Preface
This is a graduate-level book on the time division duplex (TDD) mode of code division multiple access (CDMA) technology for mobile communications. Its purpose is to familiarize the reader with the specific technologies related to the TDD mode of CDMA communications. In the TDD mode, transmission and reception to and from a user are carried out in the same frequency band, with transmission/reception switching at specific time slots. The TDD mode, as opposed to the more widely known and used frequency division duplex mode, has been used in non-CDMA mobile communications systems such as DECT and PHS. It has now become an integral part of the wideband CDMA (WCDMA) standards.

The reader is assumed to have a general knowledge of cellular mobile communications. However, a compact introduction to the subject matter in each chapter is expected to assist the beginner engineer to comprehend the subject matter. A comprehensive list of conference and journal papers in the references has also been provided for the reader who wants to gain a deeper insight into the TDD-CDMA technology.