Abstract
The software radio concept is a topic of widespread interest in wireless cellular systems. Due to the high sampling ratio and quantization requirements, the analog-to-digital converter (ADC) is used as a key component of any software radio architecture. In this paper, we present an analytical tool for evaluating the quantization requirements within the ADC that is used in software radio architectures. For this purpose, we take advantage of the Gaussian behavior of the multiband/multiuser signal at the input of the wideband ADC and employ results on Gaussian signals and memoryless nonlinearities. This characterization is then used for the performance evaluation and optimization of different quantization characteristics.
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