diff --git a/lib/equalizer/base.cc b/lib/equalizer/base.cc
index 0124481..a851671 100644
--- a/lib/equalizer/base.cc
+++ b/lib/equalizer/base.cc
@@ -40,3 +40,7 @@ const gr_complex base::POLARITY[127] = {
 	-1, 1,-1,-1, 1,-1, 1, 1, 1, 1,-1, 1,-1, 1,-1, 1,
 	-1,-1,-1,-1,-1, 1,-1, 1, 1,-1, 1,-1, 1, 1, 1,-1,
 	-1, 1,-1,-1,-1, 1, 1, 1,-1,-1,-1,-1,-1,-1,-1 };
+
+const gr_complex* base::get_csi() {
+	return d_H;
+}
diff --git a/lib/equalizer/base.h b/lib/equalizer/base.h
index 279c33e..ae187bb 100644
--- a/lib/equalizer/base.h
+++ b/lib/equalizer/base.h
@@ -33,6 +33,8 @@ public:
 
 	static const gr_complex POLARITY[127];
 
+	const gr_complex* get_csi();
+
 protected:
 	static const gr_complex LONG[64];