CAJ | 학술논문

阐述了一种基于脉冲无线电超宽带（Impulse radio ultra‐wideband ，IR‐UWB）系统的高速低密度奇偶校验码（Low density parity‐check codes ，LDPC ）算法推导及其性能比较，分析了渐进添边算法（Progressive edge‐grow th ，PEG）结合分块准循环（Quasi‐cyclic ，QC）的方式实现校验矩阵的构造以及单位阵（ I矩阵）和Q矩阵作为子循环矩阵时的性能，并通过M atlab仿真的误比特曲线对算法进行分析。该LDPC解码器的设计采用一种基于变量因子的最小和（Minimum sum ，MS）译码算法，硬件复杂度较低，在标准U WB衰弱信道中，误码率10－6下产生约3．2 dB信噪损失。
천술료일충기우맥충무선전초관대（Impulse radio ultra‐wideband ，IR‐UWB）계통적고속저밀도기우교험마（Low density parity‐check codes ，LDPC ）산법추도급기성능비교，분석료점진첨변산법（Progressive edge‐grow th ，PEG）결합분괴준순배（Quasi‐cyclic ，QC）적방식실현교험구진적구조이급단위진（ I구진）화Q구진작위자순배구진시적성능，병통과M atlab방진적오비특곡선대산법진행분석。해LDPC해마기적설계채용일충기우변량인자적최소화（Minimum sum ，MS）역마산법，경건복잡도교저，재표준U WB쇠약신도중，오마솔10－6하산생약3．2 dB신조손실。
The derivation and the performance analysis of a kind of high‐rate low density parity check (LDPC )codes algorithm are proposed for the application of impulse radio ultra‐wideband (IR‐UWB ) communication system .The PEG algorithm is combined with block quasi‐cyclic manner to construct the parity check matrix and the two different algorithms performance are compared by using the matrix I and matrix Q as the sub‐block cyclic matrix .The performance analysis is conducted with bit‐error curve from Matlab simulation .Moreover ,the minimum sum (MS) decoding algorithm based on a variable factor of the design is proposed and the final low complexity low density parity‐check code (LDPC) decoder incurs only about 3 .2dB signal‐to‐noise ratio (SNR) loss with the error rate of 10-6 bit in standard UWB fading channels .