Hybrid DS/FH SS receiver based on coded-spread spectrum

Jicheng Liu; Dingrong Shao; Shujian Li

doi:10.1117/12.480499

22 August 2002 Hybrid DS/FH SS receiver based on coded-spread spectrum

Jicheng Liu, Dingrong Shao, Shujian Li

Proceedings Volume 4911, Wireless and Mobile Communications II; (2002) https://doi.org/10.1117/12.480499
Event: Asia-Pacific Optical and Wireless Communications 2002, 2002, Shanghai, China

Abstract

A scenario and its experimental results of hybrid DS/FH SS (Spread Spectrum) receiver based code-spread-spectrum (CSS) is presented in the paper.CSS is an efficient spread spectrum technology.The transmission efficiency is improved when PN code rate isn¡¯t changed.It suits to the situations which are rigorous for the bandwidth.The hybrid DS/FH receiver presented by the paper uses TMS320C33 as the processor,and uses FPGA to implement correlator,digital down-convertor,PN code generator and matched filters.Frequency-synthesizer is implemented by DDSAD9854.Method which transmits pilot PN code captured by using serial/parallel technology to synchronize rapidly is brought forward.DPLL and SCAFCT(signed cross automatic frequency track) is used respectively to track code and carrier.The optimum noncoherent demodulation (Max SNR Output ) which utilizes orthogonality of PN code can be the same with high dynamic environment.Finally,the figures including PN code synchronization and frame synchronization and demodulation are demonstrated.We can conclude that performance of the receiver is approving.

Citation Download Citation

Jicheng Liu, Dingrong Shao, and Shujian Li "Hybrid DS/FH SS receiver based on coded-spread spectrum", Proc. SPIE 4911, Wireless and Mobile Communications II, (22 August 2002); https://doi.org/10.1117/12.480499

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