Title:
【発明の名称】符号化QAMシステム
Document Type and Number:
Japanese Patent JP3242914
Kind Code:
B2
Abstract:
PCT No. PCT/GB91/01259 Sec. 371 Date Mar. 22, 1993 Sec. 102(e) Date Mar. 22, 1993 PCT Filed Jul. 26, 1991 PCT Pub. No. WO92/02092 PCT Pub. Date Feb. 6, 1992.A block of output symbols is generated, using quadrature amplitude modulation, from a block of input bits. The input bits are processed, using one or more redundant codes having a Hamming distance greater than one, to produce digital words which control the in-phase components and digital words which control the quadrature components of the output symbols. A group of bits generated by a single coding step supplies bits for both types of digital word, thereby enabling that coding step to process simultaneously a larger number of bits than would be the case if separate coding were used for producing the two types of word.
More Like This:
| WO/2023/240623 | DATA COMMUNICATION METHOD AND APPARATUS |
| WO/2024/060235 | RESOURCE CONFIGURATION METHOD AND DEVICE |
Inventors:
Williams, Richard Guy Carrington
Brownlee, John David
Brownlee, John David
Application Number:
JP51343591A
Publication Date:
December 25, 2001
Filing Date:
July 26, 1991
Export Citation:
Assignee:
British Telecommunications Public Limited Company
International Classes:
H04L27/00; H04L27/34; H04L1/00; (IPC1-7): H04L27/00; H04L1/00; H04L27/34
Domestic Patent References:
| JP63237646A |
Other References:
【文献】欧州特許出願公開282298(EP,A1)
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)