analog: adding pwr_squelch blocks to gr-analog with QA and GRC.

1 files changed, 73 insertions, 0 deletions

diff --git a/gr-analog/lib/pwr_squelch_ff_impl.cc b/gr-analog/lib/pwr_squelch_ff_impl.cc
new file mode 100644
index 000000000..c6bb6af90
--- /dev/null
+++ b/gr-analog/lib/pwr_squelch_ff_impl.cc
@@ -0,0 +1,73 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006,2010,2012 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "pwr_squelch_ff_impl.h"
+
+namespace gr {
+  namespace analog {
+
+    pwr_squelch_ff::sptr
+    pwr_squelch_ff::make(double threshold, double alpha,
+			 int ramp, bool gate)
+    {
+      return gnuradio::get_initial_sptr
+	(new pwr_squelch_ff_impl(threshold, alpha, ramp, gate));
+    }
+
+    pwr_squelch_ff_impl::pwr_squelch_ff_impl(double threshold, double alpha,
+					     int ramp, bool gate)
+      :	gr_block("pwr_squelch_ff",
+		 gr_make_io_signature(1, 1, sizeof(float)),
+		 gr_make_io_signature(1, 1, sizeof(float))),
+	squelch_base_ff_impl("pwr_squelch_ff", ramp, gate),
+	d_iir(alpha)
+    {
+      set_threshold(threshold);
+    }
+
+    pwr_squelch_ff_impl::~pwr_squelch_ff_impl()
+    {
+    }
+
+    std::vector<float>
+    pwr_squelch_ff_impl::squelch_range() const
+    {
+      std::vector<float> r(3);
+      r[0] = -50.0;			// min	FIXME
+      r[1] = +50.0;			// max	FIXME
+      r[2] = (r[1] - r[0]) / 100;	// step size
+
+      return r;
+    }
+
+    void
+    pwr_squelch_ff_impl::update_state(const float &in)
+    {
+      d_pwr = d_iir.filter(in*in);
+    }
+
+  } /* namespace analog */
+} /* namespace gr */