aboutsummaryrefslogtreecommitdiffstats
path: root/python/receiver
diff options
context:
space:
mode:
authorptrkrysik <ptrkrysik@gmail.com>2015-04-04 12:20:50 +0200
committerptrkrysik <ptrkrysik@gmail.com>2015-04-04 12:20:50 +0200
commit85b6c55c02c01ea4ca94bb60d52208705e0f2b17 (patch)
treef5742e9947aa2a78c09e1d4b76fe681c7db40e8c /python/receiver
parent5213e1d6628c87a666184b1e52e3912ca6df2152 (diff)
Removed redundant CMakeList.txt
Diffstat (limited to 'python/receiver')
-rw-r--r--python/receiver/clock_offset_control.py101
1 files changed, 0 insertions, 101 deletions
diff --git a/python/receiver/clock_offset_control.py b/python/receiver/clock_offset_control.py
deleted file mode 100644
index 5f328a9..0000000
--- a/python/receiver/clock_offset_control.py
+++ /dev/null
@@ -1,101 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-#
-# Copyright 2014 Piotr Krysik <ptrkrysik@gmail.com>
-#
-# This 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.
-#
-# This software 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 software; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-from numpy import *
-from gnuradio import gr
-import pmt
-from threading import Timer
-
-class clock_offset_control(gr.basic_block):
- """
- docstring for block clock_offset_control
- """
- def __init__(self, fc):
- gr.basic_block.__init__(self,
- name="gsm_clock_offset_control",
- in_sig=[],
- out_sig=[])
- self.fc = fc
- self.message_port_register_in(pmt.intern("measurements"))
- self.set_msg_handler(pmt.intern("measurements"), self.process_measurement)
- self.message_port_register_out(pmt.intern("ppm"))
- self.alfa = 0.3
- self.ppm_estimate = -1e6
- self.first_measurement = True
- self.counter = 0
- self.last_state = ""
- self.timer = Timer(0.5, self.timed_reset)
- self.last_ppm_estimate = -1e6
-
- def process_measurement(self,msg):
- if pmt.is_tuple(msg):
- key = pmt.symbol_to_string(pmt.tuple_ref(msg,0))
- if key == "freq_offset":
- freq_offset = pmt.to_double(pmt.tuple_ref(msg,1))
- ppm = -freq_offset/self.fc*1.0e6
- state = pmt.symbol_to_string(pmt.tuple_ref(msg,2))
-
- self.last_state = state
-
- if abs(ppm) > 100: #safeguard against flawed measurements
- ppm = 0
- self.reset()
-
- if state == "fcch_search":
- msg_ppm = pmt.from_double(ppm)
- self.message_port_pub(pmt.intern("ppm"), msg_ppm)
- self.timer.cancel()
- self.timer = Timer(0.5, self.timed_reset)
- self.timer.start()
- elif state == "synchronized":
- self.timer.cancel()
- if self.first_measurement:
- self.ppm_estimate = ppm
- self.first_measurement = False
- else:
- self.ppm_estimate = (1-self.alfa)*self.ppm_estimate+self.alfa*ppm
-
- if self.counter == 5:
- self.counter = 0
- if abs(self.last_ppm_estimate-self.ppm_estimate) > 0.1:
- msg_ppm = pmt.from_double(ppm)
- self.message_port_pub(pmt.intern("ppm"), msg_ppm)
- self.last_ppm_estimate = self.ppm_estimate
- else:
- self.counter=self.counter+1
- elif state == "sync_loss":
- self.reset()
- msg_ppm = pmt.from_double(0.0)
- self.message_port_pub(pmt.intern("ppm"), msg_ppm)
-
-
- def timed_reset(self):
- if self.last_state != "synchronized":
-# print "conditional reset"
- self.reset()
- msg_ppm = pmt.from_double(0.0)
- self.message_port_pub(pmt.intern("ppm"), msg_ppm)
-
- def reset(self):
- self.ppm_estimate = -1e6
- self.counter = 0
- self.first_measurement = True
-