FreeCalypso > hg > fc-magnetite
annotate src/cs/layer1/gtt_include/ctm/tonedemod.h @ 5:53c4389afc06
cfg-headers/2091: pdt_2091 config headers
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 26 Sep 2016 01:16:12 +0000 |
parents | 945cf7f506b2 |
children |
rev | line source |
---|---|
0
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1 /* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
2 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
3 * |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
5 * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
6 * |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
7 * The program(s) may be used and/or copied only with the |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
8 * written permission from Ericsson or in accordance |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
9 * with the terms and conditions stipulated in the agreement or |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
10 * contract under which the program(s) have been supplied. |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
11 * |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
12 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
13 * |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
14 * File : tonedemod.h |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
15 * Purpose : Demodulator for the Cellular Text Telephone Modem |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
16 * 1-out-of-4 tones (400, 600, 800, 1000 Hz) |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
17 * for the coding of each pair of two adjacent bits |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
18 * |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
19 * Definition of the type demod_state_t and of the |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
20 * functions init_tonedemod() and tonedemod() |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
21 * |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
22 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
23 */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
24 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
25 #ifndef tonedemod_h |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
26 #define tonedemod_h "$Id: $" |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
27 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
28 /* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
29 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
30 * INCLUDE FILES |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
31 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
32 */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
33 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
34 #include "ctm_defines.h" |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
35 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
36 /* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
37 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
38 * DECLARATION OF PROTOTYPES |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
39 ******************************************************************************* |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
40 */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
41 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
42 typedef struct { |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
43 WORD16 buffer_tone_rx[3*SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
44 WORD16 xcorr_t0[2*SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
45 WORD16 xcorr_t1[2*SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
46 WORD16 xcorr_t2[2*SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
47 WORD16 xcorr_t3[2*SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
48 WORD16 xcorr_wb[2*SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
49 WORD16 lowpass[SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
50 WORD16 waveform_t0[SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
51 WORD16 waveform_t1[SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
52 WORD16 waveform_t2[SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
53 WORD16 waveform_t3[SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
54 WORD16 diff_smooth[SYMB_LEN]; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
55 } demod_state_t; |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
56 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
57 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
58 /* ----------------------------------------------------------------------- */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
59 /* FUNCTION tonedemod() */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
60 /* ******************** */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
61 /* Tone Demodulator for the Cellular Text Telephone Modem */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
62 /* using one out of four tones for coding two bits in parallel within a */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
63 /* frame of 40 samples (5 ms). */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
64 /* */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
65 /* The function has to be called for every frame of 40 samples of the */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
66 /* received tone sequence. However, in order to track a non-ideal */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
67 /* of the transmitter's and the receiver's clock frequencies, one frame */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
68 /* might be shorter (only 39 samples) or longer (41 samples). The */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
69 /* of the following frame is indicated by the variable */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
70 /* *sampling_correction, which is calculated and returned by this function.*/ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
71 /* */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
72 /* input variables: */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
73 /* bits_out contains the 39, 40 or 41 actual samples of the */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
74 /* received tones; the bits are soft bits, i.e. they */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
75 /* are in the range between -1.0 and 1.0, where the */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
76 /* magnitude serves as reliability information */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
77 /* num_in_samples number of valid samples in bits_out */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
78 /* */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
79 /* output variables: */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
80 /* bits_out contains the two actual decoded soft bits */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
81 /* sampling_correction is either -1, 0, or 1 and indicates whether the */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
82 /* next frame shall contain 39, 40, or 41 samples */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
83 /* demod_state contains all the memory of tonedemod. Must be */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
84 /* initialized using the function init_tonedemod() */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
85 /* ----------------------------------------------------------------------- */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
86 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
87 void tonedemod(WORD16 *bits_out, |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
88 WORD16 *rx_tone_vec, |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
89 WORD16 num_in_samples, |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
90 WORD16 *ptr_sampling_correction, |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
91 demod_state_t *demod_state); |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
92 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
93 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
94 /* ----------------------------------------------------------------------- */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
95 /* FUNCTION init_tonedemod() */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
96 /* ************************* */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
97 /* Initialization of one instance of the Tone Demodulator. The argument */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
98 /* must contain a pointer to a variable of type demod_state_t, which */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
99 /* contains all the memory of the tone demodulator. Each instance of */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
100 /* tonedemod must have its own variable. */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
101 /* ----------------------------------------------------------------------- */ |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
102 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
103 void init_tonedemod(demod_state_t *demod_state); |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
104 |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
105 #endif |
945cf7f506b2
src/cs: chipsetsw import from tcs211-fcmodem
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
106 |