Global system for mobile communication (GSM) and general packet radio service (GPRS) power ramping controller and associated power ramping method

A power ramping controller of a transmitter comprising frames for transmitting, each frame comprising a plurality of slots, each slot comprising a data period and a guard period for classifying continuous slots of the plurality of slots, the power ramping controller comprising:

• a ramp memory for dividing power levels of the plurality of slots within a power level range and storing the divided power level range from a lowermost address to an uppermost address;
• a first register for storing a start address of the ramp memory for designating a power level of a first slot of the plurality of slots;
• a second register for storing a final address of the ramp memory for designating a power level of a second slot of the plurality of slots;
• a counter for
• allocating the start address to a lower index,
• allocating the final address to an upper index,
• increasing the lower index by 1 and subtracting 1 from the start address, and
• decreasing the upper index by 1 and subtracting 1 from the final address;
• a comparator for comparing an address obtained by subtracting 1 from the start address with an address obtained by subtracting 1 from the final address;
• a third register for storing a counter index and an address at a time when a difference obtained by subtracting the start address from the final address is 0 or 1;
• and
• a ramp controller for designating the address stored in the third register as an inflection address and determining ramp steps as power levels stored in addresses which correspond to a final address of the upper index from a start address of the lower index via the inflection address at the guard period.

A method for ramping power in a transmitter comprising frames for transmitting, each frame comprising a plurality of slots, each slot comprising a data period and a guard period for classifying continuous slots of the plurality of slots, the method comprising:

• dividing power levels of the plurality of slots within a power level range and storing the divided power level range from a lowermost address to an uppermost address;
• receiving a start address of a ramp memory for designating a power level of a first slot of the plurality of slots and a final address of the ramp memory for designating a power level of a second slot of the plurality of slots;
• allocating the start address to a lower index of a counter and increasing the lower index by 1 and subtracting 1 from the start address;
• allocating the final address to an upper index of the counter and decreasing the upper index by 1 and subtracting 1 from the final address;
• designating an address, at a time when a difference obtained by subtracting the start address from the final address is 0 or 1, as an inflection address, and determining ramp steps as power levels stored in addresses corresponding to the indices of the counter at the guard period;
• and
• outputting power levels of the plurality of slots in response to the ramp steps.

A method for ramping power in a transmitter comprising frames for transmitting, each frame comprising a plurality of slots, each slot comprising a data period and a guard period for classifying continuous slots of the plurality of slots, the method comprising:

• dividing power levels of the plurality of slots within a power level range and storing data that represents the divided power level range from a lowermost address to an uppermost address;
• receiving a start address of a ramp memory for designating a power level of a first slot of the plurality of slots;
• receiving a final address of the ramp memory for designating a power level of a second slot of the plurality of slots;
• allocating the start address to a lower index of a counter and increasing the lower index by 1 and subtracting 1 from the start address;
• allocating the final address to an upper index of the counter and decreasing the upper index by 1 and subtracting 1 from the final address;
• comparing an address obtained by subtracting 1 from the start address with an address obtained by subtracting 1 from the final address;
• storing a counter index and an inflection address at a time when a difference obtained by subtracting the start address from the final address is 0 or 1;
• receiving the data stored in addresses which correspond to a final address of the upper index from a start address of the lower index via the inflection address in response to a ramping active signal that represents a start time of the plurality of slots;
• and
• dividing the guard period into a number of indices of the counter and allocating a ramp waveform characteristic of the guard period according to the data stored in the addresses corresponding to the number of indices of the counter.

A method for ramping power ramping in a transmitter comprising frames for transmitting, each frame comprising a plurality of slots, each slot comprising a data period and a guard period for classifying continuous slots of the plurality of slots, the method comprising:

• initializing a counter;
• dividing power levels of the of the plurality of slots within a power level range and storing data that represents the divided power level range from a lowermost address to an uppermost address;
• receiving a start address of a ramp memory for designating a power level of a first slot of the plurality of slots;
• receiving a final address of the ramp memory for designating a power level of a second slot of the plurality of slots;
• storing an inflection index and an inflection address at a time when a difference obtained by subtracting the start address from the final address is 0 or 1;
• increasing an index of the counter by 1 in response to a ramping active signal that represents a start time of the plurality of slots;
• subtracting 1 from the start address until the index of the counter becomes the inflection index and allocating the start address to a ramping address;
• wherein if the index of the counter is greater than the inflection index and the ramping address is not the final address, adding 1 to the inflection index;
• and
• allocating a ramp waveform characteristic of the guard period according to the data stored in ramping addresses.