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Performance Comparison of Coherent and Non-Coherent Detection Schemes in LR-UWB System  

Kwon, Soonkoo (Department of Electrical and Electronic Engineering, Yonsei University)
Ji, Sinae (Department of Electrical and Electronic Engineering, Yonsei University)
Kim, Jaeseok (Department of Electrical and Electronic Engineering, Yonsei University)
Publication Information
Journal of Communications and Networks / v.14, no.5, 2012 , pp. 518-523 More about this Journal
Abstract
This paper presents new coherent and non-coherent detection methods for the IEEE 802.15.4a low-rate ultra-wideband physical layer with forward error correction (FEC) coding techniques. The coherent detection method involving channel estimation is based on the correlation characteristics of the preamble signal. A coherent receiver uses novel iterated selective-rake (IT-SRAKE) to detect 2-bit data in a non-line-of-sight channel. The non-coherent detection method that does not involve channel estimation employs a 2-bit data detection scheme using modified transmitted reference pulse cluster (M-TRPC) methods. To compare the two schemes, we have designed an IT-SRAKE receiver and a MTRPC receiver using an IEEE 802.15.4a physical layer. Simulation results show the performance of IT-SRAKE is better than that of the M-TRPC by 3-9 dB.
Keywords
Channel estimation; coherent detection; IEEE 802.15.4a; non-coherent detection; selective rake (S-RAKE) receiver; transmitted reference pulse cluster (TRPC);
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