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Spatial Sequence Estimation Based Decoding Algorithm for V-BLAST

Summary: Spatial Sequence Estimation Based Decoding
Algorithm for V-BLAST
Maruf Mohammad, Samir Al-Ghadhban, B. Woerner, and W. Tranter
Mobile and Portable Radio Research Group
Virginia Polytechnic Institute and State University
E-Mail: {maruf, samir}@vt.edu
Abstract--In this paper we introduce a novel detection algorithm
for V-BLAST. The original V-BLAST detector is based on a
serial interference cancellation (SIC) algorithm. Although the
algorithm is relatively simple to implement, it does not achieve
the performance predicted by theoretical analysis. The nulling
operation reduces the receive diversity and the serial processing
results in unequal diversity advantage for different layers. Also
the error propagation severely degrades the performance. A
detection algorithm for V-BLAST based on sequence estimation
is proposed. The concept of maximum likelihood sequence
estimation (MLSE) is applied to combat spatial interference.
State reduction techniques are also considered for practical
implementation. Simulation results show that the proposed
algorithm outperforms interference cancellation based


Source: Al-Ghadhban, Samir - Electrical Engineering Department, King Fahd University of Petroleum and Minerals


Collections: Energy Storage, Conversion and Utilization