Title:
【発明の名称】CDMA受信装置における復調回路
Document Type and Number:
Japanese Patent JP2982797
Kind Code:
B1
Abstract:
To improve the capacity of coherent detection of the spread spectrum (SS) signal, when interference and noise can not be neglected, an amplitude phase estimation unit outputs a transmission line estimation value including fluctuations in the transmission lines, using known pilot signals of which transmission sequences are known. The pilot signal is extracted from the despread signal through despreading filter. A reliability measurement unit pursues a reliability value of transmission line estimation value. An interpolation unit generates vectors for compensating the phase, by deciding a method of interpolation on the basis of the reliability. A coherent detection unit compensates the amplitude and phase of information symbol to execute the coherent detection.
Inventors:
KOMATSU MASAHIRO
Application Number:
JP21919998A
Publication Date:
November 29, 1999
Filing Date:
August 03, 1998
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
H04B1/707; H03K9/00; H04B7/01; H04L1/20; H04L7/00; (IPC1-7): H04B1/707; H04B7/01; H04L7/00
Domestic Patent References:
| JP8335898A | ||||
| JP8191285A | ||||
| JP9270734A | ||||
| JP1051424A |
Other References:
【文献】国際公開96/471(WO,A1)
【文献】国際公開97/33400(WO,A1)
【文献】国際公開97/33400(WO,A1)
Attorney, Agent or Firm:
Tadashi Wakabayashi (4 others)