Patent ID: 7804912
Filing Date: 2010-09-28
Classification: H04K,H04L

Abstract:
1. A method for encrypting a wireless transmission comprising: receiving a plurality of symbols, wherein the plurality of symbols comprises symbols associated with user data and symbols associated with pilot data; shifting a phase of each symbol of the plurality of symbols to produce a plurality of phase shifted symbols, wherein shifting comprises shifting a phase of each symbol that is associated with user data to produce a plurality of phase shifted symbols and not shifting a phase of each symbol that is associated with pilot data to produce a plurality of non-shifted symbols; modulating each phase shifted symbol of the plurality of phase shifted symbols with a first orthogonal subcarrier and modulating each non-shifted symbol of the plurality of non-shifted symbols with a second orthogonal subcarrier to produce a plurality of modulated subcarriers; and transmitting the plurality of modulated subcarriers via a wireless link.