Channel tracking in ofdm systems

channel tracking in ofdm systems Channel tracking in wireless ofdm systems heiko schmidt, volker kuhn,¨ and karl-dirkkammeyer university of bremen, fb-1, po box 33 04 40, d-28334bremen, germany.

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.

Channel tracking in ofdm systems

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.

  • Channel estimation in ofdm systems, rev 0 4 freescale semiconductor block-type pilot channel estimation under the assumption that the interferences are completely eliminated [1–3], you can derive: equation 3 this equation demonstrates that an ofdm system is equivalent to a transmission of data over a set of parallel channels.
  • In other words, each mimo channel vector of any index is assumed to be independent of the mimo channel vector of any other index moreover, we consider each block to contain training and information symbols such that channel tracking is not performed.

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.

channel tracking in ofdm systems Channel tracking in wireless ofdm systems heiko schmidt, volker kuhn,¨ and karl-dirkkammeyer university of bremen, fb-1, po box 33 04 40, d-28334bremen, germany.
Channel tracking in ofdm systems
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