CAJ | 학술논문

Polar码是2007年由ErdalArikan基于信道极化理论提出的一种新的信道编码方法。在理论上，它能够达到信道容量，并且有着较低复杂度的编译码算法。由于Polar码出现不久，其相关应用研究报道较少。OFDM（Orthogonal Frequency Division Multiplexing）即正交频分复用技术将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到每个子信道上进行传输。本文研究Pola鸸在OFDM系统中的应用，讨论在OFDM系统中Polar码的译码迭代次数、码长、码率以及系统输入信噪比（SignaltoNoiseRatio，SNR）等因素对信号传输的影响。通过性能仿真说明在一定条件下译码迭代次数增加，和码率减小，都能使Polar—OFDM系统的性能更好。
Polar마시2007년유ErdalArikan기우신도겁화이론제출적일충신적신도편마방법。재이론상，타능구체도신도용량，병차유착교저복잡도적편역마산법。유우Polar마출현불구，기상관응용연구보도교소。OFDM（Orthogonal Frequency Division Multiplexing）즉정교빈분복용기술장신도분성약간정교자신도，장고속수거신호전환성병행적저속자수거류，조제도매개자신도상진행전수。본문연구Pola이재OFDM계통중적응용，토론재OFDM계통중Polar마적역마질대차수、마장、마솔이급계통수입신조비（SignaltoNoiseRatio，SNR）등인소대신호전수적영향。통과성능방진설명재일정조건하역마질대차수증가，화마솔감소，도능사Polar—OFDM계통적성능경호。
Polar codes, first proposed by Arikan in 2007,is a new channel encoding method based on Channel polarization theory which can achieve the channel capacity with a low encoding and decoding complexity. Because the Polar code is newly proposed,there is no that much relevant application research or report. OFDM （Orthogonal Frequency Division Multiplexing） is divided into a number of orthogonal subchannels, the high- speed data signals into sub-parallel low-speed data streams, the modulation to be transmitted on each subchannel. In this paper ,We have studied the performance of Polar Code in OFDM system and diccussed the affection of the decoding iterations times ,code length,bit rate and the system input SNR of Polar Code to OFDM. The results of numerical simulation show that along with the increase of decoding iterations times ,code length and the decrease of bit rate,the BER of the system decreases and.