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The authors 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, they propose a feed-forward and feed-back quantization. The proposed scheme offers 1 dB improvement over the best known schemes. They 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, they propose the use of rateless codes. Their evaluations show that the rateless code can offer significant performance gain over a Low-Density Parity-Check (LDPC) code.
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