convolutional coding for CSD
This patch adds the convolutional code definitions for CSD (circuit
switched data) on TCH/F channels with user bit rates of 2400, 4800, 9600
and 14400 bps.
Related: OS#4396, OS#1572
Change-Id: I412131d7ee2e676402bf8d88394af17c4447b664
diff --git a/utils/conv_codes_gsm.py b/utils/conv_codes_gsm.py
index 42f340b..a6e471e 100644
--- a/utils/conv_codes_gsm.py
+++ b/utils/conv_codes_gsm.py
@@ -42,6 +42,93 @@
]
),
+ # TCH/F2.4 definition
+ ConvolutionalCode(
+ 72,
+ [
+ (G1, 1),
+ (G2, 1),
+ (G3, 1),
+ (G1, 1),
+ (G2, 1),
+ (G3, 1),
+ ],
+ name = "tch_f24",
+ description = [
+ "TCH/F2.4 convolutional code:",
+ "72 bits blocks, rate 1/6, k = 5",
+ "G1 = 1 + D + D3 + D4",
+ "G2 = 1 + D2 + D4",
+ "G3 = 1 + D + D2 + D3 + D4",
+ "G1 = 1 + D + D3 + D4",
+ "G2 = 1 + D2 + D4",
+ "G3 = 1 + D + D2 + D3 + D4",
+ ]
+ ),
+
+ # TCH/F4.8 definition
+ ConvolutionalCode(
+ 152,
+ [
+ (G1, 1),
+ (G2, 1),
+ (G3, 1),
+ ],
+ name = "tch_f48",
+ description = [
+ "TCH/F4.8 convolutional code:",
+ "152 bits blocks, rate 1/3, k = 5",
+ "G1 = 1 + D + D3 + D4",
+ "G2 = 1 + D2 + D4",
+ "G3 = 1 + D + D2 + D3 + D4",
+ ]
+ ),
+
+ # TCH/F9.6 definition
+ ConvolutionalCode(
+ 240,
+ shared_polys["xcch"],
+ puncture = [
+ 11, 26, 41, 56, 71, 86, 101, 116, 131, 146, 161, 176,
+ 191, 206, 221, 236, 251, 266, 281, 296, 311, 326, 341, 356,
+ 371, 386, 401, 416, 431, 446, 461, 476, -1
+ ],
+ name = "tch_f96",
+ description = [
+ "TCH/F9.6 convolutional code:",
+ "240 bits blocks, rate 1/2, k = 5",
+ "G0 = 1 + D3 + D4",
+ "G1 = 1 + D + D3 + D4",
+ ]
+ ),
+
+ # TCH/F14.4 definition
+ ConvolutionalCode(
+ 290,
+ shared_polys["xcch"],
+ puncture = [
+ 1, 6, 11, 15, 19, 24, 29, 33, 37, 42, 47, 51,
+ 55, 60, 65, 69, 73, 78, 83, 87, 91, 96, 101, 105,
+ 109, 114, 119, 123, 127, 132, 137, 141, 145, 150, 155, 159,
+ 163, 168, 173, 177, 181, 186, 191, 195, 199, 204, 209, 213,
+ 217, 222, 227, 231, 235, 240, 245, 249, 253, 258, 263, 267,
+ 271, 276, 281, 285, 289, 294, 299, 303, 307, 312, 317, 321,
+ 325, 330, 335, 339, 343, 348, 353, 357, 361, 366, 371, 375,
+ 379, 384, 389, 393, 397, 402, 407, 411, 415, 420, 425, 429,
+ 433, 438, 443, 447, 451, 456, 461, 465, 469, 474, 479, 483,
+ 487, 492, 497, 501, 505, 510, 515, 519, 523, 528, 533, 537,
+ 541, 546, 551, 555, 559, 564, 569, 573, 577, 582, 584, 587,
+ -1
+ ],
+ name = "tch_f144",
+ description = [
+ "TCH/F14.4 convolutional code:",
+ "290 bits blocks, rate 1/2, k = 5",
+ "G0 = 1 + D3 + D4",
+ "G1 = 1 + D + D3 + D4",
+ ]
+ ),
+
# RACH definition
ConvolutionalCode(
14,