/*! \brief A Costas loop carrier recovery module.
- * \ingroup clock
+ * \ingroup sync_blk
*
* The Costas loop locks to the center frequency of a signal and
* downconverts it to baseband. The second (order=2) order loop is
*
* \param alpha the loop gain used for phase adjustment
* \param beta the loop gain for frequency adjustments
- * \param max_freq the maximum frequency deviation (normalized frequency) the loop can handle
- * \param min_freq the minimum frequency deviation (normalized frequency) the loop can handle
+ * \param max_freq the maximum frequency deviation (radians/sample) the loop can handle
+ * \param min_freq the minimum frequency deviation (radians/sample) the loop can handle
* \param order the loop order, either 2 or 4
*/
class gr_costas_loop_cc;
/*!
* \brief Carrier tracking PLL for QPSK
- * \ingroup clock
+ * \ingroup sync_blk
* input: complex; output: complex
* <br>The Costas loop can have two output streams:
* stream 1 is the baseband I and Q;
float phase_detector_4(gr_complex sample) const; // for QPSK
/*! \brief the phase detector circuit for second-order loops
- * \param a complex sample
+ * \param sample a complex sample
* \return the phase error
*/
float phase_detector_2(gr_complex sample) const; // for BPSK