Name
Abstract | ||
|---|---|---|
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 IEEE 802.11a. 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 IEEE 802.11 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 0.4 dB 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 = 100 ns, it is found that the proposed scheme degrades the required E-b/N-0 only by approximately 1.5 dB compared to the MIMO channel estimation only case, even if the packet length is 1000 bytes with 64QAM and coding-rate = 7/8. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1093/ietcom/e90-b.1.92 | IEICE TRANSACTIONS ON COMMUNICATIONS |
Keywords | Field | DocType |
wireless LAN, MIMO, OFDM, packet mode, synchronization | MIMO-OFDM,Synchronization,Computer science,Network packet,Computer network,MIMO,Wi-Fi array,Wireless lan,Wireless LAN controller,Orthogonal frequency-division multiplexing | Journal |
Volume | Issue | ISSN |
E90B | 1 | 0916-8516 |
Citations | PageRank | References |
1 | 0.37 | 0 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Takeshi Onizawa | 1 | 39 | 11.20 |
| Takafumi Fujita | 2 | 4 | 2.88 |
| Yusuke Asai | 3 | 54 | 15.85 |
| Daisei Uchida | 4 | 7 | 2.57 |
| atsushi ohta | 5 | 66 | 15.31 |
| Satoru Aikawa | 6 | 35 | 9.39 |