摘要
Pattern时延差(PDS:Pattern time Delay Shift)编码通信体制具有很好的抗多途干扰能力,但传输过程中仍存在一定的误码。为提高该体制的抗噪声能力,将网格编码调制(TCM:Trellis-Coded Modulation)技术与PDS体制结合使用,对信息进行网格编码调制和维特比软判决译码。实验结果证明,该方案抗噪声效果显著,可使PDS体制的抗噪声性能提高3 dB左右。
The system of PDS (Pattern time Delay Shift) coding communication can resist the multi-path interfere well, but it can not resist noise in the channel well. Integrating TCM (Trellis-Coded Modulation) code and PDS scheme can solve this problem by coding the source information with convolutional code and decoding the re- ceived sequence by soft-decision Viterbi algorithm. Experimental results show that the proposed scheme gets about 3 dB coding gain, has better performance over the original decoding scheme.
出处
《吉林大学学报(信息科学版)》
CAS
2011年第2期92-96,共5页
Journal of Jilin University(Information Science Edition)
基金
海洋公益性行业科研专项经费基金资助项目(201005001-05)
哈尔滨工程大学中央高校基本科研业务费专项基金资助项目(HEUCFZ1008)