无线广播系统的多级传输方案  

Multilevel transmission scheme for wireless broadcasting system

作　　者：孙向涛[1] 龚克[2] 

机构地区：[1]清华大学电子工程系微波与数字通信技术国家重点实验室,北京100084 [2]天津大学电子信息工程学院,天津300072

出　　处：《通信学报》2009年第7期106-110,117,共6页Journal on Communications

基　　金：清华-高通联合研究计划基金资助项目~~

摘　　要：为了充分利用信道的传输能力并满足不同用户和不同接收设备的要求,提出了一种多级传输的方案。该方案使用多级编码和多分辨率调制技术把广播数据分成多个优先级,为不同优先级的数据提供不同的差错保护。解码时采用多级译码的方法,使得用户可以根据自身的信道质量或者接收设备的能力,获得不同的数据传输率。仿真结果表明,该方案在AWGN和多径信道下都具有很好的性能。A multilevel transmission scheme was developed to take full advantage of the transmission channel capacity and meet the requirements of different users and different types of receiving equipments. In this scheme, broadcasting datas were divided into different levels of error protection and transmission rate by using multilevel coding and multi-resolution modulation techniques. Multistage decoder was adopted, which allowed user to receive data at different rate according to its transmission channel quality or its receiver ability. Simulation results show this scheme has good performance over both AWGN channel and multipath channel.

关 键 词：多级编码调制 集分割 多级译码 不同的差错保护 低密度奇偶校验码 

分 类 号：TN919.72[电子电信—通信与信息系统]