A Log-Likelihood Ratio Nonuniform Quantization Scheme for Cooperative Spectrum Sensing

Data fusion has been a key technology of cooperative spectrum sensing in cognitive radio. To solve network collaborative information compression distortion under limited bandwidth, we proposed a nonuniform quantization scheme for each sensing nodes. Simulation results show that the proposed scheme could improve detection probability compared to conventional uniform quantization. And the fusion performance without distortion could be achieved with proposed quantizer by only 3 bits quantization.