Abstract
Increased satellite digital communication rates require larger channel bandwidths which require analog-digital converters(ADCs) with higher sampling rates in the receiver. The in-phase/quadrature(IQ)data have to be sampled separately for ultra-high sampling rates,which requires IQ-separated processing.A baseband structure developed here for IQ-separated processing uses redesigned pilot arrays,an adjusted processing order and modified algorithms that gives separate frequency error estimates and timing synchronization on IQ data.Simulations show that this structure is fast with a bit-error-rate only 2 dB higher than the traditional structure.
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