最後透過各個次系統的性能實驗驗證，整體通訊誤碼驗證，估測此無線電收發機系統理論性能，於誤碼率10^-4時可達-118dBm，接收EIRP為50dBm的地面站發射之訊號，UHF與VHF最大通訊距離分別為6913公里與19977公里。 ;In this paper, we focus on development of half-duplex dual band radio module for CubeSat, support 144-146MHz and 435-438MHz radio band. The system is designed and implemented from COTS, Commercial Off-The-Shelf, component, which specification follows the mainstream amateur packet radio protocol.
With research the specification requirements of communication system, we design the hardware of radio and base band system, including microcontroller, RF modulation chip, low noise amplifier and power amplifier. Then we analyze and calculate the theoretical performance of each subsystem and the whole system, which is for reference of subsequent verification.
In the end of paper, we verify the performance of subsystem and the overall transmission performance. Prove that the transceiver system can be achieved at BER of 〖10〗^(-4) with a signal strength 118dBm. In addition, the signal transmitted by the ground station with EIRP of 50dBm is received. The maximum communication distance of UHF and VHF are 6913 km and 19977 km respectively.
