Title:
CELL SEARCH METHOD AND CIRCUIT IN W-CDMA SYSTEM
Document Type and Number:
Japanese Patent JP3473695
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a cell search method and a circuit capable of making a cell search without using a matched filter.
SOLUTION: This cell circuit is equipped with a code generator 12 which generates a P-search code in a slot timing identification step 1, an S-search code in a frame timing identification step 2, and a P-scrambling code in a scrambling code identification step 3. A correlator 11 carries out inverse spreading processing by the use of the P-search code in step 1, inverse spreading processing by the use of the S-search code in step 2, and inverse spreading processing by the use of the scrambling code in step 3. A power calculator 13 calculates a correlation power. A memory 14 stores the output of the power calculator 13. A detector 15 retrieves the maximum value of the correlation power stored in the memory 14. A judging part 16 judges the average and maximum value of the correlation power stored in the memory 14 by means of threshold coefficients in steps 2 and 3. A control 10 controls the operational timing of the above parts. The circuit is provided with the above six constituent units.
Inventors:
Kiyoshi Tsuneki
Yuuichi Maruyama
Yuuichi Maruyama
Application Number:
JP2000260608A
Publication Date:
December 08, 2003
Filing Date:
August 30, 2000
Export Citation:
Assignee:
NEC Electronics Corporation
NEC Microsystems, Ltd.
NEC Microsystems, Ltd.
International Classes:
H04B1/707; H04B1/7083; H04W36/36; H04W48/16; H04W52/02; H04W56/00; (IPC1-7): H04B1/707; H04Q7/22
Domestic Patent References:
| JP10200447A | ||||
| JP11340874A | ||||
| JP2000209124A | ||||
| JP2000134135A | ||||
| JP2001358612A | ||||
| JP200186034A |
Other References:
【文献】3G TS 25.213 V3.3.0,3GPP,2000年 6月13日
Attorney, Agent or Firm:
Asamichi Kato