
Yo-Han KO
Yeong-Jun KIM
Kyung-Won PARK
Jong-Ho PAIK
Seok-Pil LEE
Yong-Soo CHO

IEICE TRANSACTIONS on Communications   Vol.E92-B    No.7    pp.2492-2495
Publication Date: 2009/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2492
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
SDD,  OFDM,  TDD,  FDD,  Zipper,  mutual ranging,  

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In this paper, we propose a new digital duplexing scheme, called synchronous digital duplexing (SDD), which can increase data efficiency and flexibility of resource by transmitting uplink signal and downlink signal simultaneously in wireless communication. In order to transmit uplink and downlink signals simultaneously, the proposed SDD obtains mutual information among subscriber stations (SSs) with a mutual ranging symbol. This information is used for selection of transmission time, decision on cyclic suffix (CS) insertion, determination of CS length, and re-establishment of FFT starting point.