Moved gr-radar out of trunk for now. Needs portability cleanup.

Not to mention some functionality...


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4258 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 0 insertions, 62 deletions

diff --git a/gr-radar/src/python/signal_levels.py b/gr-radar/src/python/signal_levels.py
deleted file mode 100755
index f21f7f8bc..000000000
--- a/gr-radar/src/python/signal_levels.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/usr/bin/env python
-
-import sys
-from math import pi, log10
-from gnuradio.eng_notation import num_to_str
-
-def power_density(transmitted_power, distance):
-    """
-    Estimate power density in Watts/meter.
-    Assume isotropic radiator (spherical radiation pattern).
-
-    @param transmitted_power: Watts
-    @param distance: distance from transmitter in meters
-
-    """
-    return transmitted_power / (4 * pi * distance * distance)
-
-
-def ratio_of_target_return_to_direct(Rl, Rt, Rr, rcs):
-    """
-    Estimate relative strength of signal levels for direct and reflected
-    path in bistatic radar.  Assume all antenna factors are constant,
-    and hence 'wash out'.  Also assume that the antennas are isotropic
-    radiators (spherical radiation pattern).
-
-    @param Rl:  distance between Tx and Rx in meters
-    @param Rt:  distance between Tx and target in meters
-    @param Rr:  distance between Rx and target in meters
-    @param rcs: radar cross section in meters^2
-
-    @returns: ratio of reflected to direct in decibels
-    """
-    Tx_power = 1
-    direct_path_power_density = power_density(Tx_power, Rl)
-    power_at_target = power_density(Tx_power, Rt) * rcs
-    reflected_path_power_density = power_density(power_at_target, Rr)
-    return 10*log10(reflected_path_power_density / direct_path_power_density)
-
-
-def print_header(f):
-    f.write("   Rl      Rt      Rr      rcs      dB\n")
-    f.write("-----------------------------------------\n")
-    
-def print_result(f, Rl, Rt, Rr, rcs, dB):
-    f.write("%6sm %6sm %6sm %6s  %6s\n" %  tuple([num_to_str(x) for x in [Rl, Rt, Rr, rcs, dB]]))
-
-def calc_print(f, Rl, Rt, Rr, rcs):
-    print_result(f, Rl, Rt, Rr, rcs, ratio_of_target_return_to_direct(Rl, Rt, Rr, rcs))
-    
-def main():
-    f = sys.stdout
-    print_header(f)
-    calc_print(f, 40e3, 100e3, 100e3, 10.0)
-    calc_print(f, 40e3,  80e3,  80e3, 10.0)
-    calc_print(f, 40e3,  40e3,  40e3, 10.0)
-    calc_print(f, 40e3,  40e3,   8e3, 10.0)
-    calc_print(f, 40e3,  60e3,  20e3, 10.0)
-    calc_print(f, 40e3,  20e3,  60e3, 10.0)
-
-    
-if __name__ == '__main__':
-    main()