FBPSK, power and spectrally efficient modulation for PCS andsatellite broadcasting applications

摘要

FBPSK, a new modulation technique which leads to nonlinear amplified power efficient BPSK modulated systems is presented. This technique has an offset quadrature modulator structure, and uses a nonlinear FQPSK processor to smooth the pulse shape of the transmitted data. FBPSK can be nonlinearly amplified using C class type of amplifiers with minimum spectral regeneration leading to power and spectrally efficient systems compared to conventional BPSK in both satellite and PCS applications. It can deliver 1 Watt output power compared to 150 mWatt for BPSK, and reduces spectral regeneration by a minimum of 18 dB in wireless LAN applications. FBPSK is compatible with BPSK, and can be demodulated using conventional BPSK receivers. The BER performance of FBPSK in AWGN channels has a less than 1.1 dB degradation compared to a BER of 10-4 for BPSK. FBPSK increases the power output and spectral efficiency, extends the battery life, and reduces the radiation compared to BPSK modulated systems