Patent ID: 8649466
Filing Date: 2014-02-11
Classification: H04L

Abstract:
1. A device for detecting a cyclic prefix length, comprising: a plurality of cyclic prefix length searchers that receive a received signal from a transmitting apparatus to search different cyclic prefix lengths for the received signal; a normalizer that receives and normalizes a plurality of search results received from each of the plurality of cyclic prefix length searchers and outputs a plurality of normalization values; and a determining unit that determines any of the plurality of normalization values as a cyclic prefix length of the received signal, wherein the normalizer further outputs any one of the plurality of search results as a reference maximum value, and wherein the determining unit determines the cyclic prefix length searched by any one of the plurality of cyclic prefix length searchers as the cyclic prefix length of the received signal, and wherein each cyclic prefix length searcher among the plurality of cyclic prefix length searchers outputs a search result, each search result is normalized, and the normalized search result among the plurality of normalized search results having the least samples exceeding a threshold value is determined as the cyclic prefix length of the received signal, and wherein the normalizer comprises: a plurality of maximum value searchers that search a maximum value of each of the plurality of search results; and a plurality of reciprocal calculators that calculate reciprocal values of each of the plurality of maximum values.