A method of operation of a transmit node in a wireless communication system, the method comprising: performing polar encoding of a set of K information bits to thereby generate a set of polar-encoded information bits wherein: the K information bits are mapped to a subsequence of K bit locations in an information sequence S N, the information sequence S N being a ranked sequence of N information bit locations among a plurality of input bits for the polar encoding where N is equivalent to a code length; a size of the information sequence S N is greater than K; wherein N = 128, and the information sequence S N is: S 128 1 = [127 126 125 123 119 111 95 124 63 122 121 118 117 110 115 109 94 107 93 62 103 61 120 91 87 116 114 79 59 108 113 55 106 92 47 102 105 90 31 101 89 86 60 99 85 58 78 57 83 112 54 77 46 53 104 75 51 100 71 45 30 88 43 98 29 84 39 97 27 82 56 76 23 52 15 81 74 50 44 73 70 42 49 69 28 41 67 26 38 96 37 25 22 35 80 21 14 72 19 13 48 68 11 40 7 66 36 24 65 34 20 33 18 12 17 10 6 9 5 64 3 32 16 8 4 2 1 0]; or S 128 1 = [0 1 2 4 8 16 32 3 64 5 6 9 10 17 12 18 33 20 34 65 24 36 66 7 11 40 68 13 19 48 72 14 21 80 35 22 25 37 96 38 26 67 41 28 69 42 49 70 73 44 50 74 81 15 52 23 76 56 82 27 97 39 84 29 98 43 88 30 45 71 100 51 75 104 46 53 77 54 83 57 112 78 58 85 99 60 86 89 101 31 90 105 102 47 92 106 55 113 79 108 59 114 116 87 91 120 61 103 62 93 107 94 109 115 110 117 118 121 122 63 124 95 111 119 123 125 126 127]. the K information bits are mapped to a subsequence of K bit locations in an information sequence S N, the information sequence S N being a ranked sequence of N information bit locations among a plurality of input bits for the polar encoding where N is equivalent to a code length; a size of the information sequence S N is greater than K; wherein N = 128, and the information sequence S N is: S 128 1 = [127 126 125 123 119 111 95 124 63 122 121 118 117 110 115 109 94 107 93 62 103 61 120 91 87 116 114 79 59 108 113 55 106 92 47 102 105 90 31 101 89 86 60 99 85 58 78 57 83 112 54 77 46 53 104 75 51 100 71 45 30 88 43 98 29 84 39 97 27 82 56 76 23 52 15 81 74 50 44 73 70 42 49 69 28 41 67 26 38 96 37 25 22 35 80 21 14 72 19 13 48 68 11 40 7 66 36 24 65 34 20 33 18 12 17 10 6 9 5 64 3 32 16 8 4 2 1 0]; or S 128 1 = [0 1 2 4 8 16 32 3 64 5 6 9 10 17 12 18 33 20 34 65 24 36 66 7 11 40 68 13 19 48 72 14 21 80 35 22 25 37 96 38 26 67 41 28 69 42 49 70 73 44 50 74 81 15 52 23 76 56 82 27 97 39 84 29 98 43 88 30 45 71 100 51 75 104 46 53 77 54 83 57 112 78 58 85 99 60 86 89 101 31 90 105 102 47 92 106 55 113 79 108 59 114 116 87 91 120 61 103 62 93 107 94 109 115 110 117 118 121 122 63 124 95 111 119 123 125 126 127]. S 128 1 = [127 126 125 123 119 111 95 124 63 122 121 118 117 110 115 109 94 107 93 62 103 61 120 91 87 116 114 79 59 108 113 55 106 92 47 102 105 90 31 101 89 86 60 99 85 58 78 57 83 112 54 77 46 53 104 75 51 100 71 45 30 88 43 98 29 84 39 97 27 82 56 76 23 52 15 81 74 50 44 73 70 42 49 69 28 41 67 26 38 96 37 25 22 35 80 21 14 72 19 13 48 68 11 40 7 66 36 24 65 34 20 33 18 12 17 10 6 9 5 64 3 32 16 8 4 2 1 0]; or S 128 1 = [0 1 2 4 8 16 32 3 64 5 6 9 10 17 12 18 33 20 34 65 24 36 66 7 11 40 68 13 19 48 72 14 21 80 35 22 25 37 96 38 26 67 41 28 69 42 49 70 73 44 50 74 81 15 52 23 76 56 82 27 97 39 84 29 98 43 88 30 45 71 100 51 75 104 46 53 77 54 83 57 112 78 58 85 99 60 86 89 101 31 90 105 102 47 92 106 55 113 79 108 59 114 116 87 91 120 61 103 62 93 107 94 109 115 110 117 118 121 122 63 124 95 111 119 123 125 126 127].