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A variance detection (VD)-based impulse radio ultra-wideband (IR-UWB) system has the potential of mitigating narrowband interference (NBI), even in multipath environments. However, as a highly nonlinear system, which involves fourth-order multiplications, comprehensive analysis and evaluations of its performances have not been seen so far. In this paper, we address the issues by developing a log-normal...
In this paper, a unified framework, denoted as generalized nonlinear detection (GND), is developed to encompass existing nonlinear detection technologies as well as further optimize the performance of nonlinear detection for noncoherent impulse radio (IR) ultra-wideband (UWB) receivers. Computer simulations show that independent of absence or presence of narrowband interferences (NBIs), the GND-based...
In this paper, the bit-error rate (BER) performance of the differential code-shifted reference (DCSR) transceiver for impulse radio ultra-wideband (IR UWB) systems is analyzed theoretically and validated through computer simulations. Furthermore, a thorough comparison between the DCSR transceiver and the existing transceiver architectures, namely, the transmitted reference, the frequency-shifted reference,...
In this paper, a differential code-shifted reference ultra-wideband (CSR UWB) transceiver has been proposed to reduce the power spent to transmit the reference pulse sequence so as to improve the bit-error rate performance of the systems. In the differential CSR UWB transceiver, by differentially encoding M information bits to be transmitted simultaneously, one data pulse sequence can be used as the...
In this paper, the performances of the selective Rake receiver and the transmitted reference (TR) receiver are evaluated through computer simulations, for impulse radio ultra-wideband (UWB) systems. The performances of these two receivers are compared by bit error rate (BER), system complexity, and implementation considerations, under IEEE802.15.4a industrial line-of-sight (LOS) and non-line-of-sight...
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