AGC system, AGC method, and receiver using the AGC system

An AGC system which is used in a receiver of a direct conversion system, comprising:

• a controller which controls an AGC gain update timing in a slot format of a received signal to occur in different positions within subsequent slots of the received signal in a specified sequence,
• wherein the received signal has a slot format of a CDMA system, and
• the amount of shift of the AGC gain update timing is set to be larger than a period corresponding to one reception symbol of the CDMA system.

An automatic gain control (AGC) method, comprising:

• controlling, in a receiver comprising a direct conversion system which converts a received signal directly from RF to baseband, an AGC gain update timing in a slot format of the received signal to occur in different positions within subsequent slots of the received signal in a specified sequence.

An AGC method which is used in a receiver of a direct conversion system, comprising:

• controlling an AGC gain update timing in a slot format of a received signal to occur in different positions within subsequent slots of the received signal in a specified sequence,
• wherein the received signal has a slot format of a CDMA system, and
• the amount of shift of the AGC gain update timing is set to be larger than a period corresponding to one reception symbol of the CDMA system.

A computer readable medium having stored therein a program for causing a computer to execute an automatic gain control (AGC) method, said program including computer executable instructions for performing a control process for controlling, in a receiver comprising a direct conversion system which converts a received signal directly from RF to baseband, shift of an AGC gain update timing in a slot format of the received signal in a specified sequence.

An automatic gain control (AGC) system, comprising:

• a gain latch circuit which latches a calculated gain value and outputs the calculated gain value at an AGC update time occurring in different positions within subsequent slots of a received signal in a specified sequence;
• and
• a timing generator which controls the AGC update time for outputting the calculated gain value from the latch circuit.