A study on co-channel interference reduction manipulating PRF in asynchronous UWB-MBOK systems

Muto, Kohei; Kohno, Ryuji

doi:10.1109/uwbst.2004.1320990

Cited by 2 publications

(2 citation statements)

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“…The 802.15.3a Saleh-Valenzuela (S-V) UWB channel models are generally used to evaluate the UWB system performance [3,4]. The model is featured of clustering multipath phenomenon as observed in several channel measurements.…”

Section: The Ds-uwb Transmission Signal Modelmentioning

confidence: 99%

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Near Optimum and Highly Efficient Decision-Feedback Receivers for Direct Sequence Ultra-Wideband Radio

Hwang

Chiu

Chung

2007

Wireless Pers Commun

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This paper investigates three decisionfeedback receivers for Direct-Sequence Ultra-Wideband Radio (DS-UWB) based on two-channel BPSK modulation with ternary spreading code. A compact and insightful vector-matrix signal model is built up for receiver design under UWB channel dispersion over many consecutive symbols. First, we consider the design of a RAKE with Decision Feedback (RAKE-DF) receiver. Using the Gaussian approximation technique, we derive its analytic performance under no error propagation. It is shown that the RAKE-DF receiver suffers from a significant error floor due to the uncancelled pre-cursor ISI (or pre-ISI abbreviated). Next, we design the MMSE-DF receiver to achieve a better performance by suppressing the pre-ISI, too. However, the MMSE receiver requires costly matrix inversion. Then a new receiver is investigated as the third one, which is called the RAKE with Bi-Directional Decision Feedback (RAKE-BDDF) receiver, for efficiently canceling both the post-(cursor) ISI and pre-ISI at symbol rate. It cannot only attain the matched filter bound approximately, but also maintain a similar complexity as that of the RAKE-DF receiver. Simulation and semi-analytic BER curves are included for performance comparison of the three receivers in the presence of the CM2 and CM4 UWB channels.

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Section: The Ds-uwb Transmission Signal Modelmentioning

confidence: 99%

“…Although the UWB technology appeared at the 60's, it was only in the past few years that the wireless communication industry spent a lot of research efforts on this emerging technology [1][2][3][4]. Formerly, the IEEE 802.15.3 Committee had endeavored to set up a UWBbased PHY standard.…”

Section: Introductionmentioning

confidence: 99%