Title :
Spherical codes for the Gaussian wiretap channel with continuous input alphabets
Author :
Almeida, Jorge ; Torezzan, C. ; Barros, Joao
Author_Institution :
Inst. de Telecomun., Univ. do Porto, Porto, Portugal
Abstract :
We address the problem of designing codes for transmission over a Gaussian wiretap channel when the source is continuously-valued. We show that spherical codes based on flat tori can provide a natural constructive method to design codes for secrecy. In particular, their geometrical properties allow to fine tune the code for prescribed levels of reliability and secrecy, while providing a basis for efficient encoding and decoding. We present a suitable parametrization for these codes which enables legitimate users to communicate under a small distortion, while forcing the eavesdropper to operate at large distortions.
Keywords :
Gaussian channels; channel coding; cryptography; decoding; telecommunication security; Gaussian wiretap channel; continuous input alphabets; decoding; distortion; encoding; flat tori; geometrical property; natural constructive method; spherical codes; Conferences; Decoding; Encoding; Lattices; Receivers; Reliability; Vectors;
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2013 IEEE 14th Workshop on
Conference_Location :
Darmstadt
DOI :
10.1109/SPAWC.2013.6612133