spreading {TAIL ~ means} for spread spectrum processing the message data, synchronized with the generic chip code signal, as {HEAD ~ spread spectrum processed message data} 
spreading { TAIL ~ means } for spread spectrum processing the message data , synchronized with the generic chip code signal , as { HEAD ~ spread spectrum processed message data }
OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD