公开(公告)号：EP1726104A4

公开(公告)日：2011-05-18

申请号：EP04808516

申请日：2004-12-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE WOO-YONG ,  OH HYUN-SEO ,  BAI DONG-WOON

IPC: H04B7/02 ,  H04B1/707 ,  H04B7/06 ,  H04J99/00 ,  H04L1/06 ,  H04W16/28 ,  H04W76/02

CPC classification number: H04L1/065 ,  H04B1/707 ,  H04B7/02

Abstract: A diversity transmitting/receiving apparatus and method is provided, which is implemented using space-time trellis codes (STTC) constructed from a Pseudo Noise (PN) sequence set in a Direct Sequence (DS) CDMA system. The transmitter comprises a PN sequence generator, a space-time encoder, first and second modulators, and first and second multiple transmit antennas. The space-time encoder selects two of the multiple PN sequences to construct STTC, and space-time encodes data from a data source according to the STTC to output an Wary data symbol. The two modulators modulate the space-time encoded data according to the STTC. The two multiple transmit antennas wirelessly transmit outputs of the two modulators, respectively. By applying a method using space-time coding in a DS CDMA system including multiple transmit antennas, it is possible to achieve both diversity and additional coding gain and also to reduce multiple user interference by increasing the PN sequence length.