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Researchers in the field of computer networking often relies on appropriate simulators to diagnose network and to analyze the impact of various parameters on the network performance. There now exists several simulators (in the areas of wireless ad-hoc network) that offer various features to measure network performance. One such simulator that recently gained high popularity among researchers in the...
The design of measurement matrices is one of the key contents of the compressed sensing (CS) theory. This paper constructs a new dual-structured measurement matrix-unit array + random matrix, by combining the advantages of the random measurement matrices with high recovery probability and the structured measurement matrices of low storage. The experiments show that the reconstruction errors can be...
In the coexistence scenario of NB-IoT and LTE system, several factors affect the evaluating indicators of system performance. Considering the narrow bandwidth character of NB-IoT system, the simulation result would be over-optimistic if the evaluation method about ACLR and ACS in coexistence study of LTE system is still used. In this paper, a new evaluation method about ACLR and ACS is proposed aimed...
CV-QKD has drawn many attentions due to the potential to provide high secret key rate and low cost. Error reconciliation is the key module of post processing of a CV-QKD system. In this paper, an improved LDPC-based SEC error reconciliation scheme is proposed. Through the optimization of inner-level decoding and reduction of the iteration rounds of inter–level decoding, the reconciliation can be accelerated...
Repeating decoys (based on DRFM), through the main lobe into the radar receiver, realistically simulate real target's echo in both time and frequency domain, and cause serious threat to radar's search, identification and tracking. At the near distance, angular error caused by target's angular glint is an important noise source and it can be utilized to the discrimination of repeating decoys. At the...
Paired carrier multiple access (PCMA) technique is widely used in satellite communications because it can save half satellite bandwidth. A NCLMS-based PCMA method is proposed and the NCLMS parameters effect on PCMA is studied in this paper. The NCLMS parameters include learning step and filter taps number. Under the same conditions, the simulation results show that: 1) NCLMS learning step affects...
The RFSCAT(Rotating Fan-beam SCATterometer) is one of the two payloads of CFOSAT, the China-France Oceanography Satellite. It is a radar scatterometer designed to measure the electromagnetic back-scatter from wind roughened ocean surface. The operating frequency of the scatterometer is 13.256GHz (Ku-band) and has a swath about 1,000 kilometers. In this paper, an end-to-end data simulation system of...
It is of great significance to choose the adaptive parameters of bistable system which not only ensure the phenomenon stochastic resonance can take palace but make the performance of the output signal optimum. In this paper, A precise parameter-tuned stochastic resonator (PSR) is proposed to improve the receiving performance of binary pulse amplitude modulated (BPAM) signal at low signal-to-noise...
This paper proposes an in-cell capacitive touch panel structure and a readout circuit (ROIC) to sense the variation in self-capacitance using a small number of sensing lines. The proposed touch panel structure sequentially senses the variation in self-capacitance by adding a thin-film transistor and a scan signal line into each touch sensor so that the number of sensing lines can be reduced. In addition,...
In the cognitive radios (CR), there is a security issue-spectrum sensing data falsification attacks (SSDF) in the process of cooperation. Some malicious users (MUs) who unwilling to cooperate friendly with other users may launch SSDF attacks by falsifying their local sensing information sent to fusion center (FC) intentionally, result in interfering with the detection and threat the CR networks. In...
It is well known that the full-duplex radio can enhance spectrum efficiency compared with half-duplex radio in inter-node interference free environment. However, in real situation, the inter-node interference is inevitable especially in the random access system whose performance is considerably affected by the interference. In this paper, we analyze the full-duplex system in random access scenario...
Nowadays, interest for compatible simulators with high flexibility to explore the performance of Wireless Local Area Networks (WLANs) is definitely increasing. One of the main reasons of such interest is the upcoming 5G technology, related to the Internet-of-Things (IoT). In this paper, we present a MATLAB-based link-level simulator for WLAN with still used (IEEE 802.11g/n/ac) and upcoming (IEEE 802...
In this paper, in order to reduce error propagation for cooperative systems, we propose and analyze two new threshold-based hybrid relay selection schemes for the three-node cooperative relaying system, named as hybrid amplify-decode-forward relaying (HADF) and direct-amplify-forward relaying (HDAF). When the signal-to-noise ratio (SNR) is higher than the specific threshold, which is designed in HDAF,...
In this paper, we propose two compressed sensing methods, signed CASS and iterative signed CASS. The effect of signs of entries in a sparse signal could lead to lower accuracy rate of CASS in low SNR region. Thus, signed CASS is proposed to take the signed of a sparse signal into account. The performance of signed CASS is better than CASS in low SNR region and comparable in high SNR region in terms...
In this paper, we give a closed form expression for the statistics of two independent exponential for two-hop links of vehicular networks. Then these statistics results help us to analyze the performance of two-hop vehicular communication networks with vehicle relay based on Amplify and Forward (AF) protocol over flat Rayleigh-fading channels. It is shown that the choice of gain of AF effects on bounds...
In this paper, we investigate the secrecy outage probability in a dual-hop decode-and-forward (DF) secondary cognitive radio network, which is equipped with one source, one destination, multiple eavesdroppers (EAVs) and multirelay. The direct links from the source to the destination and the EAVs are considered because of the moderate shadowing environment. All channels experience the Rayleigh fading...
In this paper, we consider an overlay cognitive radio network that transmits discrete-time analog sources over additive white Gaussian noise channels. Our focus is on the case where the primary and secondary sources are correlated. The secondary user (SU) knows the primary message non-causally, and allocates part of its power for transmitting the primary message. We study a hybrid digital-analog coding...
Device-to-Device (D2D) communications underlaying cellular networks can improve the network capacity and spectrum efficiency by sharing the cellular resources in the direct-transmission mode. However, the stringent interference between D2D and cellular systems can seriously repress the overall performance improvement. In this paper, we aim to solve this dilemma by applying the concept of differentiated...
In this paper, cooperative spectrum sensing based censored energy detection is considered in order to improve the accuracy of the decision made about the spectrum availability. Proposed two witnesses fusion rule is used to derive a spectrum sensing final decision. However, the accuracy of this decision cannot be ensured unless the best choice of the two decision thresholds is made such that the probabilities...
Cognitive radio (CR) has emerged as a promising solution to the spectrum scarcity problem, faced by all existing as well as newly proposed wireless services. In cognitive radio network (CRN) spectrum sensing plays the most important role and is considered as an integral part of CR. Among all the spectrum sensing schemes proposed in literature energy detection (ED) is commonly adopted due to its low...
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