In this paper, performance of a Turbo Code (TC) and Vertical Bell lab.ratories Layered Space Time (VBLAST) encoded wireless link is evaluated in the presence of Rayleigh fading for Multiple-Input Multiple-Output (MIMO...
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A general construction of inter-group complementary (IGC) codes is proposed based on perfect complementary (PC) codes,interleaving operation,and the orthogonal *** correlation properties of the newly constructed IGC c...
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A general construction of inter-group complementary (IGC) codes is proposed based on perfect complementary (PC) codes,interleaving operation,and the orthogonal *** correlation properties of the newly constructed IGC codes can be described as follows:(1) the autocorrelation sidelobes of the codes are zeros in the zero correlation zone (ZCZ);(2) the cross-correlation functions (CCFs) between any two different codes of the same group are zeros in the ZCZ;(3) the CCFs between any two codes of different groups are zeros *** key point of this construction is that the ZCZ length of the generated IGC codes can be chosen *** is well known that there is a limitation between the ZCZ length and the number of mates;that is,the smaller is the length of ZCZ,the more are the IGC codes that can be ***,if we can choose the ZCZ length of the IGC codes flexibly according to the requirement of the system,more users can be accommodated in the system.
With the development of high-speed railway all over the world, the reliability and communication of bullet train depends on the wireless communication between train and Base Stations (BSs) along the railroad. Traditio...
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In this paper, a novel communication system is introduced, i.e., the frequency-hopping multiple-access OFDM-BPSK communication system. Based on characteristic function method, the bit error rate (BER) performance of t...
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ISBN:
(纸本)9781424423736
In this paper, a novel communication system is introduced, i.e., the frequency-hopping multiple-access OFDM-BPSK communication system. Based on characteristic function method, the bit error rate (BER) performance of the system is derived in additive white Gaussian noise (AWGN) and Rayleigh fading channels. The numerical results firstly indicate the relationship between BER and the parameters such as the size of frequency slots set Nh, the number of OFDM subcarriers N and the number of users Nu. By the numerical and simulation results, the frequency resource of OFDM-BPSK-FHMA system is saved and the BER is decreased under the same parameter compared with other similar communication systems.
The high speed railway wireless communication system is much different from public wireless communication system, because the service is train control messages, which is closely related to the safety of train transpor...
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For the next generation wireless communication systems, inter-cell interference (ICI) is the primary cause of performance degradation in cell edge mobile stations of OFDMA multi-hop cellular networks with the frequenc...
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ISBN:
(纸本)9781424428472
For the next generation wireless communication systems, inter-cell interference (ICI) is the primary cause of performance degradation in cell edge mobile stations of OFDMA multi-hop cellular networks with the frequency reuse pattern (1, 3, 1). This paper introduces a new fractional frequency reuse scheme to assign radio resources in OFDMA multi-hop networks to reduce inter-cell interference and maintain the sector frequency reuse factor at 1. Through the numerical analysis, we find that this scheme can yield higher SINR and improve the system capacity. Furthermore, the results also indicate that fractional frequency reuse relay system with local forwarding scheme can achieve higher throughput than local forwarding scheme in conventional relay system.
In the OFDMA-based cellular relay networks, relay selection and resource allocation are the main problem to be solved. Many present works about resource allocation are for the goal of throughput maximization. In this ...
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Recently, Chung et al. gave a general method to construct frequency-hopping sequence set(FHS set) with low-hit-zone(LHZ FHS set) by the Cartesian product. In their paper, Theorems 5 and 8 claim that k FHS sets whose m...
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Recently, Chung et al. gave a general method to construct frequency-hopping sequence set(FHS set) with low-hit-zone(LHZ FHS set) by the Cartesian product. In their paper, Theorems 5 and 8 claim that k FHS sets whose maximum periodic Hamming correlation is 0 at the origin result in an LHZ FHS set based on the Cartesian product, and Proposition 4 presented an upper bound of the maximum periodic Hamming correlation of FHSs. However, their statements are imperfect or incorrect. In this paper, we give counterexamples and make corrections to them. Furthermore, based on the Cartesian product, we construct two classes of LHZ FHS sets with optimal maximum periodic partial Hamming correlation property. It is shown that new FHS sets are optimal by the maximum periodic partial Hamming correlation bound of LHZ FHS set.
Complex field network coding (CFNC) scheme offers a promising scheme to enable multiuser cooperative communication. In this paper, an error control coding is utilized in the CFNC scheme for multiuser cooperative commu...
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Recently, the scaling law has been extended to approximate the waterfall performance for Turbo codes over the binary erasure channel. However, the waterfall approximation over other channels, such as the AWGN and Rayl...
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