网络卷积协同通信新系统及性能

提出一种新的协同通信系统——网络卷积协同通信系统。新方案借鉴网络编码的思想，对协同用户自身要传输的数据和需要转发的同伴数据进行相关卷积编码，这样整个协同通信方案可等效为一个卷积编码器，在获得分集增益的同时可获得编码增益，提高系统的误码性能。在假设协同用户间信道理想的情况下，理论推导出系统误码率性能的上界。理论分析和仿真结果表明，网络卷积协同通信系统在协同用户间信道理想时，在误比特率为10^-3时，较编码协同通信和无协同通信系统分别大约有8～9 dB和11～13 dB的增益。

Studies on Performance of a Network Convolutional Cooperative Communication System

A new identity-based partially blind signature scheme was proposed. Assuming the intractability of the q-Strong Diffie-Hellman problem, the scheme was proved to be unforgeable in the random oracle model. Compared with other existing schemes, the new scheme performs more efficient in computation because it doesn’t need inefficient MapToPoint hash function and only needs one pairing computation. Based on the scheme mentioned above, a restrictive partially blind signature is proposed and proved to be efficient, correct, unforgeable, as well as restrictive and partially blind.