| 摘要 |
The processing of information signals is described in an Ultra Wideband (UWB) transceiver. The transceiver has both transmission and receiver paths for processing information signals. In the receiver path, broadcast RF signals are converted to a zero intermediate frequency (IF) signal using a reference signal from a phase-locked loop (PLL) that can selectively provide a reference signal corresponding to the center frequencies of a plurality of signal band groups. The IF signal is then selectively modulated into the baseband signal to be digitized for presentation. In the transmission path, the in-coming digital signals are converted to analog baseband signals and selectively modulated into their own zero IF signals. Using the same PLL of the receiver path, the zero IF signals are modulated into the transmission RF signals directed to the target signal band of the target signal band group.
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