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Here, two different cases are considered: one is that cognitive radio network is distributed; the other is centrally-controlled that cognitive radio network has a cognitive base station. In the first case, how to choose one fixed cognitive user and power control for each transmission antenna at the cognitive base station are considered to maximize the cognitive link\u2019s stable throughput. In the second case, a scheme to choose a group of cognitive users and a Zero-Forcing method to pre-white co-channel interference to the primary user, are also proposed in order to maximize cognitive base station\u2019s sum-rate. The algorithm can be employed to realize opportunistic spectrum transmission over the wireless fading channels.<\/p>","DOI":"10.4018\/jcini.2011040104","type":"journal-article","created":{"date-parts":[[2011,10,19]],"date-time":"2011-10-19T12:08:40Z","timestamp":1319026120000},"page":"58-79","source":"Crossref","is-referenced-by-count":0,"title":["Cognitive MIMO Radio"],"prefix":"10.4018","volume":"5","author":[{"given":"Mingming","family":"Li","sequence":"first","affiliation":[{"name":"Beijing University of Post and Telecommunication, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiaru","family":"Lin","sequence":"additional","affiliation":[{"name":"Beijing University of Post and Telecommunication, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fazhong","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Computing & Communication Engineering, GUCAS, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dongxu","family":"Wang","sequence":"additional","affiliation":[{"name":"China Unicom, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Guo","sequence":"additional","affiliation":[{"name":"Beijing University of Post and Telecommunication, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"jcini.2011040104-0","doi-asserted-by":"crossref","unstructured":"Bayesteh, A., & Khandani, A. 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