| Paper: | ITT-P3.8 | ||
| Session: | Cryptography and Watermarking; Manufacturing Applications | ||
| Time: | Friday, May 21, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Industry Technology Track: DSP-Based Cryptography, Stenography, and Watermarking | ||
| Title: | RADIO FREQUENCY WATERMARKING FOR OFDM WIRELESS NETWORKS | ||
| Authors: | John Kleider; General Dynamics Decision Systems | ||
| Steve Gifford; General Dynamics Decision Systems | |||
| Scott Chuprun; General Dynamics Decision Systems | |||
| Bruce Fette; General Dynamics Decision Systems | |||
| Abstract: | Digital watermarking typically allows embedded signals to be separated from audio and video signals for purposes such as copyright protection, distribution tracing, authentication, and authorized access control. In this work we apply watermarking to the physical layer of the wireless baseband modulation waveform, with the motivation to improve flexibility and efficiency of authentication processes in a secure wireless network. We present two baseband watermarking methods called constellation dithering (CD) and baud dithering (BD) applied to Orthogonal Frequency Division Multiplexing (OFDM). We provide the watermark detection and capacity performance attributes in an additive white Gaussian noise (AWGN) channel. Both watermarking techniques allow interoperability with uninformed systems (such as receivers in the 802.11 WLAN commercial standard). Results indicate that, while the BD method provides higher detection robustness and capacity, the CD method exhibits more performance flexibility and is easily modified to the desired user characteristics. | ||
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