【摘要】：針對正交頻分復(fù)用系統(tǒng)的高峰均功率比問題,在傳統(tǒng)子塊交織和部分傳輸序列(partial transmit sequence,PTS)算法的改進基礎(chǔ)上提出了聯(lián)合SI-PTS算法。算法中提出了1個新的子塊交織方案,其中的每個子塊相互交織。另外,還提出了1個新的相位因子優(yōu)化方案,方案中的相位因子只有兩相序列,迭代次數(shù)等于子數(shù)據(jù)塊的數(shù)目,極大地降低了計算復(fù)雜度。所提算法基于傳統(tǒng)PTS算法,利用新的優(yōu)化方案優(yōu)化部分傳輸序列,并結(jié)合新的子塊交織技術(shù),打亂原正交頻分復(fù)用(orthogonal frequency division multiplexing,OFDM)信號序列,以降低其相關(guān)性,并進而降低OFDM系統(tǒng)的PAPR值。仿真結(jié)果表明,SI-PTS算法與傳統(tǒng)PTS、SLM算法相比,能有效地改善OFDM系統(tǒng)的PAPR性能,并在保持系統(tǒng)誤碼率性能的前提下,有效地降低計算復(fù)雜度;SI-PTS算法對PAPR的抑制能力隨著子載波數(shù)目的增加而下降,隨著分組數(shù)的增加而提高。
[Abstract]:In order to solve the problem of peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (ODM) systems, a joint SI-PTS algorithm is proposed based on the improvement of the traditional subblock interleaving and partial transmission sequence (partial transmit sequence,PTS) algorithm. In the algorithm, a new subblock interleaving scheme is proposed, in which each subblock interweaves with each other. In addition, a new phase factor optimization scheme is proposed, in which the phase factor is only two-phase sequence, and the number of iterations is equal to the number of sub-data blocks, which greatly reduces the computational complexity. Based on the traditional PTS algorithm, the proposed algorithm uses a new optimization scheme to optimize the partial transmission sequence, and combines the new subblock interleaving technology to disrupt the original orthogonal frequency division multiplex (orthogonal frequency division multiplexing,OFDM) signal sequence in order to reduce its correlation and then reduce the PAPR value of OFDM system. The simulation results show that compared with the traditional PTS,SLM algorithm, SI-PTS algorithm can effectively improve the PAPR performance of OFDM system and effectively reduce the computational complexity while maintaining the BER performance of the system, and the suppression ability of SI-PTS algorithm to PAPR decreases with the increase of the number of subcarriers and increases with the increase of block number.
【作者單位】： 太原理工大學(xué)信息工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(61271249)
【分類號】：TN929.53

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