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In this paper, we propose a novel medium wave broadcast transmitting system on the basis of DRM standard. The Coded OFDM is implemented to encoding and modulating broadcasting signals. To enhance the field intensity of target transmission direction, the system applies the eight elements vertical circular phased array as the transmitting antenna array. In addition, the signal processing mechanism of...
This paper proposes a fast recursive algorithm for Group-wise Space-Time Block Code (G-STBC), which takes full advantage of the Alamouti structure in the equivalent channel matrix to reduce the computational complexity. With respect to the existing efficient algorithms for G-STBC, the proposed algorithm achieves better performance and usually requires less computational complexity.
The coexistence issues between UWB and WiMAX systems at 3.5GHz frequency band has been recently attached much attention. For investigating the potential interference of ultra-wideband (UWB) on a WiMAX system, an analysis method based on the physical layer modeling was presented. The physical layer models of impulse radio (IR) UWB, multi-band orthogonal frequency division multiplex (MB-OFDM) UWB and...
In this paper, we propose a novel interference alignment (IA) scheme via convex optimization based on minimum mean square error criterion subject to individual transmit power constraints for the MIMO interference channel system. We show that transceiver under such criterion can be realized through an efficient iterative algorithm. The convergence of the proposed algorithm is discussed. Simulation...
In this paper, we propose a new signal dimensioning scheme for multi-user MIMO downlink, that adjusts the signal dimensions for different users to maximize the system throughput. By adapting the signal dimensions, we can achieve better tradeoff between multiplexing and diversity, and obtain much better bit rate error performance and higher capacity.
To guarantee the next generation narrow band systems from Ultra Wideband (UWB) interference, the coexistence issue between OFDM-MIMO system and UWB system is studied in the indoor environment, using physical layer model simulation method. Based on the corresponding standards, OFDM-MIMO and UWB system models are established with the SIMULINK tool. Considering the environment and system parameters,...
Considering the potential interference of ultra-wideband (UWB) on narrowband communication systems, this paper studies coexistence issue between UWB with both impulse radio (IR) and multiband (MB) modulation and IEEE802.11n system, using physical layer modelling strategy. According to the physical characteristics of UWB and the victim system, entire physical layer models are set up. Based on the requirements...
In this paper, we propose a novel iterative interference alignment (IA) scheme for the single-input single-output (SISO) interference channel system using minimum total mean square error criterion under the individual transmitter power constraints. We show that interference alignment under such criterion could be realized through an iterative algorithm. The convergence of the proposed algorithm is...
In this paper, an interference alignment system for the distributed MIMO network is investigated. We propose a new precoding scheme using interference alignment in modulation signal domain. The simulation results show that the proposed one-dimensional precoding scheme can provide significant performance improvement over the conventional schemes using interference alignment.
In this paper, we propose a new interference alignment (IA) scheme designing jointly the linear transmitter and receiver for the MIMO interference channel system, using minimum total mean square error criterion, subject to individual transmit power constraints. We show that transmitter and receiver under such criterion could be realized through a joint iterative algorithm. The convergence of the proposed...
In this paper, we propose an improved precoding scheme using interference alignment on modulation signal for multi-user MIMO downlink transmission. The simulation shows that the new precoding scheme can significantly reduce interference and provide much better bit error rate performance than the conventional precoding schemes for multi-user MIMO.
Eliminating the interferences among antennas is the first issue for effectively utilizing the spatial degree of freedoms of multiple-input multiple-output (MIMO) systems. Singular value decomposition (SVD) method plays an important role for interference elimination through a joint transceiver way, where the singular vectors are often used for linear unitary precoding (UP). However, directly applying...
For these communication systems whose transmitted waveforms have a much closed signal space, such as the attractive Ultra Narrow-band (UNB) modulation technology, it is rather toilsome to obtain the satisfactory performance because of the difficulty in accurately determining the threshold of the optimum receiver, which is mainly caused by its tiny waveform dipartition as well as the unruly DC variant...
In this paper, an interference alignment system for the MIMO network is investigated. Three different precoding schemes, which are based on zero-forcing (ZF), minimum mean square error (MMSE) and maximum SLR criteria, are proposed. The simulation results show that the proposed precoding schemes are very efficient and can provide good performance for the considered MIMO network.
In this paper, a self-constructing fuzzy neural networks with extended Kalman filter (SFNNEKF) is proposed. The whole network generalization capability is considered in the hidden neuron growing criterion, which makes the growing process more smoothly. The extended Kalman filter method is used to adjust the free parameters of the fuzzy neural networks. The proposed SFNNEKF learning algorithm is evaluated...
In this report, the performance analysis of 10Gbps optical receiver for fiber optical link is presented. Non-Return to Zero (NRZ) electrical signals from a Pseudo-Random Bit Sequence (PRBS) Generator are used as modulation input. Signals in the optical domain are detected at the PIN photodiode (PIN-PD) and are converted into electrical output signals. These electrical signals are filtered through...
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