An Adaptive Parallel Combined Spread Spectrum Scattering Communication System
Combined with parallel combined spread spectrum technology,this article proposes an adaptive parallel combined spread spectrum scattering communication system by selecting parallel spread parameters and system methods suitable for scattering transmission.Two transmission modes of high rate and reliability are adaptively switched according to different scattering SNR envi-ronments.In the high-rate mode,the PCSS demodulation soft judgment method with sequence polarity is adopted to improve the ac-curacy of demodulation and amplification and match the high transmission rate requirements.In reliability mode,the system is more reliable by reducing the number of spread spectrum values and low-order modulation.Compared with the direct spread spectrum sys-tem,the data transmission rate is improved.It has lower bit error rate compared with unimproved common parallel extension system.
parallel combined spread spectrumscattering communicationdata transfer ratemodeling of communication system
万方数据
维普
