Quantization Aspects in LDPC Key Reconciliation for Physical Layer Security
Conference: SCC 2015 - 10th International ITG Conference on Systems, Communications and Coding
02/02/2015 - 02/05/2015 at Hamburg, Germany
Proceedings: SCC 2015
Pages: 6Language: englishTyp: PDF
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Authors:
Graur, Oana; Islam, Nazia; Filip, Alexandra; Henkel, Werner (Jacobs University Bremen, Electrical Engineering and Computer Science, Bremen, Germany)
Abstract:
For physical-layer security, key reconciliation procedures are needed to correct key differences that can arise as a consequence of independent noise at the two ends of a reciprocal link. We assume either a random link in a mobile environment or use reconfigurable antenna elements to randomize the channel, such that it allows for frequent key generation. We apply LDPC codes to reconcile the keys on both sides. In here, we derive the LLRs taking into account the underlying quantization.