Method and apparatus for compensating prach decimation filter for detection of prach preamble in wireless communication system

Abase station in a wireless communication system, the base station comprising:

• a transceiver;
• one or more processors comprising processing circuitry;
• and
• memory storing instructions,
• wherein the instructions, when executed by the one or more processors individually or collectively, cause the base station to:
• receive, from a user equipment (UE) through the transceiver, a signal comprising a physical random access channel (PRACH) preamble;
• detect the received PRACH preamble by identifying a first frequency response of a PRACH decimation filter in a PRACH detector;
• divide subcarriers for receiving the PRACH preamble into subcarrier segments;
• obtain a representative weight for each subcarrier segment of the subcarrier segments;
• apply linear interpolation to representative weights of adjacent subcarrier segments from among the subcarrier segments;
• compensate for distortion in the first frequency response of each segment of the subcarrier segments by applying, to a first subcarrier signal of the PRACH preamble, a weight to which the linear interpolation has been applied as a compensation weight;
• and
• output a second subcarrier signal corresponding to a second frequency response in which the distortion has been compensated.

A method performed by a base station in a wireless communication system, the method comprising:

• receiving, from a user equipment (UE), a physical random access channel (PRACH) preamble;
• detecting the received PRACH preamble by identifying a first frequency response of a PRACH decimation filter in a PRACH detector;
• dividing subcarriers for receiving the PRACH preamble into subcarrier segments;
• obtaining an average weight for each segment of the subcarrier segments as a representative weight for each subcarrier segment;
• compensating for distortion in the first frequency response of each segment of the subcarrier segments by applying, to a first subcarrier signal of the PRACH preamble, the representative weight as a compensation weight;
• and
• outputting a second subcarrier signal corresponding to a second frequency response in which the distortion has been compensated.

Abase station in a wireless communication system, the base station comprising:

• a transceiver;
• one or more processors comprising processing circuitry;
• and
• memory storing instructions,
• wherein the instructions, when executed by the one or more processors individually or collectively, cause the base station to:
• receive, from a user equipment (UE) through the transceiver, a signal comprising a physical random access channel (PRACH) preamble;
• detect the received PRACH preamble by identifying a first frequency response of a PRACH decimation filter in a PRACH detector;
• divide subcarriers for receiving the PRACH preamble into subcarrier segments;
• obtain an average weight for each segment of the subcarrier segments as a representative weight for each subcarrier segment;
• compensate for distortion in the first frequency response of each segment of the subcarrier segments by applying to a first subcarrier signal of the PRACH preamble, the representative weight for each subcarrier segment as a compensation weight;
• and
• output a second subcarrier signal corresponding to a second frequency response in which the distortion has been compensated.