摘要 |
<p>The present invention relates to a method for automatic gain control (AGC) before an initial synchronization of a mobile station modem in OFDM system, and an apparatus thereof. The AGC apparatus includes: an initial synchronization inspector that verifies whether an initial synchronization for an input block sample (k) signal has been performed; a frame divider that divides a frame into predetermined intervals B(k) for the input block sample(k) signal in the case that the initial synchronization has not been performed; a reference value inspector that compares a difference value Pref-Pcalc, between a predetermined reference value Pref and sample data average energy Pcalc, with a predetermined value; a count controller that increases or decreases the count when the difference value Pref-Pcalc compared by the reference value inspector is greater or less than the predetermined value; a count inspector that inspects whether the count is greater or less than 0 when the input block sample (k) reaches a maximum value MAX; and a gain controller which increases or decreases the gain, level by level, according to the count inspection result of the count inspector.</p> |
申请人 |
UTE ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT;SAMSUNG ELECTRONICS CO., LTD.;KT CORPORATION;SK TELECOM CO., LTD.;KTFREETEL CO., LTD.;HANARO TELECOM, INC.;LEE, YONG-SU;PARK, YOUN-OK;KIM, JUN-WOO;BANG, YOUNG-JO |
发明人 |
LEE, YONG-SU;PARK, YOUN-OK;KIM, JUN-WOO;BANG, YOUNG-JO |