CAJ | 학술논문

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.
위료충분이용신도적전수능력병만족불동용호화불동접수설비적요구,제출료일충다급전수적방안.해방안사용다급편마화다분변솔조제기술파엄파수거분성다개우선급,위불동우선급적수거제공불동적차착보호.해마시채용다급역마적방법,사득용호가이근거자신적신도질량혹자접수설비적능력,획득불동적수거전수솔.방진결과표명,해방안재AWGN화다경신도하도구유흔호적성능.
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.