Title:
システム性能向上のためのチャネルサウンディング
Document Type and Number:
Japanese Patent JP5254282
Kind Code:
B2
Abstract:
A transmitter generates and transmits a low rate signal to its intended receiver. Upon receiving the low rate signal, the intended receiver generates and transmits a channel sounding response (CSR), said CSR being a short burst having a predefined transmit format and carrying predetermined information. The transmitter then analyzes the CSR and determines uplink channel response, estimates downlink channel response, and determines appropriate transmit parameter settings based on the analysis and downlink response estimate. Adjustment of the transmit parameters can be made in either the MAC or PHY layer or in a combination of both. After adjusting its transmit parameters and modulating sub-carriers with user-data according to the determined transmit settings, the transmitter transmits the user-data to the receiver on a preferred portion of bandwidth. In a preferred embodiment, the transmitter also generates and transmits a transmit format control (TFC) signal containing the determined transmit parameter settings, including sub-carrier modulation information, to the receiver.
Inventors:
Joseph S. Levy
Application Number:
JP2010172781A
Publication Date:
August 07, 2013
Filing Date:
July 30, 2010
Export Citation:
Assignee:
Interdigital Technology Corporation
International Classes:
H04W72/04; H04B7/02; H04J11/00; H04J99/00; H04W16/28; H04W52/42
Domestic Patent References:
| JP2004523934A | ||||
| JP2006513674A | ||||
| JP2004180313A | ||||
| JP200480110A |
Foreign References:
| WO2002103943A1 | ||||
| WO2004054191A1 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Atsuhiro Hamanaka
Nakanishi Eiichi
Kazuo Abe
Atsuhiro Hamanaka
Nakanishi Eiichi