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无线专网通信技术是中低压通信接入网络中的重要组成部分,但频谱资源的有限性是制约电力无线专网技术发展的重要因素。目前电力专用230MHz频谱只能支持很低的传输速率和频谱效率,为了提高频谱效率,承载更高传输速率的业务,文中提出了在该频段上使用载波聚合技术。结合230MHz频段特点,设计出载波聚合的数字电路。为验证载波聚合的实现效果,对230MHz频谱上使用载波聚合后的传输速率进行估算,并在新型电力无线宽带系统中进行实验验证。计算和实验结果都表明:通过载波聚合技术,该频段的频谱效率有显著提高。
Wireless private network communication technology is an important part of the access network for medium and low voltage communications. However, the limited spectrum resources are an important factor restricting the development of power wireless private network technology. Currently, the power-dedicated 230 MHz spectrum can only support very low transmission rates and spectrum efficiencies. In order to improve the spectral efficiency and carry higher transmission rate services, a carrier aggregation technology is proposed in this band. Combined with the characteristics of 230MHz band, designed carrier aggregation digital circuit. In order to verify the effect of carrier aggregation, the carrier transmission rate after carrier aggregation in 230MHz spectrum is estimated and verified in a novel power wireless broadband system. The calculation and experimental results show that the spectral efficiency of this band is significantly improved by carrier aggregation.