Let an [n, k, d]
q
code be a linear code of length n, dimension k, and with minimum Hamming distance d over GF(q). The ratio R = k/n is called the rate of a code. In this paper, [62, 53, 6]5, [62, 48, 8]5, [71, 56, 8]5, [124, 113, 6]5, [43, 36, 6]7, [33, 23, 7]7, and [27, 18, 7]7 high-rate codes and new codes with parameters [42, 14, 19]5, [42, 15, 18]5, [48, 13,...... hiện toàn bộ