| Paper: | SPTM-L2.2 | ||
| Session: | Networks and Communication Systems Modeling | ||
| Time: | Tuesday, May 18, 15:50 - 16:10 | ||
| Presentation: | Lecture | ||
| Topic: | Signal Processing Theory and Methods: System Modeling, Representation, & Identification | ||
| Title: | JOINT SEMIBLIND CHANNEL IDENTIFICATION IN PUNCTURED ARQ RETRANSMISSIONS | ||
| Authors: | Jeremy Roberson; University of California, Davis | ||
| Zhi Ding; University of California, Davis | |||
| Abstract: | We study the channel estimation of a bandwidth efficient automatic repeat request (ARQ) system in which re-transmissions are symbol or bit-wise punctured. Unlike simple ARQ in which an erroneous packet is re-transmitted, many hybrid ARQ systems aim to conserve bandwidth by only retransmitting a punctured or re-coded data packet. In this paper, we formulate a jointsemiblind channel estimation algorithm for the punctured re-transmission in a hybrid ARQ network. We show that the joint semiblind estimation is quite simple and naturally combines training in the first transmission with retransmitted data statistics. We show that bandwidth savings resulting from puncturing the retransmission only lead to marginal degradation to the accuracy of channel estimation. | ||
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