Added Extract CSI block.

This block takes PDU messages as input, looks for a "csi" entry in the meta dictionary, and if found outputs a complex CSI vector on a stream output. The meta is also sent along as stream tags.

grc/CMakeLists.txt

@@ -22,6 +22,7 @@ install(FILES
     ieee802_11_chunks_to_symbols.block.yml
     ieee802_11_decode_mac.block.yml
     ieee802_11_ether_encap.block.yml
+    ieee802_11_extract_csi.block.yml
     ieee802_11_frame_equalizer.block.yml
     ieee802_11_mac.block.yml
     ieee802_11_mapper.block.yml

grc/ieee802_11_extract_csi.block.yml

@@ -0,0 +1,21 @@
+id: ieee802_11_extract_csi
+label: Extract CSI
+category: '[IEEE802.11]'
+
+templates:
+  imports: import ieee802_11
+  make: ieee802_11.extract_csi()
+
+inputs:
+- label: pdu in
+  domain: message
+  optional: false
+
+outputs:
+- label: csi out
+  domain: stream
+  dtype: complex
+  vlen: 52
+  optional: false
+
+file_format: 1