Secret-Key Agreement With Public Discussion Subject to an Amplitude Constraint

• Published in: IEEE communications letters Vol. 20; no. 6; pp. 1124 - 1127
• Main Authors: Zorgui, Marwen, Rezki, Zouheir, Alomair, Basel, Alouini, Mohamed-Slim
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplitudes; Asymptotic properties; Capacity planning; Channel models; Channels; Codes; Computation; Electronic mail; Mathematical analysis; Optimization; Probability distribution; Random variables; Receivers; Searching; Upper bound; Upper bounds; Physical layer security; truncated Gaussian distribution; amplitude constraint

This letter considers the problem of secret-key agreement with public discussion subject to a peak power constraint A on the channel input. The optimal input distribution is proved to be discrete with finite support. To overcome the computationally heavy search for the optimal discrete distribution,...