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A Coherent-based Symbol Detector for 2.45GHz LR-WPAN Receiver  

Han Jung-Su (성균관대학교 정보통신공학부)
Do Joo-Hyun (성균관대학교 정보통신공학부)
Park Tha-Joon (삼성전기 중앙연구소)
Choi Hyung-Jin (삼성전기 중앙연구소)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.2A, 2006 , pp. 176-186 More about this Journal
Abstract
In this paper, we propose an enhanced symbol detector algorithm for 2.45GHz LR-WPAN(Low-Rate Wireless Personal Area Network) receiver. Because the frequency offset of $\pm$80ppm on 2.45GHz band is recommended in IEEE 802.15.4 LR-WPAN(Low-Rate Wireless Personal Area Network) specification, a symbol detector algorithm having stable operation in the channel environment with large frequency offset is required. For robustness to the frequency offset, non-coherent detection-based symbol detector algorithm is typically applied in the LR-WPAN receiver modem. However, the noncoherent symbol detector has increased performance degradation and hardware complexity due to squaring loss of I/Q squaring operation. Therefore we propose a coherent detection-based symbol detector algorithm with frequency offset compensation using a preamble symbol. The proposed algorithm is more suitable for LR-WPAN receiver aimed at low-cost, low-power and low-complexity than the non-coherent symbol detector, since it can reduce performance degradation due to squaring loss of I/Q squaring operation and implementation complexity. Simulation results show that the proposed algorithm has performance improvement of about 1dB in various channel environments.
Keywords
LR-WPAN; IEEE 802.15.4; ZigBee; Symbol Detector;
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  • Reference
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