中文摘要：

为了取得高达1Gbit／s的峰值数据速率，3GPPLTE版本10引入载波聚合技术来扩展系统带宽，使其高达100MHz。同时，认知无线电技术的发展也将促进各种新兴应用程序的发展，例如，公共安全、智能电网、宽带蜂窝网络等。因此，提出将载波聚合技术与认知无线电技术有效结合，利用载波聚合技术将使用认知无线电技术探测到的空闲频谱进行聚合，并将这两种技术协作得到的带宽资源按比例公平算法进行分配，通过仿真结果验证此项结合带来的带宽与传输速率的提高。毋庸置疑，此项创新将使未来无线通信发生革命性的变化。

英文摘要：

In order to achieve up to 1 Gbit/s peak data rate, 3GPP LTE Release 10 has introduced carrier aggregation （CA） to scale the system bandwidth up to 100 MHz as discussed elsewhere. Besides, the developments of cognitive radio （CR） will support various emerging applications. For example, public safety, smart grid, broadband cellular and so forth. So the effective combina- tion of the carrier aggregation technology and cognitive radio technology is presented. The carrier aggregation technology is used to aggregate the free spectrum detected by cognitive radio technology. Then allocate the bandwidths got by the two technologies based on the proportional fair algorithm and the increased bandwidths and transmission rates are shown through the simulation results. There is no doubt that the innovation will make revolutionary change in the future wireless communication,