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US 8,509,326 B2Granted
OFDM space-time or space-frequency block code transmitter
AssigneeIntel Mobile Communications GmbH
InventorMarkus Mueck
Life of this patent
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Abstract
A transmitter for transmitting OFDM signals includes a space-time or space-frequency encoder to generate coded OFDM symbols by arranging a sequence of OFDM symbols or variants thereof in a predetermined space-time or space-frequency block matrix or a portion thereof. The transmitter also includes a frequency selector to select a particular OFDM carrier frequency out of a number of available OFDM carrier frequencies, and a signal generator to generate OFDM signals by applying the selected OFDM carrier frequency to the coded OFDM symbols.
Claims19
A transmitter for transmitting OFDM signal, comprising:
- a space-time or space frequency encoder configured to generate coded OFDM symbols by arranging a sequence of OFDM symbols or variants thereof in a predetermined space-time or space-frequency block matrix or a portion thereof according to a delay tolerant code,
- a frequency selector configured to select a particular OFDM carrier frequency out of a number of available OFDM carrier frequencies, and
- a signal generator configured to generate OFDM signals by applying the selected OFDM carrier frequency to the coded OFDM symbols;
- a first transmission unit comprising a first space-time or space-frequency encoder configured to generate first coded OFDM symbols by arranging the OFDM symbols of the sequence or variants thereof in a first portion of the predetermined space-time or space-frequency block matrix, a first signal generator configured to generate first coded OFDM signals by applying the selected OFDM carrier frequency to the first coded OFDM symbols, and at least one transmission antenna configured to transmit the first coded OFDM signals, and
- a second transmission unit spatially separated from the first transmission unit, the second transmission unit comprising a reception antenna configured to receive the first coded OFDM signals, a second space-time or space-frequency encoder configured to generate second coded OFDM symbols by arranging the OFDM symbols of the sequence or variants thereof in a second portion of the predetermined space-time or space-frequency block matrix, a second signal generator configured to generate second coded OFDM signals by applying the selected OFDM carrier frequency to the second coded OFDM symbols, and at least one transmission antenna to transmit the second coded OFDM signals.
2 more elements
A transmitter for transmitting OFDM signals, comprising:
- a first transmission unit comprising a first space-time or space-frequency encoder configured to generate first coded OFDM symbols by arranging a sequence of OFDM symbols or variants thereof in a first portion of a predetermined space-time block matrix, a first signal generator configured to generate first coded OFDM signals by applying an OFDM carrier frequency to the first coded OFDM symbols, and at least one transmission antenna configured to transmit the first coded OFDM signals, and
- a second transmission unit spatially separated from the first transmission unit, the second transmission unit comprising a reception antenna configured to receive the first coded OFDM signals, a second space-time or space-frequency encoder configured to generate second coded OFDM symbols by arranging the OFDM symbols of the sequence of variants thereof in a second portion of the predetermined space-time or space-frequency block matrix, a second signal generator configured to generate second coded OFDM signals by applying an OFDM carrier frequency to the second coded OFDM signals, and at least one transmission antenna configured to transmit the second coded OFDM signals, and
- an orthogonality operation unit arranged in one or more of the first transmission unit and the second transmission unit, wherein the orthogonality operation unit is configured to apply an orthogonality operation on one or more of the first coded OFDM signals and the second coded OFDM signals or respective particular ones thereof, so that time overlapping first and second coded OFDM symbols of successive blocks of OFDM symbols are orthogonal to each other.
A receiver for receiving OFDM signals, the OFDM signals being transmitted in the form of space-time or space-frequency coded blocks containing first coded OFDM signals and second coded OFDM signals, the receiver comprising:
- at least one reception antenna configured to receive the first and second coded OFDM signals, and
- an orthogonality operation unit configured to apply an orthogonality operation on one or more of the received first coded OFDM signals and the-received second coded OFDM signals or respective particular ones thereof, so that time overlapping first and second coded OFDM symbols of successive blocks of OFDM symbols are orthogonal to each other.
A method for transmitting and receiving OFDM signals, comprising:
- in a first OFDM transmission unit, generating first coded data symbols by arranging the OFDM symbols of the sequence or variants thereof in a space-time or space-frequency block matrix or a portion thereof, and transmitting the first coded data symbols,
- in a second OFDM transmission unit spatially separated from the first OFDM transmission unit, receiving the first coded data symbols, generating second coded data symbols by arranging the OFDM symbols of the sequence or variants thereof in the space-time or space-frequency block matrix or a portion thereof, and transmitting the second coded data symbols, and
- applying an orthogonality operation on the first or second coded data symbols or on respective particular ones thereof so that time overlapping first and second coded data symbols of successive blocks of coded data symbols are orthogonal to each other.
Dependencies are inferred from the claim text.