Baseband

• Baseband refers to systems and signals with a frequency range that starts close to zero hertz. Hertz is a unit of frequency defined in cycles per second. In telecommunications, parts of signals that occur at low frequencies are often copied to higher frequency ranges for the purpose of transmission. The high frequency copied version is called the radio frequency signal. The low, original signals are baseband signals.
  
  

Analog Baseband Chip

• The ABB, or analog baseband chip, is a microchip in use in 3G (third generation) mobile communication technology. Analog baseband chips use analog-to-digital and digital-to-analog converters to convert digital format to and from the radio frequency chip. ABB chips are used to manage long talk and standby times and control power consumption.
  
  

UMTS Baseband Chip

• The UMTS, or Universal Mobile Telecommunications System, baseband chip is used to manage 3G operations via its RF chip. UMTS refers to air interface standards used for 3G technology. Air interface refers to the radio communication link between an active cellular network base station and a mobile station, or the user equipment needed for communication with a mobile network.