| Presentation | 2013-04-19 Adaptive Sparse Channel Estimation Methods for Time-Variant MIMO Communication Systems Guan GUI, Fumiyuki ADACHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Channel estimation problem is one of key technical issues in time-variant multiple-input multiple-output (MIMO) communication systems. To estimate the MIMO channel, least mean square (LMS) algorithm was applied to adaptive channel estimation (ACE). Since the MIMO channel is often described by sparse channel model, such sparsity could be exploited and then estimation performance could be improved by adaptive sparse channel estimation (ASCE) methods using sparse LMS algorithms. However, conventional ASCE methods have two main drawbacks: 1) sensitive to random scale of training signal and 2) unstable in low signal-to-noise ratio (SNR) region. To overcome the two harmful factors, in this paper, we propose a novel ASCE method using normalized LMS (NLMS) algorithm (ASCE-NLMS). In addition, we also proposed an improved ASCE method using normalized least mean fourth (NLMF) algorithm (ASCE-NLMF). Two proposed methods can exploit the channel sparsity effectively. Also, stability of the proposed methods is confirmed by mathematical derivation. Computer simulation results show that the proposed sparse channel estimation methods can achieve better estimation performance than conventional methods. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | least mean square(LMS) / least mean fourth(LMF) / normalized LMF(NLMF) / adaptive sparse channel estimation(ASCE) / multiple-input multiple-output(MIMO) |
| Paper # | RCS2013-20 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2013/4/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Adaptive Sparse Channel Estimation Methods for Time-Variant MIMO Communication Systems |
| Sub Title (in English) | |
| Keyword(1) | least mean square(LMS) |
| Keyword(2) | least mean fourth(LMF) |
| Keyword(3) | normalized LMF(NLMF) |
| Keyword(4) | adaptive sparse channel estimation(ASCE) |
| Keyword(5) | multiple-input multiple-output(MIMO) |
| 1st Author's Name | Guan GUI |
| 1st Author's Affiliation | Department of Communications Engineering, Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Fumiyuki ADACHI |
| 2nd Author's Affiliation | Department of Communications Engineering, Graduate School of Engineering, Tohoku University |
| Date | 2013-04-19 |
| Paper # | RCS2013-20 |
| Volume (vol) | vol.113 |
| Number (no) | 8 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |