Signal transmission method using antenna diversity and corresponding apparatus

摘要

Encoded digital symbols (S1 S2 S3 S4 ) are transmitted via a first pair of antennas (Tx1, Tx2) and at least one second pair of antennas (Tx3, Tx4). The sets of symbols used for the transmission via the second pair of antennas (Tx3, Tx4) are re-ordered temporally (S3 S4 S1 S2 ) into subsets of symbols with respect to the symbols used for the first pair of antennas (Tx1, Tx2). For the first pair of antennas (Tx1, Tx2) there is used a signal subjected to encoding with a code-division-multiple-access code (CDMA) and subjected to spreading with a spreading code (c1), and, likewise, for the second pair or pairs of antennas (Tx3, Tx4) there are used signals subjected to encoding with respective code-division-multiple-access code (CDMA) and subjected to spreading with a respective spreading code (c2). At least one between the respective code-division-multiple-access code (CDMA) and the respective spreading code (c2) used for the transmission via the second pair of antennas (Tx3, Tx4) is different from the code-division-multiple-access code (CDMA) and from the spreading code (c1) used for the transmission via the first pair of antennas (Tx1, Tx2). The solution can be extended to the use of a plurality of second pairs of antennas in transmission and/or to the use of a plurality of antennas in reception. <IMAGE>