Bibliographic Details
| Title: |
A New Approach for Fast Generalized Sphere Decoding in MIMO Systems. |
| Authors: |
Zongkai Yang, Chao Liu, He, Jianhua |
| Source: |
IEEE Signal Processing Letters; Jan2005, Vol. 12 Issue 1, p41-44, 4p, 1 Graph |
| Subject Terms: |
DECODERS & decoding, DECODERS (Electronics), ANTENNAS (Electronics), MIMO systems, ALGORITHMS |
| Abstract: |
A new generalized sphere decoder (GSD), called a double-layer sphere decoder (DLSD), is proposed for under-determined MIMO systems with fewer receive antennas N than transmit antennas M. The proposed algorithm is significantly faster than those introduced in [1] and [2]. The basic idea is to partition the transmitted signal vector into two subvectors with M - N + 1 and N - 1 elements. After some simple transformations, we can use an outer layer sphere decoder (SD) to choose proper subvectors of length M - N + 1 and then use an inner layer SD to decide the other subvector of length N - 1, thus the whole transmitted signal vector is obtained. Simulation results show that DLSD has far less complexity than the existing GSDs. [ABSTRACT FROM AUTHOR] |
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