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.
出处
《通信学报》
EI
CSCD
北大核心
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~~
