发明名称 |
METHOD FOR DETECTING PHASE ROTATING AMOUNT, METHOD AND APPARATUS FOR DETECTING FREQUENCY ERROR, METHOD AND APPARATUS FOR CONTROLLING FREQUENCY AS WELL AS COMMUNICATION TERMINAL |
摘要 |
PROBLEM TO BE SOLVED: To provide an automatic frequency control apparatus capable of detecting a phase difference between two symbols without using a multiplier, and hence detecting a difference between a carrier frequency of a receiver side and a carrier frequency of a transmitter side without using a multiplier. SOLUTION: A method for controlling the frequency comprises: a step of obtaining IQ coordinates nearest to a second symbol of a plurality of IQ coordinates obtained by rotating the IQ coordinates of a first symbol, and the first symbol by a predetermined phase on an IQ coordinate axis; a step of obtaining the rotating direction of the second symbol to the IQ coordinates nearest to the second symbol; and a step of inferring a phase rotating amount between the first symbol and the second symbol based on the IQ coordinates of the first symbol, the IQ coordinates nearest to the second symbol, a rotating direction of the second symbol to the IQ coordinates nearest to the second symbol, and the predetermined phase. |
申请公布号 |
JP2002101145(A) |
申请公布日期 |
2002.04.05 |
申请号 |
JP20000289323 |
申请日期 |
2000.09.22 |
申请人 |
SANYO ELECTRIC CO LTD |
发明人 |
NAGATA KEIZO;HIROSE SHINTARO;KATO SEIJI |
分类号 |
H04L27/38;H04B1/707;H04B1/7087;H04L7/00;H04L27/227 |
主分类号 |
H04L27/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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