Transmit diversity for combined 2G and 3G CDMA systems |
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| Authors: | Buehrer R.M. Soni R.A. Benning R.D. |
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| Affiliation: | Mobile & Portable Radio Res. Group, State Univ., Blackburg, VA, USA; |
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| Abstract: | In this letter, we propose modifications to existing transmit-diversity techniques to provide transmit diversity in code-division multiple-access cellular systems which must support both second-generation and third-generation mobiles on a common carrier. The proposed method, which we call symmetric-sweep transmit diversity, combines phase-sweep transmit diversity (PSTD) and space-time spreading (STS) in a way that allows second-generation and non-STS-capable mobiles to obtain the full advantage of PSTD, while third-generation mobiles obtain the full advantage of STS. |
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