TY - JOUR AU - F. Uchôa-Filho, Bartolomeu AU - Demo Souza, Richard AU - Pimentel, Cecilio AU - P. Legg, Andrei AU - Jar, Marcel PY - 2015/06/18 Y2 - 2024/03/28 TI - Códigos Convolucionais Puncionados Refinados JF - Journal of Communication and Information Systems JA - Journal of Communication and Information Systems VL - 20 IS - 2 SE - Regular Papers DO - 10.14209/jcis.2005.14 UR - https://jcis.sbrt.org.br/jcis/article/view/319 SP - AB - <span>In this paper, a new class of punctured convolutional codes (PCCs) is presented, in which a PCC is obtained by punctUling a rate 1/2 periodically time-varying convolutional code (the "mother" code), where different phases within a petiod may have different memory sizes. In the new class, which encompasses all previous PCCs of rate greater than 1/2 ever published, the trellis complexity can be gradually increased resulting in a better distance spectrum at each new complexity increment, offering more flexibility on the choice of the complexity x petformance relationship.</span> ER -