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A novel signal structure is designed for a high data rate (HDR) Prerake UWB system, which uses orthogonal codes and chip-interleaving to suppress the inter-chip interference (ICI). On one hand, high data rate is achieved via superposition of symbols. On the other hand, the symbols are coded using the Walsh-Hadamard codes and interleaved on the chip level, which largely eliminates the ICI. The BER...
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