It is recognized that multipath remains as a dominant source of ranging error in CDMA and Global Navigation Satellite Systems (GNSS) positioning. Given the limitations of the traditional multipath code delay estimation techniques, this work considers another class of code tracking algorithm wherein the GNSS receive endeavors to characterize the propagation channel by estimating the relative del...

In this paper, we have analysed the received signal without multipath at Additive White Gaussian Noise (AWGN) with a Signal to Noise Ratio (SNR) per sample, 10 dB, 8 dB, 6 dB and 4 dB respectively. We present the received signal with a multipath channel with noisy, the signal to noise ratio of 6 dB is studied and a multipath channel noiseless. And doing these studies, we considered the impulse ...

This research examines the performance of a spectrally encoded, multi-carrier, phase shift keying communications system in a frequency-selective, slowly-fading multipath channel. The specific communications system modeled is the transform domain communication system (TDCS) originally researched as an interference avoidance technique. Previous TDCS research assumed an additive white Gaussian noi...

The objective of this work is to enhance the knowledge about channel estimation and to compare the existing channel estimation techniques . Normally the received signal is corrupted by the channel i.e. Multipath, ISI. The estimation of a time-varying multipath fading channel is a difficult task for the receiver. In this work following estimation algorithms are studied viz. LMS, RLS, MMSE, LS, E...

The performance of a wireless signal propagation can be estimated with the properties or characteristics of the channel. This paper begins with the classification of the important characteristic of a channel i.e, fading. After that fast fading modeling for multipath with no direct path and multipath with direct path is analyzed in the fourth part of this paper. In the last section of this paper...

This study proposes an efficient channel-estimation scheme for Multiband (MB) Orthogonal Frequency Division Multiplexing (OFDM)-based Ultra Wide Band (UWB) communication systems. One of the challenges in wireless system is the frequency selective fading caused due to multipath channel between the transmitter and receiver. The signal bandwidth in broad band cellular wireless systems typically ex...

Adaptive blind equalization for multipath channels has gained widespread intention in wireless communication applications. Unfortunately, inherent distortion in multipath channel requires sophisticated equalization algorithms. Thus, computational complexity reduction has motivated the use of dithered signed-error constant modulus algorithm (DSE-CMA) to replace the widely used CMA algorithm. In ...

In this paper, the problem of channel estimation for LTE Downlink system in the environment of high mobility presenting non-Gaussian impulse noise interfering with reference signals is faced. The estimation of the frequency selective time varying multipath fading channel is performed by using a channel estimator based on a nonlinear complex Support Vector Machine Regression (SVR) which is appli...

In this paper, the problem of channel estimation for LTE Downlink system in the environment of high mobility presenting non-Gaussian impulse noise interfering with reference signals is faced. The estimation of the frequency selective time varying multipath fading channel is performed by using a channel estimator based on a nonlinear complex Support Vector Machine Regression (SVR) which is appli...