Non-Coherent Fourth-Order Detector for Impulse Radio Ultra Wideband Systems: Empirical Evaluation Using Channel Measurements

Authors:
Muhammad Gufran Khan;Benny Sällberg;Jörgen Nordberg;Fredrik Tufvesson;Ingvar Claesson
Affiliations:
Department of Electrical Engineering, School of Engineering, Blekinge Institute of Technology, Karlskrona, Sweden SE371 75;Department of Electrical Engineering, School of Engineering, Blekinge Institute of Technology, Karlskrona, Sweden SE371 75;Department of Electrical Engineering, School of Engineering, Blekinge Institute of Technology, Karlskrona, Sweden SE371 75;Department of Electrical and Information Technology, Lund University, Lund, Sweden SE221 00;Department of Electrical Engineering, School of Engineering, Blekinge Institute of Technology, Karlskrona, Sweden SE371 75
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

Citing 3
Cited 0

Comparison between coherent and noncoherent receivers for UWB communications

EURASIP Journal on Applied Signal Processing
Energy-Detection UWB Receivers with Multiple Energy Measurements

IEEE Transactions on Wireless Communications
Performance of ultra-wideband communications with suboptimal receivers in multipath channels

IEEE Journal on Selected Areas in Communications

Quantified Score

Hi-index	0.00

Visualization

Abstract

Low-complex and low-power non-coherent energy detectors (EDs) are interesting for low data rate impulse radio (IR) ultra wideband (UWB) systems, but suffer from a loss in performance compared to coherent receivers. The performance of an ED also strongly depends on the integration interval (window size) of the integrator and the window position. This paper presents a non-coherent fourth-order detector (FD) which can discriminate between Gaussian noise signals and non-Gaussian IR-UWB signals by directly estimating the fourth-order moment of the received signal. The performance of the detectors is evaluated using realistic channels measured in a corridor, an office and a laboratory environment. The results show that bit-error-rate (BER) performance of the proposed FD receiver is slightly better than the ED in low signal-to-noise ratio (SNR) region and its performance improves as the SNR increases. In addition, BER of the FD receiver is less sensitive to overestimation of the integration interval making it relatively robust to variations of the channel delay spread. Finally, a criteria for the selection of integration time of the proposed detector is suggested.