盲速率判决技术在OFDM系统中的应用

该文借助CDMA系统中的盲速率判决技术解决交织与相位旋转(IPR-OFDM)( IPR:Interleaving and Phase Rotation)，系统中接收端恢复交织序号，对接收信号进行检测的问题。IPR-OFDM系统在发送端使用了V 个交织器，接收端为了恢复数据需要知道发送端使用的交织器序号进行解交织。一种解决方法是发送辅助信息(SI:Side Information)，这需要占用信道容量；该文借助于CDMA系统中速率判决的思想提出一种在接收端进行盲判的方法，它通过检测CRC(循环冗余校验码)和反转误码率(SER)信息等来获得所需要的交织序号，这种方法相对于前者提高了信道利用率。

Blind Rate Detection Applied in the IPR-OFDM System

This paper presents a blind detection method for the IPR-OFDM (Interleaving and Phase Rotation- Orthogonal Frequency Division Multiplexing) system. The proposed method is used to recover the interleaving order and detect the received data in the receiver. How to recover the original information in the receiver is the main motivation in this paper. In the IPR-OFDM system, it uses V interleavers to produce V permutations of the input data frame. To recovery the data, the receiver must know the interleaving order in the transmitter. In IPR-OFDM system, the Side Information(SI) is used to get it. But in this letter, a blind rate detection approach for CDMA systems can be modified and applied to the receiver structure. The interleaving order is obtained by the CRC (Cyclic Redundancy Check) and reverse SER information mainly. The blind detection can increase the channel capacity compared to that of SI method.