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Filter bank multicarrier (FBMC) modulation has many nice features compared with conventional cyclic prefix-based orthogonal frequency multiplexing (CP-OFDM) and has been considered as a promising waveform candidate for future 5G wireless communication. Combining FBMC with multiple-input multiple-output (MIMO) technology may achieve high data rate. In this paper, we propose the K-Best algorithm based...
In this paper, a practical precoder for EST-based modulation to obtain transmit diversity in frequency-selective channel is considered. First, we design the finite impulse response (FIR) filter based matched filter bound (MFB) as precoder at the transmitter. Then the criterion which evaluates the overall performance of EST-based iterative receiver and adjust the length of FIR filter is proposed.
In this paper we study secondary adjacent channel usage between airport surveillance radar (ASR) and long-term evolution (LTE) in 2700–2900 MHz radar band. Various methods and scenarios of compatibility assessment are presented. Compatibility studies entail both parties (primary user (PU) and secondary user (SU)) being able to operate well without causing harmful electromagnetic interference to each...
A multi-pair large-scale multi-antenna relaying system is considered in this paper. We investigate the energy efficiency (EE) performance by taking the circuit power consumption into account when maximum ratio combining/maximum ratio transmission is explored at the relay station (RS). By utilizing the law of large numbers, an analytical expression of EE is derived. Based on this, we characterize the...
In this paper, we consider an uplink massive MIMO systems with dual-antenna users, and investigate the performance of several popular transmission schemes, such as orthogonal space-time block coding (OSTBC), transmit beamforming (TB) and transmit antenna selection (TAS). The achievable sum rate lower bound and asymptotic power scaling performance when M →∞ are presented, where M is the number of base...
Existing work on the precoding scheme for multibeam satellite systems assumes the availability of perfect channel state information (CSI) at the satellite transmitter. Unfortunately, this assumption is not applicable to mobile satellite systems because of long propagation delays, and this is especially true for the geostationary earth orbit (GEO) satellite systems. In this paper, we present a linear...
In a spectrum-sharing system (SSS), deploying the antennas in a distributed manner can provide a new spatial dimension for the efficient reuse of licensed frequency bands. In order to improve the sum rate of multiple secondary-users (SUs), this paper addresses the problem of coordinated multi-SU spectrum sharing in a distributed antenna-based SSS. By adopting the Hungarian method and the primal decomposition...
Sparse code multiple access (SCMA) is a new multiple access technique with reusing non-orthogonal code domain resource. It has massive connectivity serving a large number of users and improves spectral efficiency of radio access. SCMA directly maps the information bits of different users to sparse complex codewords selected from the predefined codebooks, and each codeword represents a transmission...
Coordinated transmission is an effective way to deal with the inter-cell interference (ICI) problem in a multi-cell distributed antenna system (DAS). However, in a practical scenario, the inter-cell channel state information (CSI) is usually imperfect, consequently causing a significant performance degradation of coordinated transmission. In this paper, to tackle this difficulty, we propose a coordinated...
In this paper we introduce frequency hopping spread spectrum (FHSS) into Diagonal Bell Laboratories Layered Space-Time (D-BLAST) Multiple Input Multiple Output (MIMO) architecture. We evaluate the performance of the system containing a single interference affecting the system with various probabilities and power. An LDPC code and BPSK modulation is used as a test case to obtain message bit error rate...
We consider 2×2 X channels with 2M antennas at each node where each transmitter has local channel state information at transmitter (CSIT) and each receiver has full channel state information at receiver (CSIR). We propose an interference alignment (IA) scheme that achieves both the optimal degrees of freedom (DoF) of 8M/3 and the diversity order of 2 using stacked Alamouti codes. Particularly, the...
The three-user multiple-input multiple-output interference channel under i.i.d. fading is studied, where the transmitters have the delayed channel state information. The case where all transmitters and all receivers are equipped with M and N antennas, respectively, is considered. For this case, a new transmission scheme is proposed that achieves a number of degrees of freedom higher than previously...
this paper presents a distributed protocol that supports power control and directional spectrum reuse for TDMA-based MANET waveforms. This protocol was developed as an add-on module to a distributed resources manager designed to provide MANET nodes with neighborhood spectrum utilization information, as well as perform dynamic negotiation of the available shared spectrum. The protocol utilizes spectrum...
In this paper, we consider massive MIMO in two-layer Heterogeneous Networks. The system has a large self-interference and co-channel interference due to operating in full-duplex mode. By using Game Theory, an optimized sum-rate is achieved. We investigate the potential sum-rate before and after the optimization under the power constraints. It is shown that the game theoretical method performed a very...
The minimum protection distance of meteorological receiving earth station in L band is analyzed in this paper, beyond which the receiving earth station in the frequency band 2200–2300MHz (L band) will not be interfered by the 4G LTE terminals. The methods to use in determination of the minimum protection distance are based on the ITU-R Recommendation P.1546-5 and the simulation analysis tool Wrap...
Generalized Frequency Division Multiplexing (GFDM) is a recently proposed multicarrier waveform which is being considered as one of the possible candidates for 5G wireless access technology. Key advantages of GFDM are flexibility and low spectral side-lobes which render it the ability of carrier aggregation and reduced adjacent channel interference. However due to its non-orthogonal nature GFDM suffers...
In this paper, we investigate the effects of interference among the cell edge users under cooperative non-orthogonal multiple access (NOMA) system. The base stations (BSs) cooperative with each other for downlink transmission. The information rate of cell-edge users (CEU) are derived for two system models: first model with inter-user (i.e., Users on the same cell edge) interference only and second...
In this paper, a low computational complexity and flexible Cyclic Delay receive scheme is proposed for the receiver in the uplink, in which more than two transmit antennas is hard to locate in one mobile device. By summing up the shifted copy of the received signal at different receive antennas, the multi-path channels of the Single Input and Multiple Output (SIMO) system are cascaded into an equivalent...
Interference Alignment (IA) in heterogeneous networks (HetNets) is a promising technique that improves the spectral efficiency significantly. We showed in [1] that transmit antennas at pico BSs could be utilized more efficiently by clustering pico cells in IA in HetNet where the clustering formation was optimized so as to minimize the rate loss caused by inter-cluster interference. In [1], the optimum...
A key challenge in operating cognitive radios (CRs) in a self-organizing (ad hoc) network is to adaptively and efficiently allocate transmission powers and spectrum among CRs according to the surrounding environment. Cognitive radio networks provide high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques. CR networks inflict challenges due to...
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