Recently, orthogonal frequency division multiplexing (ofdm) has been effectively used for transmitting high speed data in multi-path fading channel environments in ofdm, the high speed data stream is processed in parallel and transmitted by n (in general, a power of 2) orthogonal sub-carriers.
An adaptive channel tracking method for mimo- ofdm systems abstract the tracking of the time-varying channel is crucial for mimo-ofdm wireless communication systems aiming at doubly-selective fading mimo channels, we present a novel pilot pattern and the corresponding adaptive channel tracking algorithm. Request pdf on researchgate | multipath channel tracking in ofdm systems | high-quality channel estimation and tracking is central for coherent detection in wireless communication systems typical tracking algorithms assume the number of multipath components and delays to be known and constant, while their ampli- tudes may vary in time.
An apparatus and a method to track the channel response for subcarriers in an ofdm receiver for a packet of information that includes a known transmitted part the receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet the method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision.
In the presented paper, the principle of frequency domain channel estimation for wireless ofdm systems will be shown a well known noise reduction technique will be adapted to hiperlan/2 and ieee80211a standards, and its positive effects will be demonstrated by simulation results. Abstract—we propose a method for channel estimation in orthogonal frequency division multiplexing (ofdm) systems unlike the conventional sample-spaced and sub-sample-spaced methods, which target the taps of an equiv-alent discrete-delay channel response, this method tar-gets the physical propagation paths in a continuous-delay domain.