Method and system for transmitting and receiving signals transmitted from an antenna array with transmit diversity techniques

A system for transmitting data from a transmitter to a receiver in a wireless communication system, wherein the transmitter uses an antenna array to transmit a signal having transmit diversity, the system comprising:

• a commutator for commutating groups of symbols of an input data stream to produce first and a second commutated data streams;
• a first space-time coder for space-time coding the first commutated data stream to produce first and second transformed data streams;
• a second space-time coder for space-time coding the second commutated data stream to produce third and fourth transformed data streams;
• spreaders for spreading each transformed data stream with a selected one of a plurality of spreading codes to produce a plurality of antenna signals;
• and
• transmitters for transmitting each of the plurality of antenna signals using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity.

A method for receiving data in a receiver in a wireless communication system, wherein the data has been transmitted from a transmitter using an antenna array to transmit a signal having transmit diversity, the method comprising the steps of:

• receiving and down-converting a received signal to produce a baseband received signal;
• despreading the baseband received signal using despreading codes that correspond to spreading codes used in the transmitter to produce antenna signals that are transmitted from antennas in the antenna array, wherein the despreading produces received transformed signals;
• space-time decoding each received transformed signal to produce inverse transformer output signals;
• and
• de-commutating all inverse transformer output signals to produce a signal containing traffic channel data.

A system for receiving data in a receiver in a wireless communication system, wherein the data has been transmitted from a transmitter using an antenna array to transmit a signal having transmit diversity, the system comprising:

• a receiver for receiving and down-converting a received signal to produce a baseband received signal;
• despreaders for despreading the baseband received signal using despreading codes that correspond to spreading codes used in the transmitter to produce antenna signals that are transmitted from antennas in the antenna array, wherein the despreading produces received transformed signals;
• space-time decoders for space-time decoding each received transformed signal to produce inverse transformer output signals;
• and
• a de-commutator for de-commutating all inverse transformer output signals to produce a signal containing traffic channel data.

A method for transmitting data from a transmitter to a receiver in a wireless communication system, wherein the transmitter uses an antenna array to transmit a signal having transmit diversity, the method comprising the steps of:

• space-time coding groups of symbols of an input data stream to produce first and second transformed data streams;
• spreading each transformed data stream with a same spreading code to produce a plurality of antenna signals;
• selecting one of a plurality of space apart antennas from the antenna array for each one of the plurality of antenna signals, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity;
• and
• transmitting each of the plurality of antenna signals from the selected one of the plurality of spaced apart antennas.

A system for transmitting data from a transmitter to a receiver in a wireless communication system, wherein the transmitter uses an antenna array to transmit a signal having transmit diversity, the system comprising:

• a space-time coder for space-time coding groups of symbols of an input data stream to produce first and second transformed data streams;
• spreaders for spreading each transformed data stream with a same spreading code to produce a plurality of antenna signals;
• means for selecting one of a plurality of spaced apart antennas from the antenna array for each one of the plurality of antenna signals, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity;
• and
• a transmitter for transmitting each of the plurality of antenna signals from the selected one of the plurality of spaced apart antennas.

A method for receiving data in a receiver in a wireless communication system, wherein the data has been transmitted from a transmitter using selected antennas in an antenna array for selected time periods to transmit a signal having different channels in response to the selected antennas in the selected time periods, the method comprising the steps of:

• receiving and down-converting a received signal to produce a baseband received signal;
• despreading the baseband received signal using a despread code that corresponds to a spreading code used in the transmitter to produce a plurality of antenna signals that are transmitted from selected antennas in the antenna array, each antenna in the antenna array utilizing a same spreading code, wherein the despreading produces received transformed signals;
• and
• in response to the channel determined by the selected antennas in the selected time period, space-time decoding each received transformed signal to produce inverse transformed output signals.

A system for receiving data in a receiver ina wireless communication system, wherein the data has been transmitted from a transmitter using selected antennas in an antenna array for selected time periods to transmit a signal having different channels in response to the selected antennas in the selected time periods, the system comprising:

• a receiver for receiving and down-converting a received signal to produce a baseband received signal;
• a despreader for despreading the baseband received signal using a despreading code that corresponds to a spreading code used in the transmitter to produce a plurality of antenna signals that are transmitted from selected antennas utilizing a same spreading code for each antenna in the antenna array, wherein the despreading produces received transformed signals;
• and
• an inverse transformer for inverse transforming each received transformed signal to produce inverse transformer output signals in response to the channel determined by the selected antennas in the selected time period.