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Symbol Synchronization Technique using Bit Decision Window for Non-Coherent IR-UWB Systems  

Lee, Soon-Woo (Korea Electrotechnology Research Institute(KERI))
Park, Young-Jin (Korea Electrotechnology Research Institute(KERI))
Kim, Kwan-Ho (Korea Electrotechnology Research Institute(KERI))
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.44, no.2, 2007 , pp. 15-21 More about this Journal
Abstract
In this paper, we propose a technique of a practical symbol acquisition and tracking using a low complex ADC and simple digital circuits for noncoherent asynchronous impulse-radio-based Ultra Wideband (IR-UWB) receiver based on energy detection. Compared to previous approaches of detecting an exact acquisition time that require much hardware resource, the proposed technique is to detect the target symbol by finding the symbol acquisition interval per symbol with a target symbo, thus the complexity of the complete signal processing and power consumption by ADC are reduced. To do this, we define the bit decision window (BDW) and analyze the relation between SNR, hardware resource, size of BDW and BER(Bit Error Rate). Using the results, the optimum BDW size for the minimum BER with limited hardware resource is selected. The proposed synchronization technique is verified with an aid of a simulator programmed by considering practical impulse channels.
Keywords
Noncoherent IR-UWB; symbol synchronization;
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