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A decision-feedback equalizer (DFE) for Multi-h CPM in aeronautical telemetry is presented in this paper. This algorithm estimates the inter-symbol interference and cancels it from the samples used to make the bit decisions. The approach improves the bit estimates sequentially, thereby increasing the probability of obtaining accurate estimates. Simulation results show an 1 dB improvement in bit error...
BPSK interference is also called the matched spectrum interference, because its wave form and frequency coverage matches that of satellite navigation signal. As efficient wideband interference, it heavily menaces the safety of Global Navigation Satellite System (GNSS) and is taken as an important target of interference monitoring. However, there are hardly any researches on signal separation and parameter...
In this paper, an SLNR based cascaded interference align precoding algorithm is proposed according to the study on interference suppression in downlink coordinated multipoint transmission system. In this algorithm, cascaded precoding is adopted rather than delivering channel state information (CSI) among cells to deal with inter and inner cell interference stage by stage. In the first stage, interferences...
In this paper, the effect of the imperfect channel stated information (CSI) on the system performance of the radio resource management is investigated for the uplink transmission in multi-user CDMA systems. The imperfect CSI introduces the constellation-point dependent symbol error rate (SER), which correspondingly yields the nonconvex and nondifferentiable throughput function. Then, a bisection based...
In this paper, we investigate the combination of Orthogonal Frequency Division Multiplexing with Offset Quadrature Amplitude Modulation (OFDM/OQAM) with spread spectrum Code Division Multiple Access (CDMA) transmission scheme as an alternative to classical Multicarrier-CDMA (MC-CDMA) system over multipath fading channel. The performance of real CDMA-OFDM/ OQAM transmission system with Walsh Hadamard...
In Long Term Evolution (LTE) systems, some subcarriers at the borders of the allocated bandwidth are known as virtual subcarriers which are not used for data transmission. Conventional DFT-based channel estimation methods encounter performance degradation due to low SNR and the edge effect caused by virtual subcarriers. Adding virtual carrier frequency responses (VCFR) properly at receivers is proved...
In this paper, we consider a Generalized Joint Channel Network Coding (GJCNC) applied to Physical Layer Network Coding (PLNC) for Two Way Relay Channel (TWRC). For this purpose, two correlated sources A and B desire to exchange information with each other by the help of a relay R. PLNC allows the relay to decode the combined information of both sources from the superimposed information. A Low Density...
In this paper, considering the problem of performance loss due to limited feedback in multiuser MIMO downlink systems, a novel limited feedback precoding for multiuser MIMO systems based on array preprocessing is proposed. The maximum SINR criteria is used for selecting optimal codeword from the Grassmannian codebook and perturbation codeword at the receiving, and feedback the Grassmannian precoding...
Feedback delay often exists in actual communication systems. Relay selection with feedback delay was based on outdated channel state information, which would seriously deteriorate the performance of cooperative communication system. In cooperative system, the best relay is selected to participate in process of information transmission, which can save system power and reduce costs. In this paper, we...
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