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A New Pseudo-random Pulse Sequences Aided Noise Suppression Scheme for UWB Transmitted Reference Communication System


Gang Yang, Ren Shi


Vol. 7  No. 2  pp. 238-242


Recently Ultra-wideband (UWB) transmitted reference (TR) system has drawn considerable attention in many wireless sensor network location applications due to its low complexity. Its major drawback is serious performance degradation for a very noisy correlation template. In this paper, a new noise suppression scheme for UWB-TR communication system is presented by replacing the repetitive reference pulses with multiple short pseudo-random reference pulse sequences. The receiver uses them to estimate the channel impulse response and based on this to form an improved template which removes the parts mainly consist of noise and gives the multipath components that have better signal-to-noise ratio higher weights. The proposed system is described and its performance in a multipath channel is analyzed and simulated. The result shows that this scheme can effectively suppress a template’s noise level and the proposed system has a better bit-error-ratio performance than that of a conventional averaged TR system.


Noise suppression, Pseudo-random (PN) sequence, Transmitted reference (TR), Ultra-wideband (UWB) communications, Wireless sensor network (WSN)