| 摘要: |
| 基于频谱共享模型，应用拉格朗日极值定理和注水算法，得出在频谱共享中接收功率
受限的情况下对称信道感知和非对称信道感知下认知用户信道容量的关系式，并分析了主
用户个数对认知用户信道容量的影响。仿真结果表明在相同平均信噪比下，瑞利衰落信道的
信道容量最大，而信噪比越小差别越明显。 |
| 关键词: 认知无线电 频谱共享 信道容量 接收功率受限 干扰温度 |
| DOI： |
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| 基金项目: |
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| Research on channel capacity under received-power constraint condition |
| WU Shao-qin |
| () |
| Abstract: |
| Based on the spectrum sharing model and via the Lagrange maximum theory
and injection method, the cognitive user channel capacity of the sy
mmetric channel and asymmetric channel is calculated respectively under the cond
ition that the
received power is constrained. The influence of primary user number on the chan
nel capacity is analysed. The simulation results show that Rayleigh f
ading channel has the most largest capacity under the same average signal-to-noi
se ratio(SNR), while the
difference will be more obvious when the SNR is smaller. |
| Key words: cognitive radio spectrum sharing channel capacity received power constraint interference temperature |
