def senderResponse(s): global message if s == "0": makeSignal(message + encode(message), bitTime) return False else: return True
def senderResponse(s):
global message
if s == "0":
makeSignal(appendCRC(message))
return False
else:
return True
def senderOriginal(s): global message message = s s = appendCRC(s) makeSignal(s)
def senderResponse(s): global message if s == "0": makeSignal(message) else: return
def sendIncorrect(correct, incorrect): crc = appendCRC(correct)[-2:] makeSignal(incorrect + crc)
else:
s[error] = '1'
return ''.join(s)
if __name__== "__main__":
#First Message
timer = float(raw_input("Please enter the bit rate you would like: "))
bitTime = timer
message = raw_input("Please enter the message that you want to transmit: ")
errors = raw_input("Please enter the indices of the errors: ").split()
for i in range(len(errors)):
errors[i] = int(errors[i])
suffix = encode(message)
errorMes = makeError(message, errors)
makeSignal(errorMes+suffix, bitTime)
while True:
response = raw_input("Please give us the message received from the receiver: ")
if senderResponse(response):
break
#Second Message
timer = float(raw_input("Please enter the bit rate you would like: "))
bitTime = timer
message = raw_input("Please enter the message that you want to transmit: ")
errors = raw_input("Please enter the indices of the errors: ").split()
for i in range(len(errors)):
errors[i] = int(errors[i])
suffix = encode(message)
errorMes = makeError(message, errors)
makeSignal(errorMes+suffix, bitTime)
def sendAck(b):
if b:
makeSignal("1", bitTime)
else:
makeSignal("0", bitTime)
def sendAck(b):
if b:
makeSignal("1")
else:
makeSignal("0")
global message
if s == "0":
makeSignal(appendCRC(message))
return False
else:
return True
def makeError(s, errors):
s = list(s)
for error in errors:
if s[error] == '1':
s[error] = '0'
else:
s[error] = '1'
return ''.join(s)
if __name__ == "__main__":
message = raw_input("Please enter the message that you want to transmit: ")
errors = raw_input("Please enter the indices of the errors: ").split()
for i in range(len(errors)):
errors[i] = int(errors[i])
crc = appendCRC(message)[-2:]
errorMes = makeError(message, errors)
makeSignal(errorMes + crc)
while True:
response = raw_input(
"Please give us the message received from the receiver: ")
if senderResponse(response):
break