Coding for Wireless Channels (Information Technology: Transmission, Processing and Storage)
Coding for Wireless Channels (Information Technology: Transmission, Processing and Storage)
Impacts of Narrowband Interference on OFDM-UWB Receivers: Analysis and Mitigation
IEEE Transactions on Signal Processing
Channel models for ultrawideband personal area networks
IEEE Wireless Communications
Performance Analysis and Enhancement of Multiband OFDM for UWB Communications
IEEE Transactions on Wireless Communications
Bit-interleaved coded modulation
IEEE Transactions on Information Theory
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Impact of Ultra Wide Band emission on WiMAX systems at 2.5 and 3.5GHz
Computer Networks: The International Journal of Computer and Telecommunications Networking
Robust Lp-norm decoding for BICM-based secondary user systems
IEEE Transactions on Communications
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This paper presents an analysis of the performance of the Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) system for Ultra Wideband (UWB) communication in the presence of interference from IEEE 802.16 WiMAX systems operating in the 3.5 GHz band. We present an exact analysis of the uncoded bit error rate (BER) of the MB-OFDM system, based on Laplace transform techniques. We also present a simple Gaussian approximation for the WiMAX interference, and establish its relative accuracy and usefulness by means of comparison with the exact analysis and simulations. Such a Gaussian approximation is especially useful for simplified performance analysis, as well as for the design of interference mitigation techniques. Motivated by the Gaussian approximation, we propose a simple two-stage interference mitigation technique for coded MB-OFDM transmissions, consisting of interference spectrum estimation during silent periods followed by appropriate bit metric weighting during Viterbi decoding. We compare parametric and non-parametric spectrum estimation techniques for various scenarios of interest. In the presence of WiMAX interference, the two-stage interference mitigation provides substantial gains in performance in return for modest increases in complexity and without requiring any modifications to the MB-OFDM transmitter or signal structure.