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In cognitive radio (CR) networks, secondary users (SUs) detect and share a spectrum band assigned to a primary user (PU) to communicate with their respective secondary receivers. In order to increase the reliability of the detection performance, the SUs cooperatively sense the spectrum by reporting their local information to a fusion center (FC) after quantization. For an accurate information transferring, the use of the enormous number of quantization bits for reporting is preferred, however, it simultaneously degrades the throughput performance in the perspective of reporting-throughput tradeoff. To tackle this problem, in this paper, we focus on the throughput enhancement for the secondary networks while satisfying a target sensing performance. To this end, we derive the quantized local test statistics of energy detector and propose the quantization bit allocation strategy that maximizes the throughput performance …