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Transform-domain (TD) receivers expand the received signal over a basis set, and then operate on the basis coefficients. An analog computation of the basis coefficients efficiently parallelizes the signal for digital processing, relaxing the sampling requirements and enabling parallel digital processing at a much lower rate. Frequency-domain (FD) sampling, as a special case of TD sampling, has been proposed to parallelize the sampling process in broad-band communication receivers. The flexibility and scalability of TD receivers allow for the design of receivers that can cope with a large range of narrow-band and broad-band communications standards. A theoretical TD receiver design example is provided which is capable of processing GSM, Bluetooth, IEEE802.11g, Wimax, and UWB in just one configurable front-end. An example of spectrum sensing in cognitive radio is also provided.
Circuits and Systems II: Express Briefs, IEEE Transactions on (Volume:55 , Issue: 4 )
Date of Publication: April 2008