First, some concepts need to be clarified: 1. Code element rate: The code element rate refers to the number of signal elements transmitted per second. The unit is baud (baudit, b), represented by the symbol rb. Digital signals can be binary codes, but the symbol rate is different from the signal. Rb, that is, r&b, also known as rnb, its full form is rhythm and blues, translated as rhythm and blues or rhythm and blues. A fusion of jazz, gospel and blues music. This musical term is coined by the American magazine Billboard.
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