In this paper channel estimation techniques for a mobile fourth generation coherent orthogonal frequency division multiplexing (OFDM) system are proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the channel is generated for each OFDM symbol. This is achieved by inserting pilot symbols amongst the data symbols in the OFDM modulation grid. With suitable interpolation, the channel estimate at all intermediate symbols can be generated. A number of channel estimation methods with different pilot patterns and interpolation methods are examined for a range of UTRA specified channel environments. Each environment is shown to have an optimal pilot scheme, power level, pattern and density and the paper proposes the use of adaptive pilot processing.
Name and Venue of Conference: IEEE 56th Vehicular Technology Conference, VTC Fall-2002)
Rose publication type: Conference contribution
Sponsorship: Alex Dowler acknowledges the financial
support of the Engineering and Physical Sciences Research Council (EPSRC) and Toshiba Research Europe Ltd. Angela
Doufexi acknowledges the support of the IST
SATURN and ROMANTIK projects.
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Contributor (Other): Institute of Electrical and Electronics Engineers (IEEE)
- channel estimation, OFDM, fourth generation
56th Vehicular Technology Conference 2002 (VTC 2002-Fall)
|Duration||1 Sep 2002 → …|