Wideband Transceiver Architectures for TV Whitespace Applications

The opening of the TV bands to unlicensed use in the United States offers an opportunity to build very wideband systems, capable of dynamic spectrum access (DSA), high datarates, high capacity, and long range links. To take maximum advantage of the wide bandwidths available (up to 90 MHz of contiguous spectrum), novel wideband transceiver architectures are needed. This paper presents wideband transceiver architectures we have developed to operate in US UHF band, discussion of the requirements placed on this transceiver by regulations in the FCC order (spectrum sensing, adjacent channel mask, etc), and presentation of an architecture we implemented whose performance meets the FCC requirements.