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This paper presents a mixed-signal baseband processing chain, which is suitable for a MB-OFDM UWB receiver. The convolutional decoder structure is based on a (2,1,7) convolutional code used in several UWB physical layer proposals. An analog processing core can be viewed as an alternative approach to the digital cores, which need advanced signal processing techniques to avoid the speed bottlenecks,...
A differential architecture of an analog Viterbi decoder is presented. Analog processing enables the analog-digital converter to be excluded from the decoder realization. Moreover, high-speed operation can be achieved via differential processing. We describe the differential operation, together with the resulting decoder structure. The differential architecture enables the trace-back memory to be...
A mixed-mode parallel processor is presented in which the processing units can be coupled with first-, second-and third-order polynomial feedback terms of the state of a processing unit. It combines analog and digital processing so that the realization of couplings and the polynomial terms are implemented with analog blocks whereas integration of cell state is digital and A/D- and D/A converters are...
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