Update 48k version

In to NXDN possible problem on sinc filter anc isinc filter, think they must be recalculated but do not know how to do it. On D-STAR, DMR, C4FM and P25 it work.

CalRSSI.h

@@ -0,0 +1,38 @@
+/*
+ *   Copyright (C) 2016 by Jonathan Naylor G4KLX
+ *
+ *   This program 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 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(CALRSSI_H)
+#define  CALRSSI_H
+
+#include "Config.h"
+
+class CCalRSSI {
+public:
+  CCalRSSI();
+
+  void samples(const uint16_t* rssi, uint8_t length);
+
+private:
+  uint32_t m_count;
+  uint32_t m_accum;
+  uint16_t m_min;
+  uint16_t m_max;
+};
+
+#endif
+