Patent ID: 8842834
Filing Date: 2014-09-23
Classification: H04K,H04L,H04W

Abstract:
1. A method for transmitting voice data in a secure communication system, comprising: transmitting voice data using a plurality of data packets, where the voice data is spread amongst the plurality of data packets; embedding a cryptographic message indicator into a packet header of each of the plurality of data packets used to transmit the voice data; demodulating data packets from the plurality of data packets received at a packet receiver into a plurality of bit soft-decisions; code-combining bit soft-decisions from only the cryptographic message indicator from a given data packet of the plurality of data packets received at the packet receiver with bit soft-decisions for the cryptographic message indicator from previously received data packets of the plurality of data packets to form a code-combining history; decoding the code-combining history at the packet receiver to derive the cryptographic message indicator; and decoding, at the packet receiver, the bit soft-decisions associated with the voice data in the plurality of data packets without the use of code-combining.