Method getNormalSNR

GSM/GSMTransfer.cpp:420–428

(pat 1-2014) Compute the SNR of an RxBurst that is a GSM "normal burst", ie, one used for TCH/FACCH rather than for RACCH or other. For this case we ignore the tail bits and training bits and consider only the data bits.

// one used for TCH/FACCH rather than for RACCH or other.
// For this case we ignore the tail bits and training bits and consider only the data bits.
float RxBurst::getNormalSNR() const
{
	SoftVector chunk1(this->segment(3,58));	// 57 data bits + stealing bit.
	float snr1 = chunk1.getSNR();
	SoftVector chunk2(this->segment(87,58));	// stealing bit + 57 data bits.
	float snr2 = chunk2.getSNR();
	assert(! chunk1.isOwner());	// Make sure the stupid SoftVector class really returned an alias.
	return (snr1 + snr2) / 2.0;
}