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In this paper, multiple-input multiple-output (MIMO) systems employing both transmit and receive antenna selection (TAS/RAS) are examined for independent and identically distributed (i.i.d.) flat Nakagami-m fading channels. Exact bit error rate (BER) expression for binary phase shift keying (BPSK) and binary frequency shift keying (BFSK) modulations are derived by using the moment generating function...
In this study, automatic recognition of digitally modulated signals is investigated using the Continuous Wavelet Transform (CWT) in conjunction with techniques typically used in pattern recognition. In particular, the method of template matching is used. The templates used for the Automatic Modulation Recognition (AMR) process are determined based on the features, i.e., fractal patterns in the scalograms,...
This article develops a mathematical framework for analyzing the average bit error rate (ABER) performance of four different selection diversity combining (SDC) schemes over slow, frequency non-selective Nakagami-m fading channels. Aside from the traditional SDC, generalized selection combining (??-GSC) and 'maximum matched filter output' selection methods, two new selection rules based on choosing...
A novel algorithm for Signal-power-to-Noise-power ratio (SNR) estimation in AWGN channel is proposed in this paper. The relationship between SNR and the distribution of instantaneous phase (DIP) of BPSK signal is investigated, and the SNR estimator is constructed according to this relationship. Correlation coefficients are used to judge the similarity of the DIP between the theoretical one and the...
In this paper, we consider techniques for communicating in the presence of interference. In particular, we consider the simple scenario of a BPSK communication system in the presence of a constant modulus (CM) interferer. Using computer simulations and analytical approximations, we compare the performances of four detectors for recovering the communications signal in an additive white Gaussian noise...
According to BPSK + STBC and QPSK + STBC (space-time block codes) wireless transmission system of two launch antenna and one or two receiving antenna, 8PSK+STBC high-speed wireless transmission system is proposed first in the research, and the transmission scheme is compared and simulated with Monte Carlo simulation from two aspects of noise performance and spectrum efficiency. The research results...
Cooperative diversity enables single antenna transmitter in a multi-user or relay environment to share the antennas so as to achieve diversity gain. In this work, the cooperative communication system with distributed Alamouti code is investigated, where amplify-and-forward (AF), adaptive decode-and-forward (DF) or hybrid AF/DF are used at the relay, with both Rayleigh fading and path loss effect introduced...
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