A Synchronization Scheme for Packet Mode MIMO-OFDM Signals in Wireless LAN(Terrestrial Radio Communications)
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概要
- 論文の詳細を見る
This paper proposes a new multi-task synchronization scheme for packet mode orthogonal frequency division multiplexing (OFDM) signals in multi-input multi-output (MIMO) transmission systems; it targets high-rate wireless LANs that offer over 100Mbit/s. In addition, this paper introduces a packet format for MIMO-OFDM signals that ensures backward compatibility with IEEE802.11a. The proposed synchronization scheme has simple open-loop construction and consists of automatic frequency control (AFC), symbol timing detection, MIMO channel estimation, and phase tracking. AFC and symbol timing detection are carried out in the time-domain. After OFDM demodulation, the proposed scheme performs MIMO channel estimation and phase tracking in the frequency-domain. Considering all of the above synchronization tasks, we evaluate the packet error rate (PER) performance using the IEEE802.11 TGn-defined channel model-D and model-E. In channel model-D with the RMS delay spread=50ns, the proposed scheme shows superior performance; it suppress the required E_b/N_0 degradation to within 0.4dB with 1000 byte packets compared to the performance achieved if only MIMO channel estimation is considered. Moreover, in channel model-E with the RMS delay spread=100ns, it is found that the proposed scheme degrades the required E_b/N_0 only by approximately 1.5dB compared to the MIMO channel estimation only case, even if the packet length is 1000 bytes with 64QAM and coding-rate=7/8.
- 社団法人電子情報通信学会の論文
- 2007-01-01
著者
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OHTA Atsushi
NTT Network Innovation Laboratories, NTT Corporation
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ONIZAWA Takeshi
NTT Access Network Service Systems Laboratories, NTT Corporation
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AIKAWA Satoru
NTT Access Network Service Systems Laboratories, NTT Corporation
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Ohta Atsushi
Ntt Network Innovation Laboratories Ntt Corporation
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Ohta Atsushi
Ntt Corporation
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Ohta A
Mitsubishi Electric Corp. Itami‐shi Jpn
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Onizawa Takeshi
Ntt Access Network Service Systems Laboratories Ntt Corporation
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UCHIDA Daisei
NTT Network Innovation Laboratories, NTT Corporation
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ASAI Yusuke
NTT Access Network Service Systems Laboratories, NTT Corporation
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ASAI Yusuke
NTT Network Innovation Laboratories, NTT Corporation
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Fujita T
Ntt Network Innovation Laboratories Ntt Corporation
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FUJITA Takafumi
NTT Network Innovation Laboratories, NTT Corporation
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Ohta A
Ntt Network Innovation Laboratories Ntt Corporation
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Asai Yusuke
Ntt Access Network Service Systems Laboratories Ntt Corporation
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Asai Yusuke
Ntt Network Innovation Laboratories Ntt Corporation
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Fujita Takafumi
Ntt Network Innovation Laboratories Ntt Corporation
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Onizawa T
Ntt Access Network Service Systems Laboratories Ntt Corporation
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Onizawa Takeshi
Ntt Corp. Yokosuka‐shi Jpn
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Uchida Daisei
Ntt Corp. Yokosuka‐shi Jpn
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Uchida Daisei
Ntt Network Innovation Laboratories Ntt Corporation
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Aikawa S
Ntt Access Network Service Systems Laboratories Ntt Corporation
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Aikawa Satoru
Ntt Access Network Service Systems Laboratories Ntt Corporation
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ONIZAWA Takeshi
NTT Access Network Service Systems Laboratories
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