Amplitude Modulation (QAM) orthogonal frequency division multiplexing (OFDM) baseband system and channel estimation which uses inverse discrete Hartley transform (IDHT) and discrete Hartley transform (DHT). As the calculation of DHT and IDHT involves real operations hence the computational

Software Defined Radio (SDR) SDR is a set of HW/SW technologies that should facilitate the use of system with reconfigurable architectures in the wireless networks. Interest? SDR is an efficient way and a cheap solution to solve the problem to develop multimode, multiband and multifunction devices that can be adapted, updated and improved through

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The use of multi-amplitude signaling schemes in wireless OFDM systems requires the tracking of the fading radio channel. This paper addresses channel estimation based on time-domain channel statistics. Using a general model for a slowly fading channel, we present the MMSE and LS estimators and a

In this paper, we investigate channel estimation and signal detection for UWB communications.

... this paper performs channel estimation, multiuser detection and decoding in an iterative manner. The estimation of the frequency selective, block-fading channel is initiated with the pilot symbols. In subsequent iterations, soft decisions of all the data symbols are used in an appropriate

In a receiver employing Turbo equalization for an unknown, time-varying, frequency-selective channel, the channel estimate can be improved for each iteration by using soft information fed back from the decoder. The reference signal to the channel estimator is then the expected value of each

In this paper, we present a framework for evaluating the bit error probability of Nd-branch diversity combining in the presence of non-ideal channel estimates. The estimator structure presented is based on the maximum-likelihood (ML) estimate and arises naturally as the sample mean of Np pilot

channel. We here consider different methods of exploiting this property to improve channel estimation and subsequent space-time equalization performance. Three methods have been studied, a maximum likelihood reduced rank channel estimation method and two different signal subspace projection methods which

Channel estimators for HF radio links