Title:
【発明の名称】チャネル特性に基づく適応符号化を用いた送信方法及び送信システム
Document Type and Number:
Japanese Patent JP2001507886
Kind Code:
A
Abstract:
A transmitter receives information for transmission to a receiver over a communication channel. A cyclical redundancy checking (CRC) code circuit encodes the information with CRC code for error detection purposes. The CRC coded information is provided to a code switch. The code switch provides the CRC coded information to either a first code circuit or a second code circuit for forward error correction (FEC) coding. The first code circuit may, for example, encode the information using a FEC Code 1, such as convolutional coding, and the second code circuit may encode the information using a FEC Code 2, such as repetition coding. The code switch selects either the first or second code circuit based on detected characteristics of the channel. The channel characteristics may be obtained from a channel estimation circuit, may be obtained from an error feedback signal I3 from the receiver or may be obtained from a combination of both. After the code switch selects the first or second code circuit, the information is appropriately coded to produce a coded signal which is transmitted over the channel by a transmission circuit.
Inventors:
Dent, Paul, Wilkinson
Hasan, Aimer, Aleph.
Hasan, Aimer, Aleph.
Application Number:
JP53002298A
Publication Date:
June 12, 2001
Filing Date:
December 16, 1997
Export Citation:
Assignee:
Ericsson Incorporated
International Classes:
H03M13/11; H03M13/23; H04L1/00; H04L27/01; H04L1/08; (IPC1-7): H04L1/00; H03M13/11; H04L27/01
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)