Title :
Improved super-orthogonal codes through generalized rotations
Author :
Janani, Mohammad ; Hedayat, Ahmadreza ; Nosratinia, Aria
Author_Institution :
Multimedia Commun. Lab., Texas Univ., Richardson, TX, USA
fDate :
29 Nov.-3 Dec. 2004
Abstract :
Orthogonal space-time block codes (OSTBC) enjoy simple decoding, but have limited coding gain, if any. By concatenating OSTBC with an outer trellis, simple and powerful codes have been constructed, known as super-orthogonal codes or STB-TCM. In this work, we generalize these codes by exploring new code supersets, through mappings that do not induce any instantaneous modulation constellation expansion. By finding new mappings and establishing the properties of the resulting set partitions, we provide design guidelines for the labeling of the generalized code trellises. Simulations demonstrate significant coding gains resulting from our codes.
Keywords :
block codes; set theory; space-time codes; trellis coded modulation; OSTBC; STB-TCM; code mappings; code supersets; coding gain; design guidelines; generalized code trellis labeling; generalized rotations; modulation constellation expansion; orthogonal space-time block codes; outer trellis concatenated OSTBC; set partitions; simulations; super-orthogonal codes; Block codes; Convolutional codes; Decoding; Electronic mail; Guidelines; Laboratories; Modulation coding; Multimedia communication; Signal mapping; Space time codes;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1379074
