1 An Efficient Spectrum Sensing Scheme for Cognitive Radio Samuel Cheng, Vladimir Stankovi´ c, and Lina Stankovi´ c Abstract - The paper combines distributed source coding and compressive sampling for effi- cient spectrum estimation. Two or more cognitive radios sample the spectrum compressively and independently compress their observations using multiterminal source coding. A central hub col- lects compressed streams from these radios before performing joint multiterminal source decoding followed by iterative signal reconstruction. Simulation results are provided for two radios perform- ing practical multiterminal source coding with uniform scalar quantization and systematic turbo codes for Slepian-Wolf coding and error protection. S. Cheng is with the Dept. Electrical and Computer Engineering, University of Oklahoma, Tulsa, OK. Tel: +1 918 660-3234. Fax: +1 918 660-3238. Email: samuel.cheng@ou.edu. V. Stankovi´ c and L. Stankovi´ c are with the Dept. Electronic and Electrical Engineering, University of Strathclyde, Glasgow, UK. Tel: +44 141 548-2679. Fax: +44 141 552 4968. Email: vladimir.stankovic@eee.strath.ac.uk, lina.stankovic@eee.strath.ac.uk. EDICS:COM-CODE. February 16, 2009 DRAFT