Abstract:

We discuss a secure wireless communication scheme, focusing on designing two major components: the key generation and the coding scheme. To achieve high key matching rate, we propose a feed-forward and feed-back quantization. The proposed scheme offers 1 dB improvement over the best known schemes. We also propose a universal quantization scheme with feed-forward/feed-back and show that its performance is the same as, or better than the other schemes which require prior distribution information. For rate-adaptive coding, we propose the use of rateless codes. Our evaluations show that the rateless code can offer significant performance gain over a low-density parity-check (LDPC) code. Moreover, we implement a soft input rateless decoder which offers additional gains. The overall security performance of our design based on these two components significantly outperforms existing designs.