180 Rotationally Invariant Repeat-Accumulate Codes

Wangrok OH, Kyungwhoon CHEUN

Summary :

In digital communication systems employing binary phase-shift keying and non-data-aided carrier phase recovery, a 180 carrier phase ambiguity is inevitable. Here, we propose a simple modification to the standard regular repeat-accumulate (RA) code structure by exploiting the differential encoding inherent to the inner encoder of RA codes resulting in codes that are 180 rotationally invariant. The proposed code structure exhibit performance virtually identical to that of standard regular RA codes with zero carrier phase offset under both zero and 180 carrier phase offsets with negligible additional hardware complexity.

• Publication: IEICE TRANSACTIONS on Communications Vol.E92-B No.5 pp.1884-1887
• Publication Date: 2009/05/01
• Online ISSN: 1745-1345
• DOI: 10.1587/transcom.E92.B.1884
• Type of Manuscript: LETTER
• Category: Fundamental Theories for Communications

Authors

Wangrok OH
Kyungwhoon CHEUN

Keyword

repeat-accumulate codes,  phase synchronization,  phase ambiguity