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Title: Performance study of air interface for broadband wireless packet access
Keywords: CDMA, IFDMA, VSCRF-CDMA, Air Interface, UWB
Issue Date: 2-Jun-2008
Citation: PENG XIAOMING (2008-06-02). Performance study of air interface for broadband wireless packet access. ScholarBank@NUS Repository.
Abstract: Broadband wireless packet access with an all-IP architecture has emerged as the preferred platform to deliver higher data rates and provide diverse services. This poses great challenges to the existing air interface technologies. In this thesis, a concept of using block spread (BS) has been proposed to deal with multi-user interference for the new air interface. Specifically, block-spread code division multiple access (BS-CDMA) and two-layer spreading CDMA (TLS-CDMA) schemes have been proposed to combat multiple access interference (MAI), multipath interference (MPI) and other-cell interference (OCI) effectively for uplink multi-cell scenario. The analysis and simulation studies show the significant improvement over the conventional DS-CDMA system. Moreover, the proposed BS concept can also be viewed as providing an additional domain on top of the conventional interleaved frequency domain multiple access (IFDMA) domain for multi-user allocation. In particular, block spread IFDMA (BS-IFDMA) and Two-dimensional Code Spreading IFDMA (TCS-IFDMA) schemes have been proposed to deal with MAI and OCI more efficiently. With the analytical and simulation results showing the superiority over DoCoMob
Appears in Collections:Ph.D Theses (Open)

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