【摘要】 从信号分析和信息处理的观点论述了Shannon限所包含的实际物理意义,指出了时频不确定性对信号在信道传输中的限制,将信源和信宿、收端和发端、编码与解码接合起来,分析了LDPC码的主要性能。更多还原

【Abstract】 From viewpoints of signal and information,we discuss and explain the actually physical meaning comprehended in Shannon limit,and point out what is the limitation of signal transmission in communication channels constrained by frequency-temporal instability,then combining information source with convergence, transmitters with receptors and coding with decoding,we also address main properties of LDPC.更多还原