Patent ID: 7792233

Claim:
A packet preamble search method in a communication system for locating a packet preamble with multiple predetermined patterns of a predetermined regular form of a packet wherein the predetermined pattern has a predetermined bit length, comprising: receiving a transmission signal with sequential multiple patterns, and each pattern having the predetermined bit length; sequentially comparing the pattern of the transmission signal with the predetermined pattern using a comparator, and increasing a hit count when the pattern of the transmission signal matches the predetermined pattern; and activating an address matching procedure when the hit count is greater than or equal to a predetermined threshold value, wherein sequential comparison of the pattern of the transmission signal with the predetermined pattern further comprises: resetting a miss count when the pattern of the transmission signal matches the predetermined pattern; increasing the miss count and decreasing the hit count when the pattern of the transmission signal does not match the predetermined pattern; and resetting the hit count and the miss count when the hit count is less than or equal to the miss count.