CAJ | 학술논문

针对现有 OFDM系统单一调制方式下峰均功率比过高问题，提出采用自适应调制的 AFSA-PTS 算法。该算法基于子载波信道增益对子载波进行自适应比特分配，根据比特数确定各子载波的调制方式，实现自适应调制，并采用 AFSA 快速寻优到 PTS 算法中的最佳序列，从而在降低系统计算复杂度的同时，实现峰均功率比的有效降低。仿真结果表明，采用自适应调制 AFSA-PTS 算法在降低峰均比的同时可有效降低系统的计算复杂度，证明了其优越性。
침대현유 OFDM계통단일조제방식하봉균공솔비과고문제，제출채용자괄응조제적 AFSA-PTS 산법。해산법기우자재파신도증익대자재파진행자괄응비특분배，근거비특수학정각자재파적조제방식，실현자괄응조제，병채용 AFSA 쾌속심우도 PTS 산법중적최가서렬，종이재강저계통계산복잡도적동시，실현봉균공솔비적유효강저。방진결과표명，채용자괄응조제 AFSA-PTS 산법재강저봉균비적동시가유효강저계통적계산복잡도，증명료기우월성。
This paper proposed an adaptive modulating artificial fish school optimized PTS algorithm to solve the high PAPR of single modulation in existing OFDM system.Firstly,it allocated bits based on the channel gain of sub-channels,then chose modulation mode for each sub-channels based on allocated bits.Finally,it used AFSA to find the optimal phase factor of PTS quickly,reducing computational complexity as well as the peak-to-average power ratio.The simulation results show that using adaptive modulating artificial fish school optimized PTS algorithm can reduce PAPR as well as the peak-to-average power ratio, which verifies the advantage of the proposed method.