An introduction to PSTD for IS-95 and cdma2000

Of the feedforward transmitter diversity methods considered for 3rd generation PCS/cellular systems one such method is known as phase sweeping transmitter diversity (PSTD). Since PSTD does not require a modification of the mobile station receiver, an important feature of this method is compatibility with 2nd generation as well as 3rd generation mobile stations. Furthermore, this method of transmitter diversity does not require specification in a standard. This paper provides an introduction to PSTD as it applies to IS-95 and cdma2000; the form of the received PSTD signal at the mobile station; compatibility issues between 2G and 3G; and link performance for AWGN, Rayleigh, and Ricean channel models.