Added vector smoothing, removed record reversal

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@5699 221aa14e-8319-0410-a670-987f0aec2ac5

diff --git a/gr-sounder/src/python/sounder.py b/gr-sounder/src/python/sounder.py
index ce00e964d0e1c11113da5d225fe42b0b9a9b812d..7a6157125ec048299c6a36b703f0d83a1b237ef3 100644 (file)
--- a/gr-sounder/src/python/sounder.py
+++ b/gr-sounder/src/python/sounder.py
@@ -76,10 +76,11 @@ class sounder_tx:
         self._u._write_fpga_reg(FR_AMPL, self._amplitude)
 
 class sounder_rx:
-    def __init__(self,subdev_spec=None,gain=None,length=1,msgq=None,loopback=False,verbose=False,debug=False):
+    def __init__(self,subdev_spec=None,gain=None,length=1,alpha=1.0,msgq=None,loopback=False,verbose=False,debug=False):
        self._subdev_spec = subdev_spec
         self._gain = gain
         self._length = length
+        self._alpha = alpha
         self._msgq = msgq
        self._loopback = loopback
        self._verbose = verbose
@@ -101,8 +102,11 @@ class sounder_rx:
             print "Generating impulse vectors of length", self._length, "byte length", self._vblen
             
         self._s2v = gr.stream_to_vector(gr.sizeof_gr_complex, self._length)
+       if self._verbose:
+           print "Using smoothing alpha of", self._alpha
+        self._lpf = gr.single_pole_iir_filter_cc(self._alpha, self._length)
         self._sink = gr.message_sink(self._vblen, self._msgq, True)
-        self._fg.connect(self._u, self._s2v, self._sink)
+        self._fg.connect(self._u, self._s2v, self._lpf, self._sink)
 
     def tune(self, frequency):
         if self._verbose:
@@ -145,7 +149,7 @@ class sounder_rx:
 
 class sounder:
     def __init__(self,transmit=False,receive=False,loopback=False,rx_subdev_spec=None,ampl=0x1FFF,
-                 frequency=0.0,rx_gain=None,degree=12,length=1,msgq=None,verbose=False,debug=False):
+                 frequency=0.0,rx_gain=None,degree=12,length=1,alpha=1.0,msgq=None,verbose=False,debug=False):
         self._transmit = transmit
         self._receive = receive
         self._loopback = loopback
@@ -155,6 +159,7 @@ class sounder:
         self._rx_gain = rx_gain
         self._degree = degree
         self._length = length
+        self._alpha = alpha
         self._msgq = msgq
         self._verbose = verbose
         self._debug = debug
@@ -171,8 +176,9 @@ class sounder:
             self._u = self._trans._u
             
        if self._receive:
-            self._rcvr = sounder_rx(subdev_spec=self._rx_subdev_spec,length=self._length,gain=self._rx_gain,
-                                   msgq=self._msgq,loopback=self._loopback,verbose=self._verbose, 
+            self._rcvr = sounder_rx(subdev_spec=self._rx_subdev_spec,length=self._length,
+                                    gain=self._rx_gain,alpha=self._alpha,msgq=self._msgq,
+                                    loopback=self._loopback,verbose=self._verbose, 
                                    debug=self._debug)
            self._u = self._rcvr._u # either receiver or transmitter object will do
        

diff --git a/gr-sounder/src/python/usrp_sounder.py b/gr-sounder/src/python/usrp_sounder.py
index 20f187114734cd25b3bbb419267d0cec8caef792..9c3f1bee9e90500fc521f630c197c8ae5b1e6f90 100755 (executable)
--- a/gr-sounder/src/python/usrp_sounder.py
+++ b/gr-sounder/src/python/usrp_sounder.py
@@ -54,6 +54,8 @@ def main():
                       help="enable debugging output, default is disabled")
     parser.add_option("-F", "--filename", default=None,
                      help="log received impulse responses to file")
+    parser.add_option("", "--alpha", type="eng_float", default=1.0,
+                     help="smoothing factor (0.0-1.0), default is %default (none)")
                      
     (options, args) = parser.parse_args()
 
@@ -78,9 +80,11 @@ def main():
            print "Logging impulse records to file: ", options.filename
            
     msgq = gr.msg_queue()
-    s = sounder(transmit=options.transmit,receive=options.receive,loopback=options.loopback,
-                rx_subdev_spec=options.rx_subdev_spec,frequency=options.frequency,rx_gain=options.gain,
-                degree=options.degree,length=length,msgq=msgq,verbose=options.verbose,ampl=options.amplitude,
+    s = sounder(transmit=options.transmit,receive=options.receive,
+                loopback=options.loopback,rx_subdev_spec=options.rx_subdev_spec,
+                frequency=options.frequency,rx_gain=options.gain,
+                degree=options.degree,length=length,alpha=options.alpha,
+                msgq=msgq,verbose=options.verbose,ampl=options.amplitude,
                 debug=options.debug)
     s.start()
 
@@ -95,10 +99,8 @@ def main():
                rec = msg.to_string()[:length*gr.sizeof_gr_complex]
                if options.debug:
                    print "Received impulse vector of length", len(rec)
-                recarray = numpy.fromstring(rec, dtype=numpy.complex64)
-                imparray = recarray[::-1]
-                data = imparray.tostring()
-               f.write(data)
+
+               f.write(rec)
                
         except KeyboardInterrupt:
             pass