大气噪声条件下海上短波通信可通性研究

Research on the Feasibility of Shortwave Communication at Sea under the Condition of Atmosphere Yawp

大气噪声是影响海上短波通信质量的主要因素,研究海上短波通信可通性必须考虑大气噪声影响。介绍短波通信的特点,分析了地波、天波传播的影响因素,归纳出接收场强的计算公式。引入信噪比概念,对大气噪声场强典型值进行计算,设计了一种完整而简洁的海上短波通信接收点信噪比计算流程。可快速、准确的确定可通频段,对提高海上短波通信效率有重要意义。

The atmosphere yawp is a main factor affecting the quality of shortwave communication at sea. The influence of atmosphere yawp must be considered while researching the feasibility of shortwave communication. The paper introduces the characteristic of short communication, and analyses the factors influencing terra wave and skywave. The calculation formula of received signal intensity is concluded. SNR notion is introduced, and representative value of atmosphere yawp intensity is calculated. At last, a complete and concise procedure for calculating SNR of the shortwave communication at sea is proposed. Calculation methods and simulation procedure can ascertain feasible frequency scope, and have significant meaning for improving shortwave communication efficiency.