Title:
デジタルブロードキャストチャネルのための非線形事前符号化方法
Document Type and Number:
Japanese Patent JP4210697
Kind Code:
B2
Abstract:
Several subscriber signals are transmitted simultaneously and at the same frequency by a central transmitter to several decentralized receivers which do not cooperate with each other, by digital message transmission in a broadcast channel. A common transmission signal, which enables an error-free individual reception, should be generated with knowledge of all subscriber signals and of the current transmission conditions, by signal preprocessing methods on the transmission side. Known nonlinear precoding methods totally suppress the interference signals, so that the channel diversity cannot be used. In the claimed precoding method, the occurring interference signals are, on the contrary, taken into account. On the basis of a modulo arithmetic calculation, the transmission channel is not totally equalized, but virtually divided, so that the transmission of the subscriber signals is continued periodically; the signals are selected according to the minimal transmission power and pre-equalized, in a linear manner, and the residual interferences, still remaining between the subscriber signals, may assume special values from a preset set of values. The set of values is selected, so that the interference signals of the other subscribers are also merely reflected in the otherwise already existing periodic continuation and can be suppressed or used as required by a modulo decision, on the reception side.
Inventors:
Roberto Fisher
Christoph Windthinger
Christoph Windthinger
Application Number:
JP2006519755A
Publication Date:
January 21, 2009
Filing Date:
July 07, 2004
Export Citation:
Assignee:
Siemens Aktiengesellschaft
International Classes:
H04J99/00; H04B7/005; H04B7/06; H04B7/08; H04B7/10; H04L1/06; H04L25/03
Foreign References:
| WO1998056121A1 | ||||
| WO2002100008A1 | ||||
| WO2003084092A1 | ||||
| WO2004038984A1 |
Other References:
Robert F.H,Fisher,他,Tomlinson-Harashima precoding in space-time transmission for low-rate backward channel,2002 International Zurich Seminar on Broadband Communications,IEEE,2002年
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel