Communication can be an integral part of human being activities. It's the interaction between two or more people. According to Oxford dictionary, communication is thought as "the activity or procedure for expressing ideas and thoughts or of presenting people information". In other words, it consists of the showing ideas and information between one person and other people.
Communication has various forms. Even though many people think of its varieties mostly as speaking and hearing, communication is a more complicated process. Tooley and Dingle (2007) provide a clearer classification. Corresponding to them, there are four main types that people used today, mainly: written, graphical, verbal and non-verbal. Each kind can also be subdivided into smaller parts. For example, written may contain literature, notes, letters. . .
Keywords: time dispersion definition, what's time dispersion
When a signal is transmitted, this sign can undergo a distortion induced by reflections and spread propagation paths in the radio route, and these phenomenons cause that an identical signal finds differing times at its vacation spot. These differing times are credited that to the signal gets there via multiple pathways and in different incident angles. Enough time difference between the arrival moment in time of the first multipath part and the last one is called delay spread.
In order to compare different multipath channels also to develop some basic design rules for cordless systems, some guidelines are used to quantify the multipath route. Some of these multipath parameters are the mean excess delay, rms delay pass on, and maximum unnecessary wait, and can be motivated from a electricity delay profile.