CAJ | 학술논문

Turbo 均衡将 Turbo 码的迭代译码思想扩展到信道均衡领域，通过迭代的方式在信道均衡器和解码器之间进行数次软信息交互，从而能够达到比传统均衡处理更优的抗多径干扰性能。针对 Turbo 均衡在实际应用中的复杂度过高的问题，给出了一种基于近似线性 MMSE 的频域 Turbo 均衡算法。该算法通过快速傅里叶变换将基于 MMSE 准则信道均衡处理转换到频域进行，从而避免了复杂的矩阵求逆运算。仿真结果表明，相对于时域的近似线性 Turbo 均衡算法，该算法在时不变多径信道下能够以相对较低的复杂度实现更好的抗多径干扰性能。
Turbo 균형장 Turbo 마적질대역마사상확전도신도균형영역，통과질대적방식재신도균형기화해마기지간진행수차연신식교호，종이능구체도비전통균형처리경우적항다경간우성능。침대 Turbo 균형재실제응용중적복잡도과고적문제，급출료일충기우근사선성 MMSE 적빈역 Turbo 균형산법。해산법통과쾌속부리협변환장기우 MMSE 준칙신도균형처리전환도빈역진행，종이피면료복잡적구진구역운산。방진결과표명，상대우시역적근사선성 Turbo 균형산법，해산법재시불변다경신도하능구이상대교저적복잡도실현경호적항다경간우성능。
Turbo equalization extends the idea of iterative decoding in Turbo code to channel equalization,which can achieve bet?ter anti?multipath performance than traditional equalization process through iterative exchange of soft information between channel equal?izer and decoder. To overcome the high complexity of Turbo equalization in practice, a Turbo equalization algorithm based on approximate linear MMSE is introduced. This algorithm avoids highly complicated matrix inversion process by transforming channel equalization based on MMSE criterion to frequency domain using FFT.The results of simulation indicate that,as compared with linear Turbo equalization,this algorithm can achieve better anti?multipath performance with lower complexity in time?invariant multipath chan?nels.