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Evaluation on detection capability of down-link signals of mobile WiMAX and 3GPP LTE for detect-and-avoid in UWB systems

The present article describes the experimental result of victim system detection by UWB wireless system to contribute for Japanese UWB regulatory discussion, in which a mitigation, including detect-and-avoid (DAA), technology implementation in the frequency range of 3.4 to 4.8 GHz is a major technical topic. A FPGA based MB-OFDM UWB receiver with 528 MHz sampling rate and 128 points FFT capability was prepared for this purpose and mobile WiMAX and 3GPP LTE were selected as victim systems to be detected. Various baseband victim signals generated by a vector signal generator were detected at various detect conditions and signal-to-noise ratios and time to detection was measured. In this experiment, 99% probability detection was achieved within 2.4 seconds.