Effective Capacity and Interference Analysis in Multiband Dynamic Spectrum Sensing

• 作者: Lian Zhao Mohamed Elalem
• 来源期刊: 通讯与网络(英文)
• 学科: 工学
• 关键词: EFFECTIVE Capacity COGNITIVE RADIO MULTIBAND SENSING INTERFERENCE
• 年，卷（期）: 2013,（2）
• 页码范围: 111-118
• 页数: 8页
• 分类号: TN92

摘要

In this paper, the performance of multichannel transmission in cognitive radio is studied. Both QoS constraints and interference limitations are considered. The activities of the primary users (PU)s are initially detected by cognitive users (CU)s who perform sensing process over multiple channels. They transmit in a single channel at variable power and rates depending on the channel sensing decisions and the fading environment. The cognitive operation is modeled as a state transition model in which all possible scenarios are studied. The QoS constraint of the cognitive users is investigated through statistical analysis. Analytical form for the effective capacity of the cognitive radio channel is found. Optimal power allocation and optimal channel selection criterion are obtained. Impact of several parameters on the transmission performance, as channel sensing parameters, number of available channels, fading and other, are identified through numerical example.