Interference exoloitation for cognitive radios

Hiroyuki Yomo, Kentaro Nishimori, Petar Popovski, Yasushi Takatori, Ramjee Prasad, Shuji Kubota

研究成果: Article査読

2 被引用数 (Scopus)


Cognitive radios (CRs) operating in a frequency band owned by a legacy wireless communication system (often called the primary system) can be made more efficient if interference from the primary system is exploited instead of being regarded as a major disturbance that limits the opportunity to reuse the primary frequency band, However, since the primary system is a legacy system with known transmission parameters, the interference from the primary system should not always be treated as Gaussian-like noise. For a time-division- duplexing-based primary system, we show two examples of interference exploitation: (1) exploitation in the medium access control (MAC) layer to achieve distributed medium access for collocated CR networks (exploitation in the time domain) and (2) exploitation in the physical (PHY) layer where the interference from/to the primary system is cancelled/mitigated by using an adaptive array antenna (exploitation in the spatial domain). We show that such exploitation of interference can help cognitive radios efficiently reuse the primary spectrum in space and time.

ジャーナルNTT Technical Review
出版ステータスPublished - 2007 10月 1

ASJC Scopus subject areas

  • コンピュータ サイエンスの応用
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学


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