亞洲知識產權資訊網為知識產權業界提供一個一站式網上交易平台，協助業界發掘知識產權貿易商機，並與環球知識產權業界建立聯繫。無論你是知識產權擁有者正在出售您的知識產權，或是製造商需要購買技術以提高操作效能，又或是知識產權配套服務供應商，你將會從本網站發掘到有用的知識產權貿易資訊。

返回搜索結果

Successive Transmit Beamforming Algorithms for Multiple-Antenna OFDM Systems

技術應用: This invention can be used for the existing and next generation wireless communication systems. It can be adopted for any OFDM wireless system with multiple transmit antennas. For example, it can be used in IEEE 802.11n WiFi system or the emerging WiMax systems. Another major area of application is the communication systems in the defense industry.

詳細技術說明: In order to reduce the channel feedback requirement in the OFDM system, University researchers have developed an algorithm that takes the time and frequency domain correlation of the channel fading into consideration. Based on our successive beamforming (SBF) technique, we develop several classes of feedback algorithms for the OFDM systems. These new algorithms use the knowledge from the previous frame or neighboring subcarrier to aid the beamforming codebook design for the current subcarrier. Through numerical simulations, researchers have demonstrated that the proposed SBF algorithms require very little channel feedback, yet they provide better performance than that of the other existing OFDM beamformers. In addition, it is shown that different SBF algorithms behave differently in various fading environments, and the most suitable algorithm for the given fading scenario was determined using a numerical sweeping approach. The major difference between this invention and the prior art is that the University's invention addresses transmit beamforming for a time varying frequency selective fading channel, whereas known solutions have assumed quasi-static fading channels.

*Abstract: In this paper, we focus on the design and evaluation of new transmit beamforming algorithms for the multiple-input single-output (MISO) orthogonal frequency division multiplexing (OFDM) systems. The OFDM technique is very effective in combating frequency selective fading since it converts the broadband channel into several parallel flat fading channels. However, to implement transmit beamforming, the channel state information on each individual subcarrier has to be conveyed from the receiver to transmitter.

*Principal Investigation: Name: Hamid Jafarkhani
Department:

Name: Li Liu
Department:

附加資料: Patent Number: US8315323B2
Application Number: US200864616A
Inventor: Liu, Li | Jafarkhani, Hamid
Priority Date: 24 Aug 2005
Priority Number: US8315323B2
Application Date: 4 Sep 2008
Publication Date: 20 Nov 2012
IPC Current: H04B000702
US Class: 375267 | 375260 | 375296 | 375299 | 375347 | 375349
Assignee Applicant: The Regents of the University of California
Title: Successive transmit beamforming methods for multiple-antenna orthogonal frequency division multiplexing (OFDM) systems
Usefulness: Successive transmit beamforming methods for multiple-antenna orthogonal frequency division multiplexing (OFDM) systems
Summary: Used for transmit beamforming that is utilized in an orthogonal frequency division multiplexing wireless system (claimed) for transmitting signals over a single transmission path for communication.
Novelty: Transmit beamforming method for orthogonal frequency division multiplexing wireless system, involves performing successive beamforming for each of subcarriers, and determining fading parameter at transmitter or receiver

欲了解更多信息，請點擊這裡