| Presentation | 2012-01-27 Low Complexity Channel Estimation for MIMO-Constant Envelope Modulation Ehab Mahmoud Mohamed, Osamu Muta, Hiroshi Furukawa, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | MIMO-Constant Envelope Modulation, MIMO-CEM, with Low Resolution ADC receiver (1-bit ADC in the default operation) is considered as one of the alternative candidates to the well known MIMO-OFDM, suitable for wireless backhaul network in which relay nodes are fixed in their positions. Due to the low resolution ADC, MIMO-CEM channel estimation is considered as one of the major problems to withstand its real application. The authors have proposed an adaptive MIMO-CEM channel estimator based upon replicating the received preamble signal to exactly estimate the non-linear effect of the low resolution ADC. Because MIMO-CEM ADC is Intermediate Frequency (IF) sampled, the authors replicated the whole IF MIMO-CEM transceiver to exactly replicate the received preamble signal. Although this channel estimator has an excellent performance, its computational complexity is very high. This high complexity comes from the IF (high frequency) calculations. In this paper, we introduce a low complex MIMO-CEM adaptive channel estimator based upon linearly modeling the quantization error occurred at the low resolution IF sampled ADC, using linear curve fitting, in baseband. Hence, a baseband adaptive channel estimator can be designed, which has a much lower complexity than the IF estimator (previously designed by the authors). We prove the effectiveness of the proposed estimator under different channel scenarios using MSK and GMSK modulations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MIMO / Constant envelope modulation / Channel estimation / Block based adaptive filter / Low resolution ADC |
| Paper # | SIP2011-96,RCS2011-285 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2012/1/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | Low Complexity Channel Estimation for MIMO-Constant Envelope Modulation |
| Sub Title (in English) | |
| Keyword(1) | MIMO |
| Keyword(2) | Constant envelope modulation |
| Keyword(3) | Channel estimation |
| Keyword(4) | Block based adaptive filter |
| Keyword(5) | Low resolution ADC |
| 1st Author's Name | Ehab Mahmoud Mohamed |
| 1st Author's Affiliation | Advanced Information Technology Department, Kyushu University:Electrical Engineering Department, Faculty of Engineering, South Valley University, Egypt.() |
| 2nd Author's Name | Osamu Muta |
| 2nd Author's Affiliation | Advanced Information Technology Department, Kyushu University:Electrical Engineering Department, Faculty of Engineering, South Valley University, Egypt. |
| 3rd Author's Name | Hiroshi Furukawa |
| 3rd Author's Affiliation | Advanced Information Technology Department, Kyushu University:Electrical Engineering Department, Faculty of Engineering, South Valley University, Egypt. |
| Date | 2012-01-27 |
| Paper # | SIP2011-96,RCS2011-285 |
| Volume (vol) | vol.111 |
| Number (no) | 404 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |