Title:
【発明の名称】π/4シフトQPSK変調信号の判定回路
Document Type and Number:
Japanese Patent JP2969837
Kind Code:
B2
Abstract:
First two dimensional plane is defined by phase of modulated signal and first vector corresponding to first signal point to be decided is defined. Then, first inner product by the first vector and second vector corresponding to last decided signal point is made and the second vector is transformed into third vector which is ninety degrees advanced. Next, second inner product of the first vector and third vector is made and the region of the first signal is decided in the two dimensional plane in accordance with the first and second inner product.
Inventors:
SOGO AKIRA
Application Number:
JP18208490A
Publication Date:
November 02, 1999
Filing Date:
July 10, 1990
Export Citation:
Assignee:
YAMAHA KK
International Classes:
H04L27/227; H04L27/233; (IPC1-7): H04L27/227
Domestic Patent References:
| JP3278648A |
Attorney, Agent or Firm:
Masatake Shiga (2 outside)