//--------------------------------------------------------------------
// M17 C library - math/rrc.c
//
// Wojciech Kaczmarski, SP5WWP
// M17 Project, 29 December 2023
//--------------------------------------------------------------------
#include <m17/m17.h>

//sample RRC filter for 48kHz sample rate
//alpha=0.5, span=8, sps=10, gain=sqrt(sps)
const float rrc_taps_10[8*10+1]=
{
	-0.003195702904062073f, -0.002930279157647190f, -0.001940667871554463f,
	-0.000356087678023658f,  0.001547011339077758f,  0.003389554791179751f,
	 0.004761898604225673f,  0.005310860846138910f,  0.004824746306020221f,
	 0.003297923526848786f,  0.000958710871218619f, -0.001749908029791816f,
	-0.004238694106631223f, -0.005881783042101693f, -0.006150256456781309f,
	-0.004745376707651645f, -0.001704189656473565f,  0.002547854551539951f,
	 0.007215575568844704f,  0.011231038205363532f,  0.013421952197060707f,
	 0.012730475385624438f,  0.008449554307303753f,  0.000436744366018287f,
	-0.010735380379191660f, -0.023726883538258272f, -0.036498030780605324f,
	-0.046500883189991064f, -0.050979050575999614f, -0.047340680079891187f,
	-0.033554880492651755f, -0.008513823955725943f,  0.027696543159614194f,
	 0.073664520037517042f,  0.126689053778116234f,  0.182990955139333916f,
	 0.238080025892859704f,  0.287235637987091563f,  0.326040247765297220f,
	 0.350895727088112619f,  0.359452932027607974f,  0.350895727088112619f,
	 0.326040247765297220f,  0.287235637987091563f,  0.238080025892859704f,
	 0.182990955139333916f,  0.126689053778116234f,  0.073664520037517042f,
	 0.027696543159614194f, -0.008513823955725943f, -0.033554880492651755f,
	-0.047340680079891187f, -0.050979050575999614f, -0.046500883189991064f,
	-0.036498030780605324f, -0.023726883538258272f, -0.010735380379191660f,
	 0.000436744366018287f,  0.008449554307303753f,  0.012730475385624438f,
	 0.013421952197060707f,  0.011231038205363532f,  0.007215575568844704f,
	 0.002547854551539951f, -0.001704189656473565f, -0.004745376707651645f,
	-0.006150256456781309f, -0.005881783042101693f, -0.004238694106631223f,
	-0.001749908029791816f,  0.000958710871218619f,  0.003297923526848786f,
	 0.004824746306020221f,  0.005310860846138910f,  0.004761898604225673f,
	 0.003389554791179751f,  0.001547011339077758f, -0.000356087678023658f,
	-0.001940667871554463f, -0.002930279157647190f, -0.003195702904062073f
};

//sample RRC filter for 24kHz sample rate
//alpha=0.5, span=8, sps=5, gain=sqrt(sps)
const float rrc_taps_5[8*5+1]=
{
	-0.004519384154389f, -0.002744505321971f,
	 0.002187793653660f,  0.006734308458208f,
	 0.006823188093192f,  0.001355815246317f,
	-0.005994389201970f, -0.008697733303330f,
	-0.002410076268276f,  0.010204314627992f,
	 0.018981413448435f,  0.011949415510291f,
	-0.015182045838927f, -0.051615756197679f,
	-0.072094910038768f, -0.047453533621088f,
	 0.039168634270669f,  0.179164496628150f,
	 0.336694345124862f,  0.461088271869920f,
	 0.508340710642860f,  0.461088271869920f,
	 0.336694345124862f,  0.179164496628150f,
	 0.039168634270669f, -0.047453533621088f,
	-0.072094910038768f, -0.051615756197679f,
	-0.015182045838927f,  0.011949415510291f,
	 0.018981413448435f,  0.010204314627992f,
	-0.002410076268276f, -0.008697733303330f,
	-0.005994389201970f,  0.001355815246317f,
	 0.006823188093192f,  0.006734308458208f,
	 0.002187793653660f, -0.002744505321971f,
	-0.004519384154389f
};