In this paper, a simple downlink transmit scheme joint beamforming (BF) with space-time block coding (STBC) is proposed for cooperative base stations (BS). By deriving the equivalent signal-to-noise ratio (SNR) at the receiver, we first obtain the optimal BF weight vectors and the allocated power coefficients in terms of maximizing the statistical mutual… (More)
To improve the scientific and efficiency of anti-jamming communication system, this paper design an in anti-jamming communication decision engine based on Particle Swarm Optimization for multiple parameters selecting adaptively. The procedure of the proposed method is presented. Simulation is made in six models, the results show that the decision engine can… (More)
A novel fuzzy jamming recognition approach based on complexity measure of received signal is proposed. The proposed algorithm exploits the LZ complexity and box dimension of received signal as classified characters of jamming pattern. After the mean center and variance of each jamming pattern are calculated by some jamming samples, exponential fuzzy… (More)
To realize the autonomous adjustment function of the system parameters of the anti-jamming decision engine, a kind of swarm intelligence optimization algorithm- binary artificial bee colony (BABC) algorithm was used for reference. Decision method of communication anti- jamming based on binary artificial bee colony was proposed. In order to realize the… (More)
Spectrum sensing algorithms based on power spectral density (PSD) are an important category in spectrum sensing approaches. In this paper, a new PSD estimation method based on compressed sensing (CS) and the Blackman-Tukey (BT) approach is proposed. First, the low-rate measurement sequence of the received signal is obtained by CS. Second, the… (More)
Anti-jamming capability of wireless communication equipment is discussed widely in recent years. In the light of fuzzy characteristic in capability evaluation, a new evaluation measure for Anti-jamming (AJ) capability, which is based on the 2-tuple linguistic information and maximum deviation weight algorithm, is proposed in this paper. Firstly, the AJ… (More)
—To estimate the wideband or multi-channel signals' spectrum swiftly and exactly is a key technology to improve the performance of wideband spectrum sensing.
HAPS has become a hot research issue due to low free space loss, low system investment and high flexible local coverage in recent years. The various frequency bands have been assigned for HAPS applications by International Telecommunication Union (ITU). The interference between HAPS and FSS is unavoidable because of the same frequency band and the overlap… (More)