Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels
The IEEE 802.11ac wireless local area network (WLAN) standard has adopted beamforming (BF) schemes to improve spectral efficiency and throughput with multiple antennas. To design the transmit beam, a channel sounding process to feedback channel state information (CSI) is required. Due to sounding ov...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/920937 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832567655131774976 |
|---|---|
| author | Heejung Yu Taejoon Kim |
| author_facet | Heejung Yu Taejoon Kim |
| author_sort | Heejung Yu |
| collection | DOAJ |
| description | The IEEE 802.11ac wireless local area network (WLAN) standard has adopted beamforming (BF) schemes to improve spectral efficiency and throughput with multiple antennas. To design the transmit beam, a channel sounding process to feedback channel state information (CSI) is required. Due to sounding overhead, throughput increases with the amount of transmit data under static channels. Under practical channel conditions with mobility, however, the mismatch between the transmit beam and the channel at transmission time causes performance loss when transmission duration after channel sounding is too long. When the fading rate, payload size, and operating signal-to-noise ratio are given, the optimal transmission duration (i.e., packet length) can be determined to maximize throughput. The relationship between packet length and throughput is also investigated for single-user and multiuser BF modes. |
| format | Article |
| id | doaj-art-70c0c9d80e304ce1b48dfa644dc91865 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-70c0c9d80e304ce1b48dfa644dc918652025-02-03T01:00:51ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/920937920937Beamforming Transmission in IEEE 802.11ac under Time-Varying ChannelsHeejung Yu0Taejoon Kim1Department of Information and Communication Engineering, Yeungnam University, Gyeongsan 712-749, Republic of KoreaSchool of Information and Communication Engineering, Chungbuk National University, Cheongju 361-763, Republic of KoreaThe IEEE 802.11ac wireless local area network (WLAN) standard has adopted beamforming (BF) schemes to improve spectral efficiency and throughput with multiple antennas. To design the transmit beam, a channel sounding process to feedback channel state information (CSI) is required. Due to sounding overhead, throughput increases with the amount of transmit data under static channels. Under practical channel conditions with mobility, however, the mismatch between the transmit beam and the channel at transmission time causes performance loss when transmission duration after channel sounding is too long. When the fading rate, payload size, and operating signal-to-noise ratio are given, the optimal transmission duration (i.e., packet length) can be determined to maximize throughput. The relationship between packet length and throughput is also investigated for single-user and multiuser BF modes.http://dx.doi.org/10.1155/2014/920937 |
| spellingShingle | Heejung Yu Taejoon Kim Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels The Scientific World Journal |
| title | Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels |
| title_full | Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels |
| title_fullStr | Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels |
| title_full_unstemmed | Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels |
| title_short | Beamforming Transmission in IEEE 802.11ac under Time-Varying Channels |
| title_sort | beamforming transmission in ieee 802 11ac under time varying channels |
| url | http://dx.doi.org/10.1155/2014/920937 |
| work_keys_str_mv | AT heejungyu beamformingtransmissioninieee80211acundertimevaryingchannels AT taejoonkim beamformingtransmissioninieee80211acundertimevaryingchannels |