Performance Analysis of Carrier Acquisition for High Altitude Platform Networks

In order to detect and receive the signal for high altitude platform in the near space in the high dynamic and high information-rate situation, it is necessary to design digital system to acquire and track the carrier, high dynamic and high information-rate situation, the most important aspect is the great influence of Doppler frequency shift and high information rate on the carrier acquisition and track. This paper implements carrier acquisition and track in high dynamic and high information-rate situation for high altitude platform networks by mean of the combination of Field Programmable Gate Array (FPGA) and frequency, phase lock loop. The author also provides a new algorithm using Differential Quadrature Phase Shift Keying (DQPSK) for carrier acquisition and track and proves the validity of the design and algorithm by mean of calculation.