diff options
Diffstat (limited to 'Transceiver52M/sigProcLib.h')
| -rw-r--r-- | Transceiver52M/sigProcLib.h | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/Transceiver52M/sigProcLib.h b/Transceiver52M/sigProcLib.h index 4318fe0..9bc7e10 100644 --- a/Transceiver52M/sigProcLib.h +++ b/Transceiver52M/sigProcLib.h @@ -25,14 +25,6 @@ #define EDGE_BURST_NBITS 444 #define EDGE_BURST_NSYMS (EDGE_BURST_NBITS / 3) -/** Convolution type indicator */ -enum ConvType { - START_ONLY, - NO_DELAY, - CUSTOM, - UNDEFINED, -}; - /** Codes for burst types of received bursts*/ enum CorrType{ OFF, ///< timeslot is off @@ -41,8 +33,6 @@ enum CorrType{ EDGE, ///< timeslot should contain an EDGE burst IDLE ///< timeslot is an idle (or dummy) burst }; -std::string corrTypeToString(CorrType corr); -std::ostream& operator<<(std::ostream& os, CorrType corr); enum SignalError { SIGERR_NONE, @@ -61,66 +51,12 @@ enum SignalError { */ #define BURST_THRESH 4.0 -/** Convert a linear number to a dB value */ -float dB(float x); - -/** Convert a dB value into a linear value */ -float dBinv(float x); - -/** Compute the energy of a vector */ -float vectorNorm2(const signalVector &x); - -/** Compute the average power of a vector */ -float vectorPower(const signalVector &x); - /** Setup the signal processing library */ bool sigProcLibSetup(); /** Destroy the signal processing library */ void sigProcLibDestroy(void); -/** - Convolve two vectors. - @param a,b The vectors to be convolved. - @param c, A preallocated vector to hold the convolution result. - @param spanType The type/span of the convolution. - @return The convolution result or NULL on error. -*/ -signalVector *convolve(const signalVector *a, const signalVector *b, - signalVector *c, ConvType spanType, - size_t start = 0, size_t len = 0, - size_t step = 1, int offset = 0); - -/** - Frequency shift a vector. - @param y The frequency shifted vector. - @param x The vector to-be-shifted. - @param freq The digital frequency shift - @param startPhase The starting phase of the oscillator - @param finalPhase The final phase of the oscillator - @return The frequency shifted vector. -*/ -signalVector* frequencyShift(signalVector *y, - signalVector *x, - float freq = 0.0, - float startPhase = 0.0, - float *finalPhase=NULL); - -/** - Correlate two vectors. - @param a,b The vectors to be correlated. - @param c, A preallocated vector to hold the correlation result. - @param spanType The type/span of the correlation. - @return The correlation result. -*/ -signalVector* correlate(signalVector *a, - signalVector *b, - signalVector *c, - ConvType spanType, - bool bReversedConjugated = false, - unsigned startIx = 0, - unsigned len = 0); - /** Operate soft slicer on a soft-bit vector */ bool vectorSlicer(SoftVector *x); @@ -148,45 +84,6 @@ signalVector *genRandAccessBurst(int delay, int sps, int tn); /** Generate a dummy GSM burst - 4 or 1 SPS */ signalVector *generateDummyBurst(int sps, int tn); -/** Sinc function */ -float sinc(float x); - -/** Delay a vector */ -signalVector *delayVector(const signalVector *in, signalVector *out, float delay); - -/** Add two vectors in-place */ -bool addVector(signalVector &x, - signalVector &y); - -/** Multiply two vectors in-place*/ -bool multVector(signalVector &x, - signalVector &y); - -/** Generate a vector of gaussian noise */ -signalVector *gaussianNoise(int length, - float variance = 1.0, - complex mean = complex(0.0)); - -/** - Given a non-integer index, interpolate a sample. - @param inSig The signal from which to interpolate. - @param ix The index. - @return The interpolated signal value. -*/ -complex interpolatePoint(const signalVector &inSig, - float ix); - -/** - Given a correlator output, locate the correlation peak. - @param rxBurst The correlator result. - @param peakIndex Pointer to value to receive interpolated peak index. - @param avgPower Power to value to receive mean power. - @return Peak value. -*/ -complex peakDetect(const signalVector &rxBurst, - float *peakIndex, - float *avgPwr); - /** Apply a scalar to a vector. @param x The vector of interest. @@ -203,68 +100,6 @@ void scaleVector(signalVector &x, */ float energyDetect(const signalVector &rxBurst, unsigned windowLength); - -/** - RACH aka Access Burst correlator/detector. - @param burst The received GSM burst of interest. - @param threshold The threshold that the received burst's post-correlator SNR is compared against to determine validity. - @param sps The number of samples per GSM symbol. - @param amplitude The estimated amplitude of received RACH burst. - @param toa The estimate time-of-arrival of received RACH burst. - @param max_toa The maximum expected time-of-arrival - @return 1 if threshold value is reached, - negative value (-SignalError) on error, - zero (SIGERR_NONE) if no burst is detected -*/ -int detectRACHBurst(const signalVector &burst, - float threshold, - int sps, - complex &litude, - float &toa, - unsigned max_toa); - -/** - GMSK Normal Burst correlator/detector. - @param rxBurst The received GSM burst of interest. - @param tsc Midamble type (0..7) also known as TSC - @param threshold The threshold that the received burst's post-correlator SNR is compared against to determine validity. - @param sps The number of samples per GSM symbol. - @param amplitude The estimated amplitude of received TSC burst. - @param toa The estimate time-of-arrival of received TSC burst. - @param max_toa The maximum expected time-of-arrival - @return 1 if threshold value is reached, - negative value (-SignalError) on error, - zero (SIGERR_NONE) if no burst is detected -*/ -int analyzeTrafficBurst(const signalVector &burst, - unsigned tsc, - float threshold, - int sps, - complex &litude, - float &toa, - unsigned max_toa); - -/** - EDGE/8-PSK Normal Burst correlator/detector - @param burst The received GSM burst of interest - @param tsc Midamble type (0..7) also known as TSC - @param threshold The threshold that the received burst's post-correlator SNR is compared against to determine validity. - @param sps The number of samples per GSM symbol. - @param amplitude The estimated amplitude of received TSC burst. - @param toa The estimate time-of-arrival of received TSC burst. - @param max_toa The maximum expected time-of-arrival - @return 1 if threshold value is reached, - negative value (-SignalError) on error, - zero (SIGERR_NONE) if no burst is detected -*/ -int detectEdgeBurst(const signalVector &burst, - unsigned tsc, - float threshold, - int sps, - complex &litude, - float &toa, - unsigned max_toa); - /** 8-PSK/GMSK/RACH burst detector @param burst The received GSM burst of interest @@ -287,44 +122,6 @@ int detectAnyBurst(const signalVector &burst, float &toa, unsigned max_toa); -/** - Downsample 4 SPS to 1 SPS using a polyphase filterbank - @param burst Input burst of at least 624 symbols - @return Decimated signal vector of 156 symbols -*/ -signalVector *downsampleBurst(const signalVector &burst); - -/** - Decimate a vector. - @param wVector The vector of interest. - @param factor Decimation factor. - @return The decimated signal vector. -*/ -signalVector *decimateVector(signalVector &wVector, size_t factor); - -/** - Demodulates a GMSK burst using a soft-slicer. - @param rxBurst The burst to be demodulated. - @param gsmPulse The GSM pulse. - @param sps The number of samples per GSM symbol. - @param channel The amplitude estimate of the received burst. - @param TOA The time-of-arrival of the received burst. - @return The demodulated bit sequence. -*/ -SoftVector *demodGmskBurst(const signalVector &rxBurst, int sps, - complex channel, float TOA); - -/** - Demodulate 8-PSK EDGE burst with soft symbol ooutput - @param rxBurst The burst to be demodulated. - @param sps The number of samples per GSM symbol. - @param channel The amplitude estimate of the received burst. - @param TOA The time-of-arrival of the received burst. - @return The demodulated bit sequence. -*/ -SoftVector *demodEdgeBurst(const signalVector &rxBurst, int sps, - complex channel, float TOA); - /** Demodulate burst basde on type and output soft bits */ SoftVector *demodAnyBurst(const signalVector &burst, int sps, complex amp, float toa, CorrType type); |