jens
290fd5f5e0
git-svn-id: http://moon:8086/svn/software/trunk/libsrc/radio@1 b431acfa-c32f-4a4a-93f1-934dc6c82436
97 lines
2.7 KiB
C
Executable File
97 lines
2.7 KiB
C
Executable File
// --------------------------------------------------------------
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#ifndef EQUALIZER_H
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#define EQUALIZER_H
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#include "radio_types.h"
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#include "real.h"
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#include "cpx.h"
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// --------------------------------------------------------------
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#define CEF_MODE_NOP 0
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#define CEF_MODE_CMA 1
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#define CEF_MODE_DD 2
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#define CEF_MODE_EQ_UPD 3
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// --------------------------------------------------------------
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// Types
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// --------------------------------------------------------------
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typedef struct _eq_cpx_t
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{
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uint32_t N;
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cpx_t *pX, *pW;
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cpx_t *pW_conj;
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} eq_cpx_t;
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typedef struct _cma_t
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{
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uint32_t N, M;
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eq_cpx_t eq;
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radio_float_t Px, Px_last;
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} cma_t;
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typedef struct _dfe_cpx_t
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{
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uint32_t N, N_ff, N_fb;
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eq_cpx_t eq;
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} dfe_cpx_t;
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typedef struct _rls_t
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{
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uint32_t N, M;
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cpx_t *pX, *pW, *pZ, *pR, *pT;
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radio_float_t *R, *T, *T2, *z, *w, *x;
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} rls_t;
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// --------------------------------------------------------------
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#ifdef __cplusplus
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extern "C" {
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#endif
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// --------------------------------------------------------------
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// Functions
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// --------------------------------------------------------------
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// Helpers
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void CoeffComplexUnitAt(cpx_t *pW, uint32_t N, uint32_t dly);
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void CoeffComplexConv(cpx_t *pSrc, cpx_t *pDst, uint32_t N, uint32_t dly);
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// General Equalizer
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void EQComplexInit(eq_cpx_t *pObj, uint32_t N);
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void EQComplexFree(eq_cpx_t *pObj);
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cpx_t EQComplexProcess(eq_cpx_t *pObj, cpx_t x);
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// CMA Blind Adaption (uses EQComplex and LMSUpdate)
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void CMAInit(cma_t *pObj, uint32_t ntaps);
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void CMAFree(cma_t *pObj);
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cpx_t CMAProcess(cma_t *pObj, cpx_t x);
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void CMATrainGodard(cma_t *pObj, cpx_t sym_s_eq, radio_float_t mag_h, radio_float_t R2, radio_float_t mu);
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// MMA
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void MMATrain(cma_t *pObj, cpx_t sym_s_eq, cpx_t R, radio_float_t mu);
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void SMMATrain(cma_t *pObj, cpx_t sym_s_eq, radio_float_t mag_h, cpx_t R, radio_float_t mu);
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// DFE Decision Directed Adaption (uses EQComplex and LMSUpdate)
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void DFEComplexInit(dfe_cpx_t *pObj, uint32_t K);
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void DFEComplexFree(dfe_cpx_t *pObj);
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cpx_t DFEComplexProcess(dfe_cpx_t *pObj, cpx_t xs, cpx_t xh);
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void DFEAdaptLMS(dfe_cpx_t *pObj, cpx_t e, radio_float_t mu);
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// LMS Adaption
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void LMSUpdateWeigths(eq_cpx_t *pObj, cpx_t e, radio_float_t mu);
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// RLS Adaption
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void RLSInit(rls_t *pObj, uint32_t N, uint32_t M);
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void RLSFree(rls_t *pObj);
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cpx_t RLSProcess(rls_t *pObj, radio_float_t i, radio_float_t q);
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radio_float_t RLSUpdate(rls_t *pObj, radio_float_t rho, radio_float_t mu, radio_float_t y, radio_float_t d);
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// --------------------------------------------------------------
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#ifdef __cplusplus
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}
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#endif
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// --------------------------------------------------------------
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#endif // EQUALIZER_H
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