连续时变信道对协作通信性能影响的研究

Research on the Impact of Continuous Time-Varying Channel on Cooperative Communication

摘要:

协作通信能够抵抗无线信道衰落,是提高无线通信系统性能的有效手段。但是,其性能优势的发挥受信道时变的影响。文章研究了连续时变信道下协作通信系统的性能,为了准确反映信道连续时变情况,采用内插滤波高斯噪声法构建连续时变信道模型,选取误包率作为性能指标。仿真结果表明,连续时变信道下,随数据传输逐渐加重程度的过时信道状态信息将导致协作通信误包率性能大幅恶化。

Abstract:

Cooperative communication is one of the effective approaches to improve the performance of wireless communi.cation since it can combat the fading of wireless channel. The implementation of its performance advantage is affected bythe time-varying characteristic of wireless channel. In this paper, the performance of cooperative communication undercontinuous time-varying channel was studied. To accurately reflect the situation that channel was continuous time-vary.ing, the interpolated filtered Gaussian noise approach was used to model the continuous time-varying channel and thepacket error rate (PER) was chosen as the performance indicator. Simulation results showed that the outdated channel stateinformation (CSI) whose degree was aggravated with data transmission would lead to large performance deterioration.