METHOD AND SYSTEM FOR PROVIDING FREQUENCY DOMAIN EQUALIZATION IN DIRECT-SEQUENCE CODE-DIVISION MULTIPLE-ACCESS SYSTEM

摘要

A method of equalizing in a receiver a received block that was scrambled before it was transmitted by a transmitter through a channel, the scrambled transmitted block having a prefix, a payload, and a suffix and the received block having a prefix, a payload, and a suffix, the method characterized in that before equalization in the frequency domain the received block is replaced by a synthesized block that would have been received if the suffix of the scrambled transmitted block had been identical to the prefix when the scrambled transmitted block was transmitted, the synthesized block having a synthesized portion selected from the group consisting of a prefix, a payload, and a suffix of the synthesized block formed by appending: the payload and suffix of the received block to the synthesized portion to form the synthesized block, if the selected synthesized portion is the prefix, the suffix of the received block to the synthesized portion to form the synthesized block, if the selected synthesized portion is the payload, and the payload of the received block to the synthesized portion to form the synthesized block if the selected synthesized portion is the suffix.