Abstract :
Shannon´s channel capacity equation, a very important theory, defines the maximum transmission rate of communication systems. However, if we assume that signal bandwidth is larger than noise bandwidth, then the channel capacity is larger than Shannon´ limit, which can be proved. This paper presents that geometric feature filter is satisfied with this assumption, therefore, in the frame of information theory, the feasibility of high-efficiency modulation in ultra narrow band and the rationality of extension to Shannon´s limit can be explained.
Keywords :
channel capacity; filtering theory; Shannon channel capacity; geometric feature filter; high-efficiency modulation; maximum transmission rate; Bandwidth; Channel capacity; Communication systems; Equations; Filtering theory; Filters; Frequency; Information theory; Narrowband; Signal processing; Geometric Feature Filter; Information Theory; Noise Bandwidth; Shannon’s Channel Capacity; Signal Bandwidth; Ultra Narrow Band (UNB);
