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.
关键词
并行组合扩频/散射/数据传输速率/通信系统建模
Key words
parallel combined spread spectrum/scattering communication/data transfer rate/modeling of communication system
维普
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