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AssigneeLucent Technologies Inc.
InventorsGerard J. Foschini, Constantinos B. Papadias
Estimating the term…
When using four transmit antennas, conventional channel coding is employed for a decoupled space-time coding approach for each of a number, L, of data substreams derived from the overall source bit stream. The symbols of the data substreams, after any encoding, are processed and the resulting derivatives of the encoded data substreams, which includes at least the complex conjugate of one of the encoded symbols, are grouped to form four transmit time sequences each one spanning L symbol periods which form a transmission matrix B. Each row of the matrix corresponds to an antenna, and the elements of each row represent the samples of a temporal sequence that is emitted by the antenna in L symbol periods. When L=4 the matrix B can be arranged as follows: 1 T 1 T 2 T 3 T 4 Antenna 1 Antenna 2 Antenna 3 Antenna 4 [ b 1 b 2 * b 3 b 4 * b 2 - b 1 * - b 4 b 3 * b 3 b 4 * - b 1 - b 2 * b 4 - b 3 * b 2 - b 1 * ] where b1, b2, b3, and b4 are the encoded symbols from the data substreams and * indicates complex conjugate.
A method for use in a transmitter adapted to employ four transmit elements to transmit a source bit stream, the method comprising the steps of:
A transmitter adapted for use with four transmit elements to transmit a source bit stream, comprising:
A transmitter for use with four transmit elements for transmitting a source bit stream, comprising:
A transmitter adapted for use with four transmit elements to transmit a source bit stream, comprising:
A method for use in processing received signals that were transmitted via four transmit elements of a transmitter, said transmitter being adapted to transmit a source bit stream by dividing said source bit stream into L data substreams, L>2 and grouping derivatives of symbols derived from each of said data substreams to form four transmit time sequences, one sequence for each transmit element, each of said time sequences spanning L symbol periods, at least one of said derivatives of said symbols being a complex conjugate of one of said symbols, said method comprising the step of:
Apparatus for use in processing received signals that were transmitted via four transmit elements of a transmitter, said transmitter being adapted to transmit a source bit stream by dividing said source bit stream into L data substreams, L>2 and grouping derivatives of symbols derived from each of said data substreams to form four transmit time sequences, one sequence for each transmit element, each of said time sequences spanning L symbol periods, at least one of said derivatives of said symbols being a complex conjugate of one of said symbols, said apparatus comprising:
Dependencies are inferred from the claim text.