Modified block space time transmit diversity encoder
AssigneeInterDigital Technology Corporation
InventorsYounglok Kim, Ariela Zeira
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Abstract
The present invention is a system and method for transmitting data symbols in a CDMA communication system including a transmitter having an antenna array and a receiver. The system generates a first and second data field of symbols, then encodes them to produce complex conjugates of the respective symbols. A first communication burst including the first and second data fields, which are separated by a midamble, over a first antenna, and a second communication burst produced using said complex conjugates of said first and second data fields, which are separated by a midamble, over a second antenna are then transmitted by the transmitter. The receiver then receives and decodes the first and second communication bursts to recover the first and second data fields.
Claims9
A method for transmitting data symbols in a CDMA communication system including a transmitter having an antenna array and a receiver, the method comprising the steps of:
- generating a first and second data field of symbols;
- encoding said first and second data field producing complex conjugates of the symbols of said first and second data field;
- transmitting from the said transmitter a first communication burst including said first and second data fields separated by a midamble over a first antenna and a second communication burst produced using said complex conjugates of said first and second data fields separated by a midamble over a second antenna;
- receiving and decoding at said receiver said first and second communication bursts to recover said first and second data fields, the decoding being performed after said first burst midamble and said second burst midamble are canceled;
- wherein said first communication burst comprises said first data field followed by said first burst midamble followed by said second data field followed by a first guard period;
- and
- said second communication burst comprises a negative complex conjugate of said second data field followed by said second burst midamble followed by a complex conjugate of said first data field followed by a second guard period.
A CDMA communication system including a base station and a user equipment (UE), comprising:
- an encoder which encodes a first and second data field of symbols to produce complex conjugates of the symbols of said first and second data fields;
- a first and second antenna of a transmitter which transmits RF signals including a first and second communication burst, wherein said first communication burst including said first and second data fields separated by a midamble is transmitted by said first antenna and said second communication burst produced using said complex conjugates of said first and second data fields separated by a midamble is transmitted by said second antenna;
- a receiver comprising a decoder which decodes said RF signals to recover said first and second data fields, the decoding being performed after said first burst midamble and said second burst midamble are canceled;
- a first burst generator, associated with said first antenna, which generates said first communication burst including said first data field followed by said first burst midamble followed by said second data field followed by a first guard period;
- and
- a second burst generator, associated with said second antenna, which generates said second communication burst including said negated complex conjugate of said second data field followed by said second burst midamble followed by said complex conjugate of said first data field followed by a second guard period.
Dependencies are inferred from the claim text.