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The impulsive noise effect is one of the most dominant factors to cause performance degradation for power-line communication (PLC) links. Most reported literatures characterize such an impulsive noise based on the Bernoulli-Gaussian or Middleton's approach. However those models may not truly depict the noise characteristics of the impulses with stable property. The symmetric alpha-stable (SαS)...
We study bit-error rate performance of subcarrier binary phase-shift keying (BPSK) and quadrature phase-shift keying (QPSK) systems with carrier phase error (CPE) in log-normal turbulence channels. The CPE is modeled as a Tikhonov random variable. We quantify the CPE induced asymptotic noisy reference losses using an auxiliary random variable method. Both approximate and exact calculations of the...
Device-to-device (D2D) communication is an emerging technique that can reduce device transmission power and enhance cellular capacity, which allows direct communication between two mobile devices. Amount of small packets may exchange between devices in burst mode transmission with the constraint of low overhead and low complexity for energy efficient processing. One of the major challenges for outband...
In wireless orthogonal frequency division multiplexing (OFDM) systems, the knowledge of signal-to-noise ratio (SNR) plays an important role for system optimization. Most of the exiting literatures have studied the SNR estimation for perfect synchronization in additive white Gaussian noise (AWGN) channels, or in frequency selective channels. However, the realistic channels are always doubly selective,...
The Direct Sequence Spread Spectral (DSSS) communication system has been widely used in military and civilian fields because of its high processing gain, strong ant-jamming and anti-probed capacity, and low intercepted probability. In this paper, an efficient blind parameter estimating and detecting algorithm is proposed, which takes advantage of the autocorrelation property of pseudo random code...
In this paper, a joint frame detection and timing estimation scheme for burst Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed in double selective channels. The proposed scheme based on the training sequence is not sensitive to carrier frequency offset (CFO) and the given threshold for frame detection is robust to different signal-to-noise ratio (SNR). Simulation results demonstrate...
In this paper, focusing on the spectrum sharing and competition, we propose a double auction based spectrum trading (DAST) scheme which resolves the spectrum access between the primary network (PN) and secondary networks (SNs) subtly. Two different utility functions for primary users (PUs) and secondary users (SUs) are designed basing on a supply-and-demand relationship between them. Also, we adopt...
In most wireless relay networks, the source and relay nodes transmit successively via fixed time division (FTD) and each relay forwards a packet immediately upon receiving. In this paper we enable the buffering capability of relay nodes and propose a framework for joint scheduling and relay selection. The goal is to maximize the system long-term throughput by fully exploiting multi-user diversity...
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