Title:
BASE STATION
Document Type and Number:
Japanese Patent JP3691723
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve an interference rejection effect and a RAKE synthetic gain by making the scale of a multiplier small and also facilitating performing of adaptive control for an interference suppression coefficient.
SOLUTION: Reception synchronous processing parts 00-1 to 00-m perform correlation detection processing between a diffusion code proper to a user and a multiple spectrum spread signal. The number of stage concerned valid paths adders 2-1 to 20-n take the total amount of the number of valid paths in each different diffusion ratio about all users to be housed in the interference rejection circuit of the stage. Interference cancel units 10-0-1 to 10-n-m generate user replica signals from a received multiple spectrum spread signal. Replica signal synthesizes 30-1 to 30-n combine the user replica signals. Interference suppression coefficient control parts 40-1 to 40-n output the optimum interference suppression coefficient on the basis of the total amount of the number of valid paths in each different diffusion ratio. Interference suppression coefficient multiplying parts 50-1 to 50-n multiply the combined user replica signal by the interference suppression coefficient. Replica signal subtracting parts 60-1 to 60-n subtract the combined replica signal, subjected to interference suppression coefficient multiplication, from a multiple spectrum spread signal outputted from delay elements 70-1 to 70-n of the stage.
Inventors:
Naoki Tsubaki
Takeshi Ishida
Jouichi Saito
Nakahara Adult
Toshinori Suzuki
Yoshio Takeuchi
Niida Tsutomu
Takeshi Ishida
Jouichi Saito
Nakahara Adult
Toshinori Suzuki
Yoshio Takeuchi
Niida Tsutomu
Application Number:
JP2000125894A
Publication Date:
September 07, 2005
Filing Date:
April 26, 2000
Export Citation:
Assignee:
Hitachi Communication Technology Co., Ltd.
KDDI CORPORATION
KDDI CORPORATION
International Classes:
H01Q3/26; H04B1/10; H04B1/7107; H04B1/7117; H04B7/02; H04B7/08; H04B7/26; H04J13/00; H04W16/28; H04W88/08; (IPC1-7): H04J13/04; H01Q3/26; H04B1/10; H04B7/02; H04B7/08; H04B7/26
Domestic Patent References:
| JP11317725A | ||||
| JP11298371A | ||||
| JP2000078108A | ||||
| JP11252045A | ||||
| JP10051353A | ||||
| JP11274984A | ||||
| JP11186991A |
Attorney, Agent or Firm:
Ken Hashizume
Previous Patent: METHOD FOR PRODUCING NATURALLY FOLDED AND SECRETED PROTEIN
Next Patent: SYSTEM CONTROLLER AND WATER HEATING EQUIPMENT EQUIPPED WITH IT
Next Patent: SYSTEM CONTROLLER AND WATER HEATING EQUIPMENT EQUIPPED WITH IT