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Implementing multi-carrier CDMA2000

Posted: 17 Oct 2008     Print Version  Bookmark and Share

Keywords:multi-carrier  CDMA2000  RF modulation 

The goal of this application note by Analog Devices is to determine the feasibility of implementing a multi-carrier CDMA2000 transceiver and what the major sub-system performances must be.

While there are many variations of the design, the key focus is on this architecture, which represents a flexible radio platform that can easily implement a wide variety of air standards including WCDMA, CDMA2000 and TD-SCDMA.

Some variations of this architecture include high or low IF sampling as well as direct conversion for receive. Although the latter is not feasible for multi-carriers today, it is acknowledged as the low cost, high performance solution of the near future. In the transmit path, direct RF modulation is feasible for most applications if some amount of in-phase and quadrature (IQ) balance is provided. Direct RF modulation represents the lowest cost transmit path. For applications requiring high performance without an IQ balance network, superheterodyne IF up-conversion is another excellent option.

View the PDF document for more information.

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