摘要
It is a challenging problem to design a high performance modulation for mobile satellite communications due to the limited power and bandwidth resource.The paper improves Feher patented Quadrature Phase Shift Keying(FQPSK) by redefining the waveform.The novel FQPSK,with con-stant envelope,can be used to improve the power efficiency and frequency efficiency of mobile satellite communication.The study shows that the improved FQPSK outperforms conventional FQPSK over AWGN and is immune to the non-linearity of high power amplifier.At last,the impact of flat fading and multi-path fading of channel on the BER performance of improved modulation is analyzed.
It is a challenging problem to design a high performance modulation for mobile satellite communications due to the limited power and bandwidth resource. The paper improves Feher patented Quadrature Phase Shift Keying （FQPSK） by redefining the waveform. The novel FQPSK, with constant envelope, can be used to improve the power efficiency and frequency efficiency of mobile satellite communication. The study shows that the improved FQPSK outperforms conventional FQPSK over AWGN and is immune to the non-linearity of high power amplifier. At last, the impact of fiat fading and multi-path fading of channel on the BER performance of improved modulation is anlyzed.
基金
Supported by the National Natural Science Foundation of China (No. 60972061,60972062,and 61032004)
the National High Technology Research and Development Program of China ("863" Program) (No. 2008AA12A204)
the Natural Science Foundation of Jiangsu Province (No.BK2009060)
the "Triple Three" High Level Talent Development Plan of Jiangsu Province
