Automatic Gain Control Method and Communications Device in Wireless Local Area Network

A communications device, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions to:
• generate a physical layer packet, wherein the physical layer packet comprises a high efficiency long training field, wherein the high efficiency long training field comprises N symbols, wherein a length of a cyclic prefix (CP) of a first symbol in the N symbols is greater than or equal to a minimum length for a receiver device to perform automatic gain control (AGC) estimation, and wherein N is a positive integer;
• and
• send the physical layer packet to the receiver device.

A communications device, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions to:
• receive a physical layer packet from a sender device, wherein the physical layer packet comprises a high efficiency long training field, wherein the high efficiency long training field comprises N symbols, wherein a length of a cyclic prefix (CP) of a first symbol in the N symbols is greater than or equal to a minimum length for a receiver device to perform automatic gain control (AGC) estimation, and wherein N is a positive integer;
• and
• perform AGC estimation in accordance with the CP of the first symbol in the N symbols of the high efficiency long training field.