盲速率判決技術(shù)在OFDM系統(tǒng)中的應(yīng)用
Blind Rate Detection Applied in the IPR-OFDM System
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摘要: 該文借助CDMA系統(tǒng)中的盲速率判決技術(shù)解決交織與相位旋轉(zhuǎn)(IPR-OFDM)( IPR：Interleaving and Phase Rotation)，系統(tǒng)中接收端恢復(fù)交織序號，對接收信號進(jìn)行檢測的問題。IPR-OFDM系統(tǒng)在發(fā)送端使用了V 個交織器，接收端為了恢復(fù)數(shù)據(jù)需要知道發(fā)送端使用的交織器序號進(jìn)行解交織。一種解決方法是發(fā)送輔助信息(SI：Side Information)，這需要占用信道容量；該文借助于CDMA系統(tǒng)中速率判決的思想提出一種在接收端進(jìn)行盲判的方法，它通過檢測CRC(循環(huán)冗余校驗碼)和反轉(zhuǎn)誤碼率(SER)信息等來獲得所需要的交織序號，這種方法相對于前者提高了信道利用率。
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關(guān)鍵詞:
- 正交頻分復(fù)用; 峰均比; 交織與相位旋轉(zhuǎn); 速率判決
Abstract: 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 interleavers to produce 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. -
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