Efficient Low Complexity Turbo Equalization with Soft Interference Cancellation in MIMO System

For the sake of reducing the hardware cost of multiple RF chains and the complexity for spatial multiplexing systems, in this paper a novel low-complexity transmit antenna selection criterion is proposed for V-BLAST system with MMSE OSIC detection. Based on MMSE extension of V-BLAST with sorted QR decomposition, an intuitional performance analysis of each sub-stream for MMSE V-BLAST transmission is done, and a new solution to the transmit antenna selection problem is suggested. Unlike most of the existing works, the proposed algorithm synthetically considers the impacts of detection order, interference cancellation, and noise amplification. Theoretical analysis and simulation results show that the proposed algorithm achieves well both in outage capacity and in symbol error rate performance with low computational complexity.

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PERFORMANCE SIMULATION ON LOW- COMPLEXITY LLL-BASED ALGORITHM FOR MIMO SYSTEM

Telecommunications and Radio Engineering ◽

10.1615/telecomradeng.v77.i14.30 ◽

2018 ◽

Vol 77 (14) ◽

pp. 1249-1264

Author(s):

D. Chunxiao ◽

Y. Fei

Keyword(s):

Mimo System ◽

Low Complexity ◽

Performance Simulation

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Low Complexity Soft Decision-Aided Equalizer for Turbo Equalization

2008 4th International Conference on Wireless Communications, Networking and Mobile Computing ◽

10.1109/wicom.2008.412 ◽

2008 ◽

Author(s):

Gaoqi Dou ◽

Jun Gao

Keyword(s):

Low Complexity ◽

Turbo Equalization ◽

Soft Decision

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Performance Analysis of Low Complexity Multiuser Scheduling Algorithms in MIMO System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.392.867 ◽

2013 ◽

Vol 392 ◽

pp. 867-871

Author(s):

Ming Xia Lv ◽

Yan Kun Lai ◽

Dong Tang

Keyword(s):

Mimo System ◽

Scheduling Algorithm ◽

Low Complexity ◽

Base Station ◽

User Scheduling ◽

Sum Capacity ◽

Multiuser Scheduling ◽

The Common ◽

The Cost ◽

Selection Algorithms

The total throughput of the communication system can be maximized by allocating the common radio resource to the user or the user group having the best channel quality at a given time and the multiuser diversity gain can be obtained when multiple users share the same channel at one time. The object to select the users is to select the users with the maximum sum capacity. As for a scheduling algorithm, exhaustive algorithm can get the largest capability of the system by multi-user scheduling. However, this algorithm is quite complex hence the cost of operation to a base station has substantial increased. We compare the multiuser performance of two fast user selection algorithms with low complexity in MIMO-MRC systems with co-channel interferences. From the simulation results, these two algorithms not only decrease the computational complexity of the scheduling algorithm but also retain large capability of the MIMO system.

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MMSE-NP-RISIC-Based Channel Equalization for MIMO-SC-FDE Troposcatter Communication Systems

Mathematical Problems in Engineering ◽

10.1155/2016/5158406 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Zedong Xie ◽

Xihong Chen ◽

Xiaopeng Liu ◽

Yu Zhao

Keyword(s):

Interference Cancellation ◽

Communication Systems ◽

Intersymbol Interference ◽

Mimo System ◽

Multiple Input Multiple Output ◽

Channel Equalization ◽

Single Input Single Output ◽

Single Carrier ◽

Single Output ◽

The Impact

The impact of intersymbol interference (ISI) on single-carrier frequency-domain equalization with multiple input multiple output (MIMO-SC-FDE) troposcatter communication systems is severe. Most of the channel equalization methods fail to solve it completely. In this paper, given the disadvantages of the noise-predictive (NP) MMSE-based and the residual intersymbol interference cancellation (RISIC) equalization in the single input single output (SISO) system, we focus on the combination of both equalization schemes mentioned above. After extending both of them into MIMO system for the first time, we introduce a novel MMSE-NP-RISIC equalization method for MIMO-SC-FDE troposcatter communication systems. Analysis and simulation results validate the performance of the proposed method in time-varying frequency-selective troposcatter channel at an acceptable computational complexity cost.

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