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Orthogonal frequency division multiplexing (OFDM) is an effective technique for combating radio channel multipath fading and for high-bit-rate transmission over wireless channels and it is extensively used in modern wireless local area network systems to support high performance bandwidth-efficient multimedia services. Easily applied channel estimation and simple channel equalization are important...
Due to the efficiency of mitigation multipath delay spread, orthogonal frequency division multiplexing is extensively used in the wireless local area network domain, such as the IEEE 802.11a standard defined by the IEEE 802.11 standardization group and the HIPERLAN/2 defined by the European Telecommunication Standards Institute Project on Broadband Radio Access Networks. Orthogonal frequency division...
As an effective technique for combating multipath fading and for high data rate transmission over wireless channels, orthogonal frequency division multiplexing (OFDM) is extensively used in wireless local area network (WLAN) systems to support high performance bandwidth-efficient multimedia services. The efficient implementation of several tasks at the receiver becomes crucial in OFDM-based high-speed...
Orthogonal Frequency Division Multiplexing has become a key element of todays wireless communication systems. However, its sensitivity to oscillator phase noise is responsible for common phase error (CPE) and inter-carrier interference (ICI) which greatly degrades the overall system performance. In this contribution, we address the problem of reducing the effects of phase noise in an OFDM system operating...
Effects of improved channel estimation are studied for a proposed IEEE 802.11n OFDM MIMO system. Three channel estimation methods are considered: maximum likelihood (ML), time-domain truncation (TDT) and model-based (MB). TDT and MB are particularly useful when the channel delay spread is short. For an MMSE receiver, MB shows a 1-2.5 dB improvement over ML on the packet error rate performance for...
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