Distributed spectrum sensing

摘要

The present invention relates to a spectrum sensing scheme for a radio network. The proposed approach involves applying sensing in a distributed fashion to obtain an estimate of the signal spectrum. A network of the multiple sensing nodes (200-1 to 200-J) obtains such a spectrum estimate without requiring high-speed analog-to-digital converter to accommodate the large band-width of interest.

主权项

1. An apparatus for sensing a spectrum for a radio network, said apparatus comprising:
a correlator comprising:
at least one branch having a multiplier performing a partial autocorrelation of a received signal, each of said at least one branch performing said partial autocorrelation at a corresponding specific delay, wherein said partial autocorrelation is performed by multiplying said received signal with its conjugated version delayed by said corresponding specific delay;transforming each of said autocorrelation associated with said at least one specific delay to a partial compressive measurement sequence, said transforming comprising:
integrating each of said partial autocorrelation over a predetermined time window, anddigitizing each of said integrated partial autocorrelation, wherein said digitization being at a rate based on a bandwidth of said received signal and said predetermined time; and a forwarder forwarding said partial compressive measurement sequence for collection at a fusion center.