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/* Linux PSK31 modem driver for soundcard -- Filter coefficients
*
* these FIR coefs are those used by G0TJZ in his TMC320C50 code
*
* Hansi Reiser, DL9RDZ, 20 April 1998
*/
/* 64-tap raised-cosine FIR*/
float fir1c[64]={
0.000000,
0.000038,
0.000150,
0.000336,
0.000595,
0.000922,
0.001317,
0.001773,
0.002288,
0.002856,
0.003472,
0.004130,
0.004823,
0.005545,
0.006288,
0.007047,
0.007812,
0.008578,
0.009337,
0.010080,
0.010802,
0.011495,
0.012153,
0.012769,
0.013337,
0.013852,
0.014308,
0.014703,
0.015030,
0.015289,
0.015475,
0.015587,
0.015625,
0.015587,
0.015475,
0.015289,
0.015030,
0.014703,
0.014308,
0.013852,
0.013337,
0.012769,
0.012153,
0.011495,
0.010802,
0.010080,
0.009337,
0.008578,
0.007813,
0.007047,
0.006288,
0.005545,
0.004823,
0.004130,
0.003472,
0.002856,
0.002288,
0.001773,
0.001317,
0.000922,
0.000595,
0.000336,
0.000150,
0.000038,
};
/* 4-bit receive filter for 31.25 baud BPSK
* Designed by G3PLX, version 2
*/
float fir2c[64]={
-0.00044789,
-0.00063167,
-0.00100256,
-0.00156531,
-0.00232266,
-0.00327063,
-0.00439342,
-0.00565850,
-0.00701253,
-0.00837907,
-0.00965823,
-0.01072878,
-0.01145278,
-0.01168246,
-0.01126911,
-0.01007335,
-0.00797606,
-0.00488924,
-0.00076591,
0.00439171,
0.01052660,
0.01752432,
0.02521404,
0.03337329,
0.04173643,
0.05000649,
0.05786981,
0.06501264,
0.07113857,
0.07598566,
0.07934199,
0.08105860,
0.08105860,
0.07934199,
0.07598566,
0.07113857,
0.06501264,
0.05786981,
0.05000649,
0.04173643,
0.03337329,
0.02521404,
0.01752432,
0.01052660,
0.00439171,
-0.00076591,
-0.00488924,
-0.00797606,
-0.01007335,
-0.01126911,
-0.01168246,
-0.01145278,
-0.01072878,
-0.00965823,
-0.00837907,
-0.00701253,
-0.00565850,
-0.00439342,
-0.00327063,
-0.00232266,
-0.00156531,
-0.00100256,
-0.00063167,
-0.00044789,
};
float fir2cnew[64]={
0.000625000,
0.000820912,
0.001374651,
0.002188141,
0.003110600,
0.003956273,
0.004526787,
0.004635947,
0.004134515,
0.002932456,
0.001016352,
-0.001539947,
-0.004572751,
-0.007834665,
-0.011009254,
-0.013733305,
-0.015625000,
-0.016315775,
-0.015483216,
-0.012882186,
-0.008371423,
-0.001933193,
0.006315933,
0.016124399,
0.027115485,
0.038807198,
0.050640928,
0.062016866,
0.072333574,
0.081028710,
0.087617820,
0.091728168,
0.093125000,
0.091728168,
0.087617820,
0.081028710,
0.072333574,
0.062016866,
0.050640928,
0.038807198,
0.027115485,
0.016124399,
0.006315933,
-0.001933193,
-0.008371423,
-0.012882186,
-0.015483216,
-0.016315775,
-0.015625000,
-0.013733305,
-0.011009254,
-0.007834665,
-0.004572751,
-0.001539947,
0.001016352,
0.002932456,
0.004134515,
0.004635947,
0.004526787,
0.003956273,
0.003110600,
0.002188141,
0.001374651,
0.000820912
};
float ampcof[16] = {
-0.097545161,
-0.093796555,
-0.086443400,
-0.075768274,
-0.062181416,
-0.046204960,
-0.028452874,
-0.009607360,
0.009607360,
0.028452874,
0.046204960,
0.062181416,
0.075768274,
0.086443400,
0.093796555,
0.097545161
};
|
