Title:
CARRIER DETECTION CIRCUIT AND COMMUNICATION EQUIPMENT
Document Type and Number:
Japanese Patent JP3186718
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide the carrier detection circuit that detects a carrier at a high speed while preventing mis-detection of the carrier.
SOLUTION: An RSSI block integration circuit 101 that receives an RSSI signal converted into a digital signal through A/D conversion calculates the RSSI signal at a low level, an RSSI level addition circuit 103 adds a prescribed level to the low level, and a comparator circuit 104 compares the threshold value resulting from the output of the circuit 103 with an RSSI signal that is sequentially integrated with an RSSI moving integration circuit 102 to discriminate the presence of a carrier.
Inventors:
Shigeru Sakuma
Application Number:
JP32860998A
Publication Date:
July 11, 2001
Filing Date:
November 18, 1998
Export Citation:
Assignee:
NEC
International Classes:
H03K9/00; H04B1/10; H04J3/00; H04B1/16; H04B17/00; H04B17/318; H04K1/00; H04Q7/22; H04L; (IPC1-7): H04B17/00; H04B1/10
Domestic Patent References:
| JP10224242A | ||||
| JP1188256A | ||||
| JP2243035A | ||||
| JP36165A | ||||
| JP6303680A |
Attorney, Agent or Firm:
Johei Yamashita