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The article proposes a kind of joint relay and antenna selection scheme with the optimal power allocation in full-duplex(FD) cognitive relay network(CRN), including a pair of source and destination node, some FD amplify-and-forward (AF) relays and one primary user. In this work, the transmit (Tx) antenna and receive (Rx) antenna of each relay are selected adaptively. Then, the relay under optimal...
The key indicators of analog to digital converter (ADC) are effective number of bits (ENOB) and spurious-free dynamic range (SFDR). ENOB would affect the input signal to noise ratio (SNR), and SFDR indicates the degree of spurious introduced by non-linear. The characteristics of multi ADC in antenna array would not be the same, which make the quantization noise introduced by ENOB and spurious indicated...
In this paper, we proposed a WLAN system interference evaluation model based on received signal power and working channels which reflects the system interference in the current channel configuration. Based on this model, we proposed a simple and effective channel assignment scheme in which a set of channels with minimum system interference values were selected as the APs working channels. Simulation...
Channel mismatch has become a serious limit to further improve the anti-jamming performance on satellite navigation antenna arrays receivers. Consistency degree of each channel could directly determine the anti-jamming performance. In order to analyze and confirm the channel consistency indexes, this paper analyzes the impact of channel mismatch on interference cancellation ratio (ICR), firstly. According...
The Physical Layer Security (PLS) technology has been proved to be an effective way to reduce information leakage in wireless communication networks. This paper discusses the problem of secure transmission for Amplify-and-Forward (AF) cooperative network which contains both an external eavesdropper and some untrusted relays at the same time, where each relay acts as a helper of transmitting information...
Narrowband interference (NBI) in power line is the major impediments of application for OFDM-based power line communication. Receiver synchronization error is the biggest problem for narrowband interference on the power line communication system. Therefore, this thesis is based on OFDM power line communication system, studies the narrowband interference influence on power line communication system...
Interference Alignment (IA) as an effective interference management mechanism has become a hot spot in the field of wireless communication systems in recent years. In order to investigate the significance of IA technique to downlink cellular networks, we propose a new way based on the rank constrained rank minimization theory in this paper. Our proposed algorithm aims at finding out the pre coding...
In order to improve anti-jamming performance of GNSS receivers, the Automatic Gain Control (AGC) system is commonly utilized. AGC is able to scale the analog input voltage to an optimal level of the ADC. Few studies have investigated how AGC impacts the signal processing of GNSS receivers in pulsed interference conditions. This paper studies the performance of GNSS receivers with AGC in the presence...
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