Jinsuk Pak
ABSTRACT
Cognitive radio (CR) has been getting attention as a remarkable technology to improve spectrum efficiency by utilizing unused spectrum resources. Especially, many countries have been considering permission for CR-based spectrum usage of TV white space (TVWS). Even though TV band has favorable propagation property compared to other higher frequency bands, CR system in TVWS involves a fundamental limit on system capacity because of a restricted TV channel bandwidth. To overcome it, in this paper, we introduce new CR test-bed with capability of carrier aggregation. By utilizing carrier aggregation functionality, we can effectively utilize multiple TV channels and achieve higher system capacity. Moreover, the test-bed supports non-contiguous carrier aggregation as well as contiguous carrier aggregation. Because unused TV channels are spread over entire TV band sporadically in general, new test-bed provides noticeable performance improvement compared to the existing CR systems in TVWS. Detailed implementation of the test-bed including each functional module is explained, and functional test procedures with corresponding results are provided for evaluation.
- U.S. FCC, "Second report and order and memorandum opinion and order," in FCC 8--260, Nov. 2008.Google Scholar
- Ofcom, "Digital dividend: cognitive access statement on license-exempting cognitive devices using interleaved spectrum," Statement, July, 2009Google Scholar
- Yonghong Zeng et al., "Worldwide Regulatory and Standardization Activities on Cognitive Radio," in proc. of the 2010 IEEE Symposium on New Frontiers in Dynamic Spectrum, pp. 1--9, Apr. 2010.Google Scholar
- Information exchange between systems - wireless regional area networks (WRAN) - specific requirements part 22: cognitive wireless RAN medium access control (MAC) and physical layer (PHY) specifications: policies and procedures for operation in the TV bands, IEEE 802.22--2011, July, 2011Google Scholar
- MAC and PHY for Operation in TV White Space, ECMA-392, Dec. 2009Google Scholar
- Antony Franklin et al., "Cognitive Radio test-bed based on ECMA-392 International Standard," 7th International Symposium on Wireless Communication Systems, pp.1026,1030, Sep. 2010Google Scholar
- Hou-Shin Chen and Wen Gao, "Cyclo-stationarity Based Sensing Algorithms," IEEE 802.22 contrib., Doc #: IEEE 802.22-07/0133r0, Mar. 2007.Google Scholar
- IETF PAWS "Protocol to Access Spectrum Database" Available: http://tools.ietf.org/wg/paws/draft-ietf-paws-protocol/Google Scholar
Index Terms
- Advanced cognitive radio test-bed with carrier aggregation in TV white space
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